Tesis sobre el tema "Fluid-Structure impact"
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Song, B. "Fluid/structure impact with air cavity effect". Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1469187/.
Texto completoZekri, H. J. "The influence of gravity on fluid-structure impact". Thesis, University of East Anglia, 2016. https://ueaeprints.uea.ac.uk/59670/.
Texto completoConner, Ryan P. "Fluid Structure Interaction Effects on Composites Under Low Velocity Impact". Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/7324.
Texto completoMessahel, Ramzi. "ALE and SPH formulations for Fluid Structure Interaction : shock waves impact". Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10022/document.
Texto completoThis thesis focuses on the numerical study of the propagation of shock waves in compressible multiphase flows and fluid structure interaction. Two approaches are being studied for the numerical solution of the fluid part: the ALE approach (Arbitrary Lagrangian Eulerian) and the Lagrangian SPH (Smoothed Particle Hydrodynamics) approach; while the structure part is solved by a conventional FE (Finite Element). The numerical investigation of the ALE and SPH methods are the two main areas of research.Water Hammers phenomena occuring in nuclear industries are investigated in this thesis. During a Water Hammer, the shock waves reflections in nuclear piping may drop locally the water pressure below its saturation pressure and generate cavitation. The three equations HEM (Homogeneous Equilibrium Model) phase change model proposed by Saurel et al. (1999) is studied and applied to solve water hammers. The obtained results are compared with experimental data. Despite the use of renormalization techniques in SPH, instabilities (numerical oscillations) are developed at the interface between particles from different materials. These instabilities restrict the use of traditional SPH schemes to problems with low density ratio. In order to solve the shock problems in the compressible regime, the scheme originally proposed by Hu and Adams (2006) is adapted to fully compressible regime (FC-SPH) by considering the coupling between the density and the smoothing length. The different SPH schemes are compared for 1-D and 2-D multiphase shock problems. Validation is performed in comparison with exact solutions for 1-D problems and ALE solution for 2-D problems
Hendry, Stephen R. "Projectile impact of fluid backed metal beams and plates : experiments and numerical simulation". Thesis, University of Aberdeen, 1985. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU356814.
Texto completoMcCrillis, Ryan D. "Dynamic failure of sandwich beams with fluid-structure interaction under impact loading". Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5101.
Texto completoThe objective of this research is to examine the added mass effect that water has on the dynamic response of a sandwich composite under impact, particularly impact leading to failure. Because sandwich composites are much less dense than water, fluid structure interaction plays a large part in the failure. Composite samples were constructed using vacuum assisted transfer molding, with a 6.35 mm balsa core and symmetrical plain weave 6 oz E-glass skins. The experiment consisted of three phases. First, using threepoint bending, strain rate characteristics were examined both in air and under water. After establishing that the medium had no effect on the beam response under different strain rates, but confirming that previously established relationships between strain rate and ultimate strength for axially loaded glass composites can be applies to sandwich construction in bending, the experiment progressed to impact testing where each specimen, again a one inch wide beam, was subjected to progressively increasing force. The data from this phase showed that submerged samples failed at lower drop heights and lower peak forces with a failure mode dominated by center span skin compression failure. Beams in air were able to withstand higher drop heights and peak forces. Dry sample failure mode was dominated by skin compression failure at the clamped support with occasional evidence of shear failure through the core adjacent to the clamped support. The data from this study will increase understanding of sandwich composite characteristics subjected to underwater impact.
Lee, June. "Hydro-impact, fluid-structure interaction and structural response of modern racing yacht". Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/142787/.
Texto completoOwens, Angela C. "An experimental study of fluid structure interaction of carbon composites under low velocity impact". Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FOwens.pdf.
Texto completoThesis Advisor: Kwon, Young W. Second Reader: Didoszak, Jarema M. "December 2009." Description based on title screen as viewed on January 26, 2010. Author(s) subject terms: Composite, Carbon, Low Velocity Impact, Fluid Structure Interaction. Includes bibliographical references (p. 49-50). Also available in print.
Berkane, Belaid. "Etudes expérimentales de l'influence de l'aératiοn sur les impacts hydrοdynamiques : deux cοnfiguratiοns idéalisées avec présence de pοches d'air et de bulles". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH04.
Texto completoHydrodynamic impacts between solid structures and liquids play a crucial role in various strategic fields such as coastal engineering, aeronautics, and renewable energy. This thesis focuses on the less explored effect of aeration, where the presence of air in the form of bubbles or air pockets significantly alters impact forces and hydrodynamic responses. The central objective of this thesis is to deepen our understanding of aeration's effects on complex hydrodynamic impact dynamics. This research concentrates on two distinct experimental setups: the impact of a flat plate on a calm water surface and the impact of an aerated water jet on a flat plate. The challenge is to examine how aeration influences impact pressures and post-impact oscillation frequencies. To achieve these objectives, experimental setups were designed for each case study. These model experiments allow us to precisely control crucial parameters such as impact velocity, plate dimensions, ambient pressure, etc. Special attention was also given to measuring aeration rates and impact pressures, enabling rigorous analysis of the results. For the plate impact, observations showed that maximum impact pressures and pressure impulses deviate from the von Karman theory, mainly due to the damping effect of air. Reducing ambient pressure increases impact pressures, suggesting a reduction of the air cushion effect. Regarding the impact of an aerated water jet, a diversity of flow regimes, such as bubble, slug, churn, and annular flows, were identified. The interaction between the number of injectors, air pressure, and bubble characteristics demonstrates a significant interdependence. The effects of aeration on impact pressures and oscillation frequencies show that larger structures induce slower oscillations and increased dimensionless pressures
Abdolmaleki, Kourosh. "Modelling of wave impact on offshore structures". University of Western Australia. School of Mechanical Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0055.
Texto completoChacon, Rene y Monika Ivantysynova. "An Investigation of the Impact of the Elastic Deformation of the End case/Housing on Axial Piston Machines Cylinder Block/Valve Plate Lubricating Interface". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199578.
Texto completoGhaleb, Marie-Josèphe. "Vibrations d'une plaque élastique infinie couplée avec un fluide sous l'effet d'un impact ponctuel". Grenoble 1, 1987. http://www.theses.fr/1987GRE10150.
Texto completoMohd, Thiyahuddin Mohd Izzat. "Experimental and numerical characteristics of portable water-filled road safety barrier system under different impact conditions". Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/71458/1/Mohd%20Izzat_Mohd%20Thiyahuddin_Thesis.pdf.
Texto completoStenius, Ivan. "Finite element modelling of hydroelasticity in hull-water impacts". Licentiate thesis, KTH, Aeronautical and Vehicle Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4304.
Texto completoThe work in this thesis focuses on the use of explicit finite element analysis (FEA) in the modelling of fluid-structure interaction of panel-water impacts. Paper A, considers modelling of a two-dimensional rigid wedge impacting a calm water surface. From analytical methods and results of a systematic parameter study a generalised approach for determination of fluid discretization and contact parameters in the modelling of arbitrary hull-water impact situations is developed and presented. In paper B the finite element modelling methodology suggested in paper A is evaluated for elastic structures by a convergence study of structural response and hydrodynamic load. The structural hydroelastic response is systematically studied by a number of FE-simulations of different impact situations concerning panel deadrise, impact velocity and boundary conditions. In paper B a tentative method for dynamic characterization is also derived. The results are compared with other published results concerning hydroelasticity in panel water impacts. The long-term goal of this work is to develop design criteria, by which it can be determined whether the loading situation of a certain vessel type should be regarded as quasi-static or dynamic, and which consequence on the design a dynamic loading has.
Kingsley, Thomas Charles. "Multidisciplinary design and optimisation of liquid containers for sloshing and impact". Diss., Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-01242006-100142.
Texto completoBrandely, Anaïs. "Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale". Thesis, Compiègne, 2016. http://www.theses.fr/2016COMP2274/document.
Texto completoThe present thesis focuses on an investigation of the sloshing phenomenon in a partially filled fuel tank submitted to a harmonic excitation motion. In the first part, the confrontation of numerical results between a linear approach - taking into account viscosity - and a nonlinear approach based on a commercial code leads to define a parameter of linearity. This parameter allows determining cases of sloshing who require non-linear resolution and those who need a linear theory to predict the phenomenon. An experimental study of fluid sloshing in a rectangular tank submitted to an automotive braking is conducted. Tests leaded allow measuring global forces engendered by the motion of the fluid, pressure of fluid impact and velocity field by PIV. This chapter provides an important data base and helps to investigate on the physical phenomenon. This study is completed by CFD results. To conclude, a numerical model for fluid-structure interactions is presented. Limits of this segregated partitioned coupling in case of sloshing in tank flexibly attached are highlighted, depending mostly on the mass ratio between fluid and tank structure. An added-mass term is integrated to the corrected staggered scheme ensuring systematically the convergence of the coupled solution and reducing significantly the iterations required
Fortes-Patella, Regiane. "Analyse de l'érosion de cavitation par simulations numériques d'impacts". Grenoble INPG, 1994. http://www.theses.fr/1994INPG0018.
Texto completoGoel, Ashish. "Dynamic loading of structures by high speed granular media". Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277444.
Texto completoVerš, Evelin. "Development of impact-induced hydrothermal system at Kärdla impact structure /". Tartu, Estonia : Tartu University Press, 2006. http://dspace.utlib.ee/dspace/bitstream/10062/187/1/verzevelin.pdf.
Texto completoKonzen, Graydon Leo. "Regional-Scale Impacts of Fluid Composition and Geologic Structure for Injection-Induced Seismicity in the Southern U.S. Midcontinent". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99107.
Texto completoMaster of Science
Increased earthquake activity in Oklahoma and Kansas over the last decade is linked waste disposal related to hydrofracking. Oil and gas produced in the fracking process is often mixed with large amounts of water that is too salty to be used for public or industrial purposes, thus this water is disposed of via injection into deep rock layers in the upper portion of the Earth's interior, or crust. This injection disturbs the crust to trigger earthquakes where none have been historically observed. Previous studies examining this phenomenon assume that the rock layers of the crust lie flat and level; simplify the nature of major faults, or cracks, in the crust; and do not consider differences in water chemistry between injected water and water that already occupies the crust. The study developed in this thesis considers the effect of these three factors with regard to how they influence the extent of the linkage between waste water injection and earthquakes in Oklahoma and Kansas.
Fillon, Blandine. "Développement d'un outil statistique pour évaluer les charges maximales subies par l'isolation d'une cuve de méthanier au cours de sa période d'exploitation". Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2337/document.
Texto completoThis thesis focuses on statistical tools for the assessment of maxima sloshing loads in LNG tanks. According to ship features, tank cargo and sailing conditions, a sloshing phenomenon is observed inside LNG tanks. The determination of sloshing loads supported by the tank structure is derived from impact pressure measurements performed on a test rig. Pressure maxima per impact, extracted from test measurements, are investigated. Test duration is equivalent to 5 hours in full scale. This duration is not sufficient to determine pressure maxima associated with high return periods (40 years). It is necessary to use a probabilistic model in order to extrapolate pressure maxima. Usually, a Weibull model is used. As we focus on extreme values from samples, fittings are also performed with the generalized extreme value distribution and the generalized Pareto distribution using block maximum method and peaks over threshold method.The originality of this work is based on the use of an alternate measurement system which is more relevant than usual measurement system to get pressure maxima and a 480 hours measured data available for same test conditions. This provides a reference distribution for pressure maxima which is used to assess the relevance of the selected probabilistic models. Particular attention is paid to the assessment of fittings quality using statistical tests and to the quantification of uncertainties on estimated values.The provided methodology has been implemented in a software called Stat_R which makes the manipulation and the treatment of results easier
Panda, Bimal Prasad y Aakash Deep Singhal. "Modelling & Simulation of Fluid Flow Behaviour During Carbondioxide Sequestration in Coal Structure Using Comsol Multiphysics". Thesis, 2015. http://ethesis.nitrkl.ac.in/7831/1/2015_MT_Modeling_PANDA.pdf.
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