Artigos de revistas: "Fluid-Structure impact"

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Vesenjak, Matej, Zoran Ren e Mojtaba Moatamedi. "Multiphysics Study of Structural Impact to Fluidic Media". Materials Science Forum 673 (janeiro de 2011): 1–10. http://dx.doi.org/10.4028/www.scientific.net/msf.673.1.

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The paper presents a fluid structure interaction based numerical study of impact loading for a hemispherical structure upon water and a space capsule water landing. The study has a strong relevance in the determination of the crashworthiness of aerospace structures upon water impact loading. Finite element based numerical techniques have been used for the analysis of the underlying transient dynamic and fluid-structure interaction. Smoothed Particle Hydrodynamics (SPH) and Arbitrary Lagrange-Eulerian (ALE) methods have been used to simulate the behaviour of the fluid (water) under impact conditions. The accelerations and velocities of the impacting objects have been validated with by experimental measurements and analytical results. Numerical analyses showed a strong potential for the use of developed computational fluid structure interaction models for analyses of water impact loading related problems.

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Wagner, Simon, Rasoul Sheikhi, Fabian Kayatz, Manuel Münsch, Marek Hauptmann e Antonio Delgado. "Fluid–structure‐interaction simulations of forming‐air impact thermoforming". Polymer Engineering & Science 62, n.º 4 (9 de fevereiro de 2022): 1294–309. http://dx.doi.org/10.1002/pen.25926.

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Zhang, Qingjie, Qinghua Qin e Jianzhong Wang. "A theoretical model on coupled fluid-structure impact buckling". Applied Mathematical Modelling 17, n.º 1 (janeiro de 1993): 25–33. http://dx.doi.org/10.1016/0307-904x(93)90124-y.

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Pacek, Dawid, e Roman Gieleta. "The fluid-based structure for human body impact protection". Journal of Physics: Conference Series 1507 (março de 2020): 032016. http://dx.doi.org/10.1088/1742-6596/1507/3/032016.

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Sun, Shili, e Guoxiong Wu. "Fully nonlinear simulation for fluid/structure impact: A review". Journal of Marine Science and Application 13, n.º 3 (27 de agosto de 2014): 237–44. http://dx.doi.org/10.1007/s11804-014-1253-y.

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Gu, Hua, e Gen Hua Yan. "Research on the Effect of Fluid-Structure Interaction on Dynamic Response of Gate Structure". Advanced Materials Research 199-200 (fevereiro de 2011): 811–18. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.811.

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This essay reveals that on the basis of fluid-structure interaction having appreciable impact on auto-vibration of gate structure, analysis and calculation on dynamic response characteristics of gate structural fluid-structure interaction have been conducted. The results indicate that under the same dynamic load the structural dynamic response value with fluid-structure interaction effect considered is remarkably larger than vibration response with fluid-structure interaction effect considering. The calculating results indicate that the largest response increase of typical parts of gate structure is from 50% to 60%. Therefore, as to making calculations on structural dynamic response with fluid-structure interaction effect, the impact flow field exerting on structural response should be taken into consideration.

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INABA, Kazuaki, e Joseph E. SHEPHERD. "OS0907 Impact generated stress waves and coupled fluid-structure responses in a fluid-filled tube". Proceedings of the Materials and Mechanics Conference 2009 (2009): 182–83. http://dx.doi.org/10.1299/jsmemm.2009.182.

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Griffith, Boyce E., e Neelesh A. Patankar. "Immersed Methods for Fluid–Structure Interaction". Annual Review of Fluid Mechanics 52, n.º 1 (5 de janeiro de 2020): 421–48. http://dx.doi.org/10.1146/annurev-fluid-010719-060228.

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Fluid–structure interaction is ubiquitous in nature and occurs at all biological scales. Immersed methods provide mathematical and computational frameworks for modeling fluid–structure systems. These methods, which typically use an Eulerian description of the fluid and a Lagrangian description of the structure, can treat thin immersed boundaries and volumetric bodies, and they can model structures that are flexible or rigid or that move with prescribed deformational kinematics. Immersed formulations do not require body-fitted discretizations and thereby avoid the frequent grid regeneration that can otherwise be required for models involving large deformations and displacements. This article reviews immersed methods for both elastic structures and structures with prescribed kinematics. It considers formulations using integral operators to connect the Eulerian and Lagrangian frames and methods that directly apply jump conditions along fluid–structure interfaces. Benchmark problems demonstrate the effectiveness of these methods, and selected applications at Reynolds numbers up to approximately 20,000 highlight their impact in biological and biomedical modeling and simulation.

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Baragamage, Dilshan S. P. Amarasinghe, e Weiming Wu. "A Three-Dimensional Fully-Coupled Fluid-Structure Model for Tsunami Loading on Coastal Bridges". Water 16, n.º 1 (4 de janeiro de 2024): 189. http://dx.doi.org/10.3390/w16010189.

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A three-dimensional (3D) fully-coupled fluid-structure model has been developed in this study to calculate the impact force of tsunamis on a flexible structure considering fluid-structure interactions. The propagation of a tsunami is simulated by solving the 3D Navier–Stokes equations using a finite volume method with the volume-of-fluid technique. The structure motion under the tsunami impact force is simulated by solving the motion equation using the generalized alpha method. The structure motion is fed back into the fluid solver via a technique that combines a sharp-interface immersed boundary method with the cut-cell method. The flow model predicts accurate impact forces of dam-break flows on rigid blocks in three experimental cases. The fully coupled 3D flow-structure model is tested with experiments on a large-scale (1:5) model bridge under nonbreaking and breaking solitary waves. The simulated wave propagation and structure restoring forces generally agree well with the measured data. Then, the fully-coupled fluid-structure model is compared with an uncoupled model and applied to assess the effect of flexibility on structure responses to tsunami loading, showing that the restoring force highly depends on the dynamic characteristics of the structure and the feedback coupling between fluid and structure. The maximum hydrodynamic and restoring forces decrease with increasing structure flexibility.

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Lu, Tao, Jiaxia Wang, Kun Liu e Xiaochao Zhao. "Experimental and Numerical Prediction of Slamming Impact Loads Considering Fluid–Structure Interactions". Journal of Marine Science and Engineering 12, n.º 5 (28 de abril de 2024): 733. http://dx.doi.org/10.3390/jmse12050733.

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Slamming impacts on water are common occurrences, and the whipping induced by slamming can significantly increase the structural load. This paper carries out an experimental study of the water entry of rigid wedges with various deadrise angles. The drop height and deadrise angle are parametrically varied to investigate the effect of the entry velocity and wedge shape on the impact dynamics. A two-way coupled approach combing CFD method software STAR-CCM+12.02.011-R8 and the FEM method software Abaqus 6.14 is presented to analyze the effect of structural flexibility on the slamming phenomenon for a wedge and a ship model. The numerical method is validated through the comparison between the numerical simulation and experimental data. The slamming pressure, free surface elevation, and dynamic structural response, including stress and strain, in particular, are presented and discussed. The results show that the smaller the inclined angle at the bottom of the wedge-shaped body, the faster the entry speed into the water, resulting in greater impact pressure and greater structural deformation. Meanwhile, studies have shown that the bottom of the bow is an area of concern for wave impact problems, providing a basis for the assessment of ship safety design.

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Zhu, Jia. "Impact resistance analysis of grille dam based on fluid structure interaction". E3S Web of Conferences 248 (2021): 03061. http://dx.doi.org/10.1051/e3sconf/202124803061.

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Aiming at the impact failure of debris flow grille dam, considering the interaction of boulder-debris flow slurry- grille dam based on SPH-FEM, this article analyzed the variation laws of velocity, impact force and support reaction before and after debris flow slurry and boulders passing through grille dam. The results show that: SPH-FEM coupling method can truly reappear the impact of debris flow on the grille dam; the velocity of debris flow slurry and boulder are reduced by nearly 60% after passing through the dam, and the effect is remarkable; debris flow slurry and boulder have secondary impact on the grille dam. In the first impact, the greater the radius of the boulder, the greater the impact force; in the second impact, the impact force has nothing to do with the radius of the boulder.

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Failer, Lukas, Piotr Minakowski e Thomas Richter. "On the Impact of Fluid Structure Interaction in Blood Flow Simulations". Vietnam Journal of Mathematics 49, n.º 1 (28 de janeiro de 2021): 169–87. http://dx.doi.org/10.1007/s10013-020-00456-6.

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AbstractWe study the impact of using fluid-structure interactions (FSI) to simulate blood flow in a stenosed artery. We compare typical flow configurations using Navier–Stokes in a rigid geometry setting to a fully coupled FSI model. The relevance of vascular elasticity is investigated with respect to several questions of clinical importance. Namely, we study the effect of using FSI on the wall shear stress distribution, on the Fractional Flow Reserve and on the damping effect of a stenosis on the pressure amplitude during the pulsatile cycle. The coupled problem is described in a monolithic variational formulation based on Arbitrary Lagrangian Eulerian (ALE) coordinates. For comparison, we perform pure Navier–Stokes simulations on a pre-stressed geometry to give a good matching of both configurations. A series of numerical simulations that cover important hemodynamical factors are presented and discussed.

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Kwon, Young, Angela Owens, Aric Kwon e Jarema Didoszak. "Experimental Study of Impact on Composite Plates with Fluid-Structure Interaction". International Journal of Multiphysics 4, n.º 3 (outubro de 2010): 259–71. http://dx.doi.org/10.1260/1750-9548.4.3.259.

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Battley, Mark, e Tom Allen. "Characterisation of fluid-structure interaction for water impact of composite panels". International Journal of Multiphysics 6, n.º 3 (setembro de 2012): 283–304. http://dx.doi.org/10.1260/1750-9548.6.3.283.

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Carr, Marcus E. "Fluid Phase Coagulation Events Have Minimal Impact on Plasma Fibrin Structure". American Journal of the Medical Sciences 295, n.º 5 (maio de 1988): 433–37. http://dx.doi.org/10.1097/00000441-198805000-00004.

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Leonardi, Alessandro, Falk K. Wittel, Miller Mendoza, Roman Vetter e Hans J. Herrmann. "Particle-Fluid-Structure Interaction for Debris Flow Impact on Flexible Barriers". Computer-Aided Civil and Infrastructure Engineering 31, n.º 5 (17 de agosto de 2015): 323–33. http://dx.doi.org/10.1111/mice.12165.

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Shams, Adel, Valentina Lopresto e Maurizio Porfiri. "Modeling fluid-structure interactions during impact loading of water-backed panels". Composite Structures 171 (julho de 2017): 576–90. http://dx.doi.org/10.1016/j.compstruct.2017.02.098.

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LU, C. H., Y. S. HE e G. X. WU. "COUPLED ANALYSIS OF NONLINEAR INTERACTION BETWEEN FLUID AND STRUCTURE DURING IMPACT". Journal of Fluids and Structures 14, n.º 1 (janeiro de 2000): 127–46. http://dx.doi.org/10.1006/jfls.1999.0257.

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Cong, Hua, Mingmei Zhao, Jinqiu Zhang e Yile Liu. "Design and mechanical analysis of shear thickening fluid/polyurethane composite sandwich". MATEC Web of Conferences 380 (2023): 01030. http://dx.doi.org/10.1051/matecconf/202338001030.

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In this paper, high density rigid polyurethane foam is used as sandwich skeleton and shear thickening fluid as material core. A shear thickening fluid/polyurethane sandwich structure with light impact resistance was designed and fabricated. High strain rate impact test was carried out. It was found that STF-2/PU reached the peak load of 4978N in 13 ms after receiving 20 J impact energy, and the energy absorption ratio was as high as 43%. The shear thickening fluid/polyurethane honeycomb sandwich foam prepared by secondary foaming process has stable structure and can effectively absorb impact energy to achieve good protection effect.

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Ren, Zoran, Matej Vesenjak e Andreas Öchsner. "Behaviour of Cellular Structures under Impact Loading a Computational Study". Materials Science Forum 566 (novembro de 2007): 53–60. http://dx.doi.org/10.4028/www.scientific.net/msf.566.53.

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New multiphysical computational models for simulation of regular open and closed-cell cellular structures behaviour under compressive impact loading are presented. The behaviour of cellular structures with fluid fillers under uniaxial impact loading and large deformations has been analyzed with the explicit nonlinear finite element code LS-DYNA. The behaviour of closed-cell cellular structure has been evaluated with the use of the representative volume element, where the influence of residual gas inside the closed pores has been studied. Open-cell cellular structure was modelled as a whole to properly account for considered fluid flow through the cells, which significantly influences macroscopic behaviour of cellular structure. The fluid has been modelled by applying a Smoothed Particle Hydrodynamics (SPH) method. Computational simulations showed that the base material has the highest influence on the behaviour of cellular structures under impact conditions. The increase of the relative density and strain rate results in increase of the cellular structure stiffness. Parametrical numerical simulations have also confirmed that filler influences the macroscopic behaviour of the cellular structures which depends on the loading type and the size of the cellular structure. In open-cell cellular structures with higher filler viscosity and higher relative density, increased impact energy absorption has been observed.

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MUTSUDA, Hidemi, Yoshiaki SHINKURA e Yasuaki DOI. "Numerical method of Fluid Structure Interaction Caused by Impact Pressure and Dynamic Response of Structure". PROCEEDINGS OF COASTAL ENGINEERING, JSCE 55 (2008): 31–35. http://dx.doi.org/10.2208/proce1989.55.31.

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Zhou, Min Zhe, Tong Chun Li, Yuan Ding e Xiao Chun Zhou. "Fluid-Structure Interaction Analysis of Layered Water Intake Structure Considering Load Changes". Advanced Materials Research 1065-1069 (dezembro de 2014): 569–74. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.569.

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Coupled vibration of water and stop log gate in the layered water intake structure will occur under the condition of the sudden load changes. A fluid-structure interaction (FSI) finite element model of the layered water intake structure of a hydropower station was established by using the finite element software ADINA to simulate the process of power on and off and the FSI phenomena of stop log gate during each process, and also verify the security of the scheme. The results show that fluid-structure interaction has a significant impact on the running of the layered water intake.

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Portemont, G., E. Deletombe e P. Drazetic. "Assessment of basic experimental impact simulations for coupled fluid/structure interactions modeling". International Journal of Crashworthiness 9, n.º 4 (agosto de 2004): 333–39. http://dx.doi.org/10.1533/ijcr.2004.0293.

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Zhang, Huan, Jun Chen e Feng Feng. "Numerical Simulation of Fluid-Structure Interaction in SRM under Cold-Flow Impact". Applied Mechanics and Materials 281 (janeiro de 2013): 245–49. http://dx.doi.org/10.4028/www.scientific.net/amm.281.245.

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The process of impacting adherent casting solid rocket motor under cool-flow impact was simulated using two-way fluid-solid coupling method by ANSYS workbench14.0. In order to truly reflect the interaction between the establishment of the flow field in the cool air impact process and the SRM grain, the impact pressure to the SRM grain was provided with reference to the structure of the shock tube. The process of the establishment and spread of the flow field pressure was simulated, according to the grain deformation under the cool air impact, the maximum deformation position of the grain was determined. The relationship between the amount of grain deformation and flow field pressure gradient was summed up by observing the law of flow field pressure distribution along the axial coupling surface.

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Yim, Solomon C., e Wenbin Zhang. "A Multiphysics Multiscale 3-D Computational Wave Basin Model for Wave Impact Load on a Cylindrical Structure". Journal of Disaster Research 4, n.º 6 (1 de dezembro de 2009): 450–61. http://dx.doi.org/10.20965/jdr.2009.p0450.

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A multiphysics multiscale finite-element based nonlinear computational wave basin (CWB) model is developed using LS-DYNA. Its predictive capability is calibrated using a large-scale fluid-structure interaction experiment conducted in a 3-dimensional wave basin to determine wave impact on a cylindrical structure. This study focuses on evaluating CWB accuracy using two wave excitation conditions — plane and focused solitary waves — and two cylinder arrangements — single and multiple cylinders. Water surface elevation and water particle velocity are predicted numerically for the fluid domain, obtaining horizontal force, overturning moment, and dynamic pressure on the cylindrical structure and calibrated against experimental measurement. The CWB model predicts wave motion characteristics — water surface elevation and velocity, and integrated structural response — horizontal force and overturning moment, for the given wave conditions well. Computation time increases and the predictive accuracy decreases as nonlinear fluid-structure interaction becomes increasingly complex. A study of computation settings for improving computation performance showed that a high-performance parallel-computing hardware platform is needed to model details of highly nonlinear physics of fluid flow including wave breaking and turbulence.

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Wang, Yin-hui, Yi-song Zou, Lue-qin Xu e Zheng Luo. "Analysis of Water Flow Pressure on Bridge Piers considering the Impact Effect". Mathematical Problems in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/687535.

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In order to investigate the effects of water current impact and fluid-structure interaction on the bridge piers, the mechanism of water flow impact on the bridge pier is firstly studied. Then a finite element model of a bridge pier is established including the effects of water flow impact as well as the water circumferential motion around the pier. Comparative study is conducted between the results of water impact effect, fluid-structure coupling effect, theoretical analysis, and also the results derived using the formulas specified in the design codes home and abroad. The results show that the water flow force calculated using the formulas provided by the codes should be multiplied by an impact amplifier to account for the effect of flood impact on the bridge pier. When the flood flows around the pier, the fluid-structure coupling effect on the bridge pier can be neglected. The method specified in the China guidelines ofGeneral Code for Design of Highway Bridges and Culvertstends to provide a larger result of the water flow force.

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Guo, Bao Dong, Qiu Lin Qu, Jia Li Wu e Pei Qing Liu. "Fluid-Structure Interaction Modeling by ALE and SPH". Applied Mechanics and Materials 275-277 (janeiro de 2013): 393–97. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.393.

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The outcomes of a research focusing on water modeling and Fluid-Structure Interaction by ALE and SPH in LSTC/LS-Dyna971 are presented in this paper. Firstly the water impact behaviors of a rigid wedge are modeled with water region by ALE and SPH. The size of fluid elements plays critical role to the numerical results, so three different cases varied in mesh or particle spacing both in ALE and SPH methods are detailed discussed. The numerical results are compared both one to the others and to the experimental and theoretical results in terms of vertical velocity and slamming force, which can be concluded that the more elements modeled in the simulation, the better approximation with the experiment results. An additional discussion of propagation of pressure wave by SPH and CPU time are also presented.

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Sauve´, R. G., G. D. Morandin e E. Nadeau. "Impact Simulation of Liquid-Filled Containers Including Fluid-Structure Interaction—Part 1: Theory". Journal of Pressure Vessel Technology 115, n.º 1 (1 de fevereiro de 1993): 68–72. http://dx.doi.org/10.1115/1.2929497.

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In a number of applications, the hydrodynamic effect of a fluid must be included in the structural evaluation of liquid-filled vessels undergoing transient loading. Prime examples are liquid radioactive waste transportation packages. These packages must demonstrate the ability to withstand severe accidental impact scenarios. A hydrodynamic model of the fluid is developed using a finite element discretization of the momentum equations for a three-dimensional continuum. An inviscid fluid model with an isotropic stress state is considered. A barotropic equation of state, relating volumetric strain to pressure, is used to characterize the fluid behavior. The formulation considers the continuum as a compressible medium only, so that no tension fields are permitted. The numerical technique is incorporated into the existing general-purpose three-dimensional structural computer code H3DMAP. Part 1 of the paper describes the theory and implementation along with comparisons with classical theory. Part 2 describes the experimental validation of the theoretical approach. Excellent correlation between predicted and experimental results is obtained.

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Liu, Jing, e Gaochao Wang. "Seismic Performance of Building Structures Using Structural Integral Mechanics Model under the Guidance of Fluid Mechanics". Highlights in Science, Engineering and Technology 77 (29 de novembro de 2023): 1–12. http://dx.doi.org/10.54097/hset.v77i.14353.

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The purpose is to study the core causes of serious collapse of buildings damaged in the earthquake and improve the seismic performance of buildings to reduce casualties. First, the theoretical overview of seismic engineering and related form and requirements of the building structure are deeply studied. Next, the building node structure is deeply analyzed according to the knowledge of fluid mechanics and the basic idea of the finite element method of integral structure. The seismic performance of building structures and the principles and requirements of seismic engineering are analyzed and summarized. It is found that the concrete analysis and description of seismic performance in the research method of fluid mechanics is a steel structure’s bending resistance, deformation and displacement degree, and the bearing degree of external impact force. Further, the model design of the integral structure is carried out through the finite element idea of fluid mechanics. Then, the model simulation experiment is conducted to obtain the curve of the impact force on the building structure, the ultimate bearing capacity of the steel beam joint and the skeleton displacement under the impact. Meanwhile, the degradation of stiffness and strength of node structure during an earthquake is analyzed. Finally, through the simulation results, it is concluded that the maximum displacement between node members under the action of impact force is no more than 300mm, so the model has high impact bearing capacity and strong seismic capacity, and can meet the requirements of seismic fortification. This exploration will be of great significance to the development of building seismic engineering under the guidance of fluid mechanics.

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Liu, Xinying, e David F. Fletcher. "Verification of fluid-structure interaction modelling for wave propagation in fluid-filled elastic tubes". Journal of Algorithms & Computational Technology 17 (janeiro de 2023): 174830262311597. http://dx.doi.org/10.1177/17483026231159793.

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This paper presents a verification study of wave propagation in fluid-filled elastic tubes using a coupled numerical simulation method by comparing the simulation results with analytical solutions. A three-dimensional fluid-structure interaction numerical model is built using Ansys software. Wave propagation is investigated by applying a pressure pulse at the inlet of a fluid-filled elastic tube. The speed of the pressure wave and the radial displacement of the tube are simulated and compared with theoretical values. Simulation results yield a high level of accuracy. Different structural elements are used to represent the tube, and their impact on the results is discussed. The effects of tube material, tube constraints and fluid properties are also investigated in this study.

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Xiao, Yufang, Zhengqin Ye, Hongliang Wang, Hailong Yang, Nana Mu, Xinyuan Ji e He Zhao. "Pore Structure Characteristics of Shale Oil Reservoirs with Different Lithofacies and Their Effects on Mobility of Movable Fluids: A Case Study of the Chang 7 Member in the Ordos Basin, China". Energies 17, n.º 4 (12 de fevereiro de 2024): 862. http://dx.doi.org/10.3390/en17040862.

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The Chang 7 member of the Triassic Yanchang Formation in the Ordos Basin is a significant continent shale oil reservoir in China. Therefore, conducting an in-depth investigation into the pore structure and fluid mobility characteristics of the Chang 7 shale oil reservoir holds immense importance for advancing shale oil exploration. This study conducts a detailed analysis of the pore structures and their impact on fluid mobility of the Chang 7 shale oil reservoir using multiple methodologies, i.e., a cast thin section, scanning electron microscopy (SEM), X-ray diffraction (XRD), high-pressure mercury injection (HPMI), low-temperature nitrogen adsorption (LTNA), and nuclear magnetic resonance (NMR). The results show that the sandstone in the Yanwumao area of the Chang 7 shale oil reservoir consists mainly of lithic arkose and feldspathic litharenite, which can be classified into three lithofacies (massive fine-grained sandstone (Sfm), silt-fine sandstone with graded bedding (Sfgb), and silt-fine sandstone with parallel bedding (Sfp)). Moreover, three pore structures (Type I, II, and III), and four pore spaces (nanopores, micropores, mesopores, and macropores) can be characterized. Pore structure Type I, characterized by large pores, exhibits bimodal pore diameter curves, resulting in the highest levels of movable fluid saturation (MFS) and movable fluid porosity (MFP). Pore structure Type II demonstrates unimodal pore structures, indicating robust connectivity, and higher MFS and MFP. Pore structure Type III primarily consists of dissolved and intercrystalline pores with smaller pore radii, a weaker pore configuration relationship, and the least fluid mobility. Furthermore, a correlation analysis suggests that the pore structure significantly impacts the fluid flowability in the reservoir. Favorable petrophysical properties and large pores enhance fluid flowability. Micropores and mesopores with high fractal dimensions have a greater impact on reservoir fluid mobility compared to macropores and nanopores. Mesopores mainly control MFS and MFP, while micropores govern the shift from bound fluid to movable fluid states. Among the lithofacies types, the Sfm lithofacies exhibit the highest fluid mobility due to their significant proportion of macropores and mesopores, whereas the Sfgb lithofacies have lower values because they contain an abundance of micropores. The Sfp lithofacies also dominate macropores and mesopores, resulting in medium fluid mobility levels. This study combines lithofacies types, micro-reservoir pore structure characteristics, and mobile fluid occurrence characteristics to better understand the dominant reservoir distribution characteristics of the Chang 7 shale oil reservoirs in the Ordos Basin and provide theoretical information for further optimization of production strategies.

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Sun, Wen Bin. "Numerical Analysis of Fluid-Structure Interaction of Frame Structure Considering the Impact of Turbulent Wind Load". Applied Mechanics and Materials 94-96 (setembro de 2011): 2130–33. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.2130.

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According to the basic principle of CFD simulation and methods, a framework structure was studied for its vortex-induced vibration and control principle of around the flow field, it revealed the characteristics of vortex-induced vibration and rules, systematically studied frame structure fluid-solid coupling effect and the flow field active control methods and mechanism. Results provide the theory basis for the frame structure around the flow field and the wind induced vibration effect.

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Aboshio, Aaron, Sarah Green e Jianqiao Ye. "Structural Performance of a Woven-Fabric Reinforced Composite as Applied in Construction of Inflatable Offshore Fender Barrier Structures". International Journal of Structural Stability and Dynamics 15, n.º 01 (janeiro de 2015): 1450036. http://dx.doi.org/10.1142/s0219455414500369.

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This paper investigates the dynamic structural behavior of woven-fabric reinforced composites with high matrix–fabric volume fraction as applied in the construction of crash or security barriers typified by the Inflatable Offshore Fender Barrier Structure (IOFBS). Dynamic analysis of the IOFBS comprising of over 98% of the composite under impact loading was carried out using the finite element method employing the Coupled Eulerian–Lagrangian (CEL) formulation. The barriers were inflated to 6 kPa and 7 kPa initial pneumatic fluid pressures and subjected to crash loadings from a high velocity vessel. The enclosed fluid of the structure was modeled based on the Shomate equation and fluid behavior of water on which the structure floats was modeled using Us-Up Hugoniot equation of state. The barriers' membrane stresses distributions, deformations, internal fluid pressure surge and volume variations of the structures after impact as well as vessel's degree of instability and deceleration after impact for different initial inflation pressures were computed and studied. The developed models and numerical results obtained are useful in assessing the performance of the composite as used in the IOFBS and similar structures and in improving the design of the structure.

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Tang, Elaine, Zhenglun (Alan) Wei, Mark A. Fogel, Alessandro Veneziani e Ajit P. Yoganathan. "Fluid-Structure Interaction Simulation of an Intra-Atrial Fontan Connection". Biology 9, n.º 12 (24 de novembro de 2020): 412. http://dx.doi.org/10.3390/biology9120412.

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Total cavopulmonary connection (TCPC) hemodynamics has been hypothesized to be associated with long-term complications in single ventricle heart defect patients. Rigid wall assumption has been commonly used when evaluating TCPC hemodynamics using computational fluid dynamics (CFD) simulation. Previous study has evaluated impact of wall compliance on extra-cardiac TCPC hemodynamics using fluid-structure interaction (FSI) simulation. However, the impact of ignoring wall compliance on the presumably more compliant intra-atrial TCPC hemodynamics is not fully understood. To narrow this knowledge gap, this study aims to investigate impact of wall compliance on an intra-atrial TCPC hemodynamics. A patient-specific model of an intra-atrial TCPC is simulated with an FSI model. Patient-specific 3D TCPC anatomies were reconstructed from transverse cardiovascular magnetic resonance images. Patient-specific vessel flow rate from phase-contrast magnetic resonance imaging (MRI) at the Fontan pathway and the superior vena cava under resting condition were prescribed at the inlets. From the FSI simulation, the degree of wall deformation was compared with in vivo wall deformation from phase-contrast MRI data as validation of the FSI model. Then, TCPC flow structure, power loss and hepatic flow distribution (HFD) were compared between rigid wall and FSI simulation. There were differences in instantaneous pressure drop, power loss and HFD between rigid wall and FSI simulations, but no difference in the time-averaged quantities. The findings of this study support the use of a rigid wall assumption on evaluation of time-averaged intra-atrial TCPC hemodynamic metric under resting breath-held condition.

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Gao, Jie, Hu Wang, Xiaojun Ding, Qingxiao Yuchi, Qiang Ren, Bo Ning e Junxiang Nan. "The Impact of Microscopic Pore Network Characteristics on Movable Fluid Properties in Tight Oil Reservoir". Geofluids 2023 (14 de novembro de 2023): 1–14. http://dx.doi.org/10.1155/2023/7464640.

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The fluid flow behavior, generally referred to as seepage, could determine the hydrocarbon and brine movement behavior. Movable fluid property, as one of the vital parameters for seepage characteristic evaluation, was generally used for tight oil reservoirs’ fluid flow ability assessment. The nuclear magnetic resonance technique was used to experiment with movable fluid percentage and movable fluid porosity, which can provide a realistic assessment of the amount of fluid that can flow in the porous media. Other techniques were also used to analyze the main factors in regulating the differences in movable fluid parameters. However, the research about fluid flow behavior was generally based on traditional methods, while the seepage characteristics from the pore-scale view are still a myth. To promote this process, in this study, core samples obtained from the Chang 7 reservoir of the Triassic Yanchang Formation in the Longdong region of Ordos Basin, China, were tested. The results show that the average movable fluid percentage and average movable fluid porosity of the total 16 core samples are 36.01% and 2.77%, respectively. The movable fluid exists mainly in the midlarge pores with the corresponding T 2 relaxation time over 10 ms. T 2 distributions mainly present four typical patterns: (1) bimodal distribution with similar amplitudes of the two peaks (occupying 6.25%), (2) bimodal distribution with higher right peak and lower left peak (occupying 18.75%), (3) bimodal distribution with higher left peak and lower right peak (occupying 56.25%), and (4) unimodal distribution (occupying 18.75%). Pore structure heterogeneity is closely related to the movable fluid parameters; the movable fluid parameters exhibit a relatively good correlation with core throat radius as well as permeability. There is an obvious difference between the movable fluid parameters and the microscopic characteristic factors in tight oil reservoirs due to the difference in physical properties, clay mineral content, microcracks, and pore structure characteristics. This research has provided a new perspective for the movable fluid property evaluation, and the relevant results can give some advice for the oil field development.

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Park, S. U., B. J. Gilmore e R. R. Singer. "Simulation of Nonlinear Dynamics of Liquid Filled Fuel Tanker Shell Structure Subjected to Rollover Collision With Validation". Journal of Mechanical Design 120, n.º 4 (1 de dezembro de 1998): 573–80. http://dx.doi.org/10.1115/1.2829317.

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The transport of hazardous materials in truck cargo tanks can cause severe environmental damage as a result of the tank’s failure during a collision. Impact due to collision involves the transient dynamic response of the tank, fluid and their interaction. This paper develops a design oriented computational approach to predict the dynamic transient response of the tank shell structure subjected to impact loads during crash accidents. In order to compute the fluid and structural interaction, the finite element formulations for the added mass to the structure are developed and integrated with DYNA3D, a nonlinear dynamic structural finite element code, and they are validated by pendulum impact experiment. This paper presents the lumping process required by the added mass approach for cargo tanks under impact conditions. Thus, due to its efficiency the computer based approach provides a design tool for fluid filled thin walled structures in general and cargo tanks subjected to an impact situation. The structural performance of cargo tank shell construction is investigated. This research will contribute to improvement in design, modeling, and analysis techniques for crashworthiness and integrity of liquid mechanical structure systems which are subjected to impulsive loads like those found in vehicle collisions.

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Hasanpour, Anis, Denis Istrati e Ian Buckle. "Coupled SPH–FEM Modeling of Tsunami-Borne Large Debris Flow and Impact on Coastal Structures". Journal of Marine Science and Engineering 9, n.º 10 (29 de setembro de 2021): 1068. http://dx.doi.org/10.3390/jmse9101068.

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Field surveys in recent tsunami events document the catastrophic effects of large waterborne debris on coastal infrastructure. Despite the availability of experimental studies, numerical studies investigating these effects are very limited due to the need to simulate different domains (fluid, solid), complex turbulent flows and multi-physics interactions. This study presents a coupled SPH–FEM modeling approach that simulates the fluid with particles, and the flume, the debris and the structure with mesh-based finite elements. The interaction between the fluid and solid bodies is captured via node-to-solid contacts, while the interaction of the debris with the flume and the structure is defined via a two-way segment-based contact. The modeling approach is validated using available large-scale experiments in the literature, in which a restrained shipping container is transported by a tsunami bore inland until it impacts a vertical column. Comparison of the experimental data with the two-dimensional numerical simulations reveals that the SPH–FEM models can predict (i) the non-linear transformation of the tsunami wave as it propagates towards the coast, (ii) the debris–fluid interaction and (iii) the impact on a coastal structure, with reasonable accuracy. Following the validation of the models, a limited investigation was conducted, which demonstrated the generation of significant debris pitching that led to a non-normal impact on the column with a reduced contact area and impact force. While the exact level of debris pitching is highly dependent on the tsunami characteristics and the initial water depth, it could potentially result in a non-linear force–velocity trend that has not been considered to date, highlighting the need for further investigation preferably with three-dimensional models.

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Sauve´, R. G., G. D. Morandin e E. Nadeau. "Impact Simulation of Liquid-Filled Containers Including Fluid-Structure Interaction—Part 2: Experimental Verification". Journal of Pressure Vessel Technology 115, n.º 1 (1 de fevereiro de 1993): 73–79. http://dx.doi.org/10.1115/1.2929498.

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In a number of applications, the hydrodynamic effect of a fluid must be included in the structural evaluation of liquid-filled vessels undergoing transient loading. Prime examples are liquid radioactive waste transportation packages. These packages must demonstrate the ability to withstand severe accidental impact scenarios. A hydrodynamic model of the fluid is developed using a finite element discretization of the momentum equations for a three-dimensional continuum. An inviscid fluid model with an isotropic stress state is considered. A barotropic equation of state, relating volumetric strain to pressure, is used to characterize the fluid behavior. The formulation considers the continuum as a compressible medium only, so that no tension fields are permitted. The numerical technique is incorporated into the existing general-purpose three-dimensional structural computer code H3DMAP. Part 1 of the paper describes the theory and implementation along with comparisons with classical theory. Part 2 describes the experimental validation of the theoretical approach. Excellent correlation between predicted and experimental results is obtained.

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Marimon Giovannetti, Laura, Ali Farousi, Fabian Ebbesson, Alois Thollot, Alex Shiri e Arash Eslamdoost. "Fluid-Structure Interaction of a Foiling Craft". Journal of Marine Science and Engineering 10, n.º 3 (6 de março de 2022): 372. http://dx.doi.org/10.3390/jmse10030372.

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Hydrofoils are a current hot topic in the marine industry both in high performance sailing and in new passenger transport systems in conjunction with electric propulsion. In the sailing community, the largest impact is seen from the America’s cup, where boats are sailed at more than 50 knots (over 100 km/h) with 100% “flying” time. Hydrofoils are also becoming popular in the Olympics, as in the 2024 Olympic games 5 gold medals will be decided on foiling boats/boards. The reason for the increasing popularity of hydrofoils and foiling boats is the recent advances in composite materials, especially in their strength to stiffness ratio. In general, hydrofoils have a very small wetted surface area compared to the wetted surface area of the hull. Therefore, after “take-off” speed, the wetted surface area of the hull, and consequently the resistance of the boat, is reduced considerably. The larger the weight of the boat and crew and the higher the speeds, the greater the loads on the hydrofoils will be. The current research investigates the interaction effects between the fluid and structure of the ZP00682 NACRA 17 Z-foil. The study is carried out both experimentally, in SSPA’s cavitation tunnel, and numerically using a fully coupled viscous solver with a structural analysis tool. The experimental methodology has been used to validate the numerical tools, which in turn are used to reverse engineer the material properties and the internal stiffness of the NACRA 17 foil. The experimental flow speed has been chosen to represent realistic foiling speeds found in the NACRA 17 class, namely 5, 7, and 9 m/s. The forces and the deflection of the Z-foil are investigated, showing a maximum deflection corresponding to 24% of the immersed span. Finally, the effects of leeway and rake angles on the bending properties of the Z-foil are investigated to assess the influence of different angles in sailing strategies, showing that a differential rake set-up might be preferred in search for minimum drag.

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Zhang, Zheng Yang, Yuan Zheng e Xin Zhang. "Modal Analysis Based on Fluid-Structure Interaction of Axial Flow Rotor". Applied Mechanics and Materials 799-800 (outubro de 2015): 565–69. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.565.

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In order to study the impact of prestress and aqueous medium for axial pump flow rotor modal ，in this paper, with a axial flow model test of North Water Diversion Project, the flow of aqueous medium modal distribution of axial flow rotary mechanism was calculated through the coupling APDL command stream in ANSYS WORKBENCH with the basic idea of Fluid-structure interaction，and axial flow changes of impeller modal in aqueous medium and in the air was compared under prestressed case; the load of prestressed modal of the rotation for the entire organization was calculated through the one-way coupling method . The results show that the water medium has a significant decreases to the natural frequency of the impeller, while the impact of the prestress for modal is not obvious.

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Qiaolei, Sun, Xia Le, Liu Yuwei e Deng Long. "Structure design on a new type of coupled impactor". Journal of Physics: Conference Series 2707, n.º 1 (1 de fevereiro de 2024): 012155. http://dx.doi.org/10.1088/1742-6596/2707/1/012155.

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Abstract Improving drilling efficiency and reducing drilling cost are new challenges for deep drilling. Based on this, a coupling impactor is designed by applying the principle of hydraulic pulse pressurization and axial impact. Based on the impactor compression structure and principle, the fluid flow equation of the drilling fluid flowing through the compression mechanism and the mechanical balance equation of the piston body are established in order to study the pressure pulsation characteristics of the coupled impactor fluid.

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Arai, Makoto, e Tatsuya Miyauchi. "Numerical Simulation of the Water Impact on Cylindrical Shells Considering Fluid-structure Interaction". Journal of the Society of Naval Architects of Japan 1997, n.º 182 (1997): 827–35. http://dx.doi.org/10.2534/jjasnaoe1968.1997.182_827.

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Luo, Yuegang, Songhe Zhang, Bin Wu e Wanlei Wang. "Dynamic Analysis on Nonlinear Fluid-Structure Interaction Forces of Rub-Impact Rotor System". Open Mechanical Engineering Journal 8, n.º 1 (24 de dezembro de 2014): 480–86. http://dx.doi.org/10.2174/1874155x01408010480.

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Based on the coupling model of nonlinear oil-film force and nonlinear seal fluid force, a nonlinear dynamic model of rotor system with rub-impact fault is set up. The dynamic characteristics of the system were studied with numerical simulation and the effects of airflow excited force, rubbing gap and stiffness parameters on movement characteristics of the rotor were analyzed. The results indicate that the airflow excited force can significantly restrain the stability and amplitude of rubbing rotor. The less rubbing gap and larger rubbing stiffness are in favor of the stability of the system.

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Yang, Yang, William W. Liou, James Sheng, David Gorsich e Sudhakar Arepally. "Shock wave impact simulation of a vehicle occupant using fluid/structure/dynamics interactions". International Journal of Impact Engineering 52 (fevereiro de 2013): 11–22. http://dx.doi.org/10.1016/j.ijimpeng.2012.09.002.

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Anghileri, Marco, Luigi-M. L. Castelletti e Maurizio Tirelli. "Fluid–structure interaction of water filled tanks during the impact with the ground". International Journal of Impact Engineering 31, n.º 3 (março de 2005): 235–54. http://dx.doi.org/10.1016/j.ijimpeng.2003.12.005.

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Zhang, Guanyu, Xiang Chen e Decheng Wan. "MPS-FEM Coupled Method for Study of Wave-Structure Interaction". Journal of Marine Science and Application 18, n.º 4 (15 de outubro de 2019): 387–99. http://dx.doi.org/10.1007/s11804-019-00105-6.

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Abstract Nowadays, an increasing number of ships and marine structures are manufactured and inevitably operated in rough sea. As a result, some phenomena related to the violent fluid-elastic structure interactions (e.g., hydrodynamic slamming on marine vessels, tsunami impact on onshore structures, and sloshing in liquid containers) have aroused huge challenges to ocean engineering fields. In this paper, the moving particle semi-implicit (MPS) method and finite element method (FEM) coupled method is proposed for use in numerical investigations of the interaction between a regular wave and a horizontal suspended structure. The fluid domain calculated by the MPS method is dispersed into fluid particles, and the structure domain solved by the FEM method is dispersed into beam elements. The generation of the 2D regular wave is firstly conducted, and convergence verification is performed to determine appropriate particle spacing for the simulation. Next, the regular wave interacting with a rigid structure is initially performed and verified through the comparison with the laboratory experiments. By verification, the MPS-FEM coupled method can be applied to fluid-structure interaction (FSI) problems with waves. On this basis, taking the flexibility of structure into consideration, the elastic dynamic response of the structure subjected to the wave slamming is investigated, including the evolutions of the free surface, the variation of the wave impact pressures, the velocity distribution, and the structural deformation response. By comparison with the rigid case, the effects of the structural flexibility on wave-elastic structure interaction can be obtained.

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Kuchumov, Alex G., Anastasiya Makashova, Sergey Vladimirov, Vsevolod Borodin e Anna Dokuchaeva. "Fluid–Structure Interaction Aortic Valve Surgery Simulation: A Review". Fluids 8, n.º 11 (4 de novembro de 2023): 295. http://dx.doi.org/10.3390/fluids8110295.

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The complicated interaction between a fluid flow and a deformable structure is referred to as fluid–structure interaction (FSI). FSI plays a crucial role in the functioning of the aortic valve. Blood exerts stresses on the leaflets as it passes through the opening or shutting valve, causing them to distort and vibrate. The pressure, velocity, and turbulence of the fluid flow have an impact on these deformations and vibrations. Designing artificial valves, diagnosing and predicting valve failure, and improving surgical and interventional treatments all require the understanding and modeling of FSI in aortic valve dynamics. The most popular techniques for simulating and analyzing FSI in aortic valves are computational fluid dynamics (CFD) and finite element analysis (FEA). By studying the relationship between fluid flow and valve deformations, researchers and doctors can gain knowledge about the functioning of valves and possible pathological diseases. Overall, FSI is a complicated phenomenon that has a great impact on how well the aortic valve works. Aortic valve diseases and disorders can be better identified, treated, and managed by comprehending and mimicking this relationship. This article provides a literature review that compiles valve reconstruction methods from 1952 to the present, as well as FSI modeling techniques that can help advance valve reconstruction. The Scopus, PubMed, and ScienceDirect databases were used in the literature search and were structured into several categories. By utilizing FSI modeling, surgeons, researchers, and engineers can predict the behavior of the aortic valve before, during, and after surgery. This predictive capability can contribute to improved surgical planning, as it provides valuable insights into hemodynamic parameters such as blood flow patterns, pressure distributions, and stress analysis. Additionally, FSI modeling can aid in the evaluation of different treatment options and surgical techniques, allowing for the assessment of potential complications and the optimization of surgical outcomes. It can also provide valuable information on the long-term durability and functionality of prosthetic valves. In summary, fluid–structure interaction modeling is an effective tool for predicting the outcomes of aortic valve surgery. It can provide valuable insights into hemodynamic parameters and aid in surgical planning, treatment evaluation, and the optimization of surgical outcomes.

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Łojek, Paweł, Ireneusz Czajka e Andrzej Gołaś. "Numerical Study of the Impact of Fluid–Structure Interaction on Flow Noise over a Rectangular Cavity". Energies 15, n.º 21 (28 de outubro de 2022): 8017. http://dx.doi.org/10.3390/en15218017.

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Fluid–structure interactions (FSI) can significantly affect flow and the acoustic field generated by it. In this article, simulations of the flow over a rectangular cavity are conducted with and without taking FSI into account. The aim of this research is to conduct a numerical study of the flow over a cavity and to verify whether interactions between the flow and the elastic structure can significantly affect the flow itself or the acoustic pressure field. Four cases involving flexible walls with different material parameters and one reference case with rigid walls were analysed. The two-directional fluid–structure coupling between the flow and cavity walls was simulated. The simulations were performed with the volume and finite element methods using OpenFOAM software to solve the fluid field, CalculiX software to solve the displacement of the structure, and the preCICE library to couple the codes and computed fields. The acoustic analogy of Ffowcs-Williams and Hawkings and the libAcoustics library were used to calculate the sound pressure. The simulation results showed that FSI has a significant influence on sound pressure in terms of both pressure amplitudes and levels as well as in terms of noise frequency composition. There was a significant increase in the sound pressure compared to the case with rigid walls, especially for frequencies above 1 kHz. The frequencies at which this occurred are related to the natural frequencies of the cavity walls and the Rossiter frequencies. Overlap of these frequencies may lead to an increase in noise and structural vibrations, which was observed for one of the materials used. This study may provide insight into the flow noise generation mechanism when fluid–structure interactions are taken into account. The conclusions presented here can form a basis for further work on aerodynamic noise in the presence of thin-walled structures.

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XIE, WENFENG, TIEGANG LIU e YIN-LU YOUNG. "THE EFFECT OF SURFACE CURVATURE ON UNDEX-INDUCED HULL CAVITATION". Modern Physics Letters B 23, n.º 03 (30 de janeiro de 2009): 253–56. http://dx.doi.org/10.1142/s0217984909018138.

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Hull cavitation evolution induced by an underwater explosion (UNDEX) near a deformable steel structure is numerically investigated using a multiphase compressible fluid solver1-3 coupled with an unsteady one-fluid cavitation model4,5. A series of computations are conducted with varying structure surface curvature. Results suggest that structure surface curvature influence the peak pressures generated from the shock impact and cavitation collapse; a concave-designed surface not only causes local shock focus but also enhances the subsequent cavitation reload.

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Xu, Chengliang, e Feng Xu. "Fluid-structure interaction dynamic analysis of large civil aircraft tank sloshing". Journal of Physics: Conference Series 2756, n.º 1 (1 de maio de 2024): 012038. http://dx.doi.org/10.1088/1742-6596/2756/1/012038.

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Abstract To meet the requirements of passengers, the tank volume of large civil aircraft is gradually increasing, which brings certain risks. Under different 0 pertaining conditions during the flight, the liquid in the tank will cause structural failure and affect the aircraft’s safety. Therefore, based on the assumption of an ideal fluid, the smooth particle method (SPH) combined with the finite element method (FEM) is used to establish the coupling dynamic equation between the tank and the liquid. The effects of sloshing impact on the water tank under different filling rates were studied, and the influences of the water wave shape, the center of gravity shift, stress distribution, and deformation of the tank were obtained. The results show that the mass accumulation of water particles occurs in the acceleration stage, the relative center of gravity changes greatly in less water, and the accumulated liquid greatly influences the tank under the action of inertia. The more liquid in the tank is, the more the impact effect on the tank increases. The analysis results provide some reference for the analysis and design of tank anti-sway plates and flight attitude adjustment.

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