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Auswahl der wissenschaftlichen Literatur zum Thema „Oil-structure interaction“
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Zeitschriftenartikel zum Thema "Oil-structure interaction"
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Amini, Azin, Maziar Mahzari, Erik Bollaert und Anton Schleiss. „FLUID-STRUCTURE INTERACTION ANALYSIS APPLIED TO OIL CONTAINMENT BOOMS“. International Oil Spill Conference Proceedings 2005, Nr. 1 (01.05.2005): 585–88. http://dx.doi.org/10.7901/2169-3358-2005-1-585.
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ABSTRACT The most important aspect of the ongoing research project is to develop numerical coupled hydraulic-structural analysis models of oil containment booms. This should be later applicable for investigation of the efficiency limits of a new system of oil spill containment booms called Cavalli system. This system consists of surrounding the oil slick with a special boom and protecting it against waves and currents. It provides the possibility to divide the encircled area in several smaller circles and to increase the thickness of the oil slick inside. The whole system consists of a two-phase fluid (oil and water) and a boom that should be structurally stable for the pressure loads imposed by the fluids. It is finally important to evaluate the behaviour of the flexible skirt under different wave and current conditions, as almost all of existing research in the field have been undertaken for rigid barriers. To assess the behaviour of a flexible barrier fluid-structure interaction analysis is to be conducted. The problem is considered as a fluid-structure interaction problem as the boom usually undergoes large deformations and rotations, which modifies the flow characteristics during operation that is not the case for a rigid boom.
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Chen, Jie, Neng Xi, Jia Jun Yang und Mei Ling Zhao. „Squeeze Oil-Film Fluid-Structure Interaction Analysis by the Finite Element Method“. Applied Mechanics and Materials 401-403 (September 2013): 446–49. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.446.
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The squeeze oil-film dampers have been applied to damp out vibration in linear guideway systems of CNC machine tools. An accurate estimate of squeeze oil-film damping effects is significant to predict the dynamic performance of rolling guidance systems. This paper presents a finite element method to solve the fluid-structure interaction problem of squeeze oil-film dampers. Three-node Mindlin plate element is used in the structure domain model. The oil-film behavior is provided by the Reynolds equation of lubrication theory. Both the structural domain and fluid domains are discretized by finite element method. The frequency response functions of coupled systems are derived by considering the oil-film pressures and the structure displacements on the boundary as the coupling conditions. The validity of the frequency response functions is verified by a simple example. It shows that the oil-film thickness has significant influence on the frequency response.
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Fuglem, Mark, Ian Jordaan und Greg Crocker. „Iceberg – structure interaction probabilities for design“. Canadian Journal of Civil Engineering 23, Nr. 1 (01.02.1996): 231–41. http://dx.doi.org/10.1139/l96-024.
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When designing systems to operate in regions through which icebergs travel, one of the first inputs of interest is the expected numbers of encounters with icebergs. In this paper, geometric solutions are presented for a cylindrical gravity-based structure, a floating production vessel, and a cargo vessel. The required inputs are the average areal density of icebergs, the average iceberg water line length, and the average iceberg drift velocity. Example calculations are presented for the Grand Banks region off Canada's east coast. Key words: iceberg, encounter, probability, risk, design, oil, production, Grand Banks, structure, tanker.
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Yue, Hong Yuan, Jian Yun Chen und Qiang Xu. „Dynamic analysis of 1100 kV composite bushing considering oil and structure interaction effects“. MATEC Web of Conferences 272 (2019): 01011. http://dx.doi.org/10.1051/matecconf/201927201011.
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The 1100 kV composite bushing is one of the most important components in the ultra-high voltage electrical network. Therefore, the safety and integrity must be ensured during the operation under any conditions such as an earthquake. The primary object of this paper is to investigate the effects of oil in the dome on the dynamic responses of the 1100 kV composite bushing when subjected to horizontal seismic ground motion. The coupled finite element method (FEM) and smoothed particle hydrodynamics (SPH) method is adopted to simulate the fluid structure interaction (FSI) between the oil and the dome. The influences of particle’s distributions on the numerical results and computational efficiencies are discussed. For comparison with the coupled FEM/SPH method, the additional mass model is also performed. The influences of oil oscillation on the time history of absolute acceleration of 1100 kV composite bushing are discussed, as well as the relative displacement and the bending moment at the base of the structure. The results show that the motion of oil in the dome with free surface can limit the vibration of the 1100 kV composite bushing and can efficiently dissipate the kinetic energy of the 1100 kV composite bushing by fluid-structure interaction.
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Yin, Yao, und Yiliang Liu. „FEM Analysis of Fluid-Structure Interaction in Thermal Heavy Oil Recovery Operations“. Sustainability 7, Nr. 4 (08.04.2015): 4035–48. http://dx.doi.org/10.3390/su7044035.
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Guimarães, Murilo Menck, Camila Silveira Souza, Maria Rosângela Sigrist, Karina Back Militão Miliato und Fabiano Rodrigo da Maia. „Assessment of interactions between oil flowers and floral visitors in world biomes“. Biological Journal of the Linnean Society 134, Nr. 2 (18.06.2021): 366–80. http://dx.doi.org/10.1093/biolinnean/blab078.
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Abstract Specialized glands that produce and store floral oil are found in 11 families of flowering plants, with greater representation in Malpighiaceae. Solitary bees use this resource to feed larvae and for cell lining. Oil interactions have been reported mainly at the population level and in some community studies that have commonly ignored not only the fewer representative families of oil-offering flowers, but also the floral visitors that do not collect floral oil. We have compiled and examined the interactions between oil-offering flowers and floral visitors in world biomes, to describe the structural patterns of the oil interaction meta-network and evaluate the species' functional roles. We reviewed 169 studies, which mainly used a phytocentric approach, reporting 1460 interactions between 214 species of oil-offering flowers and 377 species of floral visitors. Malpighiaceae and bees (mainly oil-collecting bees) were the most frequently investigated. The meta-network of oil interactions showed a modular structure, mainly influenced by botanical families, and core–periphery organization. The most important functional roles were associated with Malpighiaceae and oil-collecting bees, possibly due to their representativeness and geographic distribution.
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장병춘 und 양동욱. „A Study on Fluid Structure Interaction Analysis of the Power-steering Oil Tank“. Journal of the Korean Society of Mechanical Technology 18, Nr. 2 (April 2016): 171–76. http://dx.doi.org/10.17958/ksmt.18.2.201604.171.
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Adeeb M und Sunil Shaw. „Frankincense essential oil extraction and lead compound analysis into cancer cells using molecular docking“. International Journal of Research in Pharmaceutical Sciences 11, Nr. 1 (07.02.2020): 1080–84. http://dx.doi.org/10.26452/ijrps.v11i1.1939.
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Oil was extracted from Frankincense (Boswellia Sacra) by the soxhlet extraction method and various bioactive compounds were identified using gas chromatography (GC).These compounds can be developed as active pharmacophores.The present study involves the extraction and identification of bioactive compounds and their in-vitro study on the interaction of these compounds to target proteins. Frankincense oil collected from Boswelia Sacra species was subjected to Soxhlet extraction using Hexane solvent and essential oil (EO) was separated using vacuum distillation. Chemical profiling of essential oil was done using GC-MS. Various biological databases like PubChem, Protein Data Bank and software like Argus Lab, Rasmol were used to retrieve and analyze the structural and molecular interactions of bioactive compounds from Frankincense oil with receptor proteins. The target protein structure was retrieved from Protein data bank ligand structures that were downloaded from Pubchem, which was visualized using Rasmol Software. Protein-ligand interaction was studied using Argus Lab software by docking simulations and various docking poses were analyzed.The energy values of docking conformations were analyzed for obtaining the best docking pose & score.
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Li, Zhi Xin, Shi Ming Ji, Xun Lv, Si Chang Xiong, Shen Shun Ying und Yang Yu Wang. „Numerical Prediction of Manufacturing Error in Sliding Panel Structure“. Advanced Materials Research 102-104 (März 2010): 675–80. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.675.
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The present work focuses on the numerical prediction of the manufacture quality of a sliding panel structure, in which the mobile components are floating on the immobile components and the 0.002mm thickness oil-film clearance between the mobile and immobile components. The interaction between them is the interfacial coupling interaction. A single-point spring-damping supporting element is introduced to simulate this type of interaction traditionally, in which the torsion of the mobile components is increasing with the supporting element reduced. To analogy the interfacial coupling interaction, the finite centrality supporting method is introduced to study the thin oil-film effect between the mobile and immobile components. And the manufacturing quality is predicting through the numerical study. Compared with the results derived from the numerical and experiments, the manufacturing error is in accordance with each other.
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Tahir, Muhammad, Rafael E. Hincapie, Calvin L. Gaol, Stefanie Säfken und Leonhard Ganzer. „Flow Dynamics of Sulfate-Modified Water/Polymer Flooding in Micromodels with Modified Wettability“. Applied Sciences 10, Nr. 9 (07.05.2020): 3239. http://dx.doi.org/10.3390/app10093239.
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This work describes the flow behavior of the oil recovery obtained by the injection of sulfate-modified/low-salinity water in micromodels with different wettabilities. It provides a detailed microscopic visualization of the displacement taking place during modified water flooding at a pore-scale level, while evaluating the effect of wettability on oil recovery. A comprehensive workflow for the evaluation is proposed that includes fluid–fluid and rock–fluid interactions. The methods studied comprise flooding experiments with micromodels. Artificial and real structure water-wet micromodels are used to understand flow behavior and oil recovery. Subsequently, water-wet, complex-wet, and oil-wet micromodels help understand wettability and rock–fluid interaction. The effect of the sulfate content present in the brine is a key variable in this work. The results of micromodel experiments conducted in this work indicate that sulfate-modified water flooding performs better in mixed-wet/oil-wet (artificial structure) than in water-wet systems. This slightly differs from observations of core flood experiments, where oil-wet conditions provided better process efficiency. As an overall result, sulfate-modified water flooding recovered more oil than SSW injection in oil-wet and complex-wet systems compared to water-wet systems.
Dissertationen zum Thema "Oil-structure interaction"
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Ticona, A. M., M. A. Rosales und J. D. Orihuela. „Correction coefficients of distortion and vibration period for buildings due to soil-structure interaction“. OP Publishing Ltd, 2020. http://hdl.handle.net/10757/656571.
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The present research analyzed the influence of the soil structure interaction (SSI) in buildings, varying geotechnical parameters and height, considering 3 international codes. The responses obtained from the structures taking into account the SSI, were compared with the responses of fixed-base buildings, being the main control variables: the period and the drift. It was determined that the estimated range in which the period of the structure increases is from 30 to 98%, demonstrating the influence of considering soil flexibility. Due to the variability of the responses obtained, an adjustment factor is proposed to predict said amplification of the control variables, depending on the height of the building and the ground.
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Rebufa, Jocelyn. „Vibrations de ligne d'arbre sur paliers hydrodynamiques : influence de l'état de surface“. Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC044/document.
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Le palier hydrodynamique est une solution de guidage en rotation particulièrement appréciée pour ses caractéristiques d’amortissement à hautes vitesses de rotation. Cependant les performances des machines tournantes lubrifiées par un film fluide sont impactées par des effets non linéaires difficiles à analyser. La prédiction du comportement du système par la simulation nécessite une modélisation avancée de l’écoulement de lubrifiant dans le palier hydrodynamique. Enfin, l’état de surface semble avoir un impact important sur l’écoulement du fluide lubrifiant, lui-même agissant sur les caractéristiques statiques et dynamiques des parties tournantes. Cette étude vise à améliorer les modèles numériques liés à l’impact de l’état de surface des paliers hydrodynamiques sur la dynamique de ligne d’arbre. La méthode d’homogénéisation multi-échelles a été utilisée à cet effet dans un algorithme multi-physiques pour décrire l’interaction entre la structure flexible en rotation et les films fluides des supports de lubrification. Différents modèles ont été utilisés pour prendre en compte la présence de zone de rupture de film lubrifiant. Des méthodologies non-linéaires fréquentielles ont été mises en place afin de permettre l’étude paramétrique des solutions périodiques d’un tel système et de leur stabilité. Afin de confronter ce modèle complexe à la réalité, un banc d’essai miniature a également été conçu. Différents échantillons présentant des états de surface modifiés par ablation à l’aide de LASER femto-seconde ont été testés. L’étude expérimentale a permis de vérifier certaines tendances prévues par la simulation. Des améliorations des performances des paliers hydrodynamiques par rapport aux vibrations auto-entretenues du système ont été démontrées pour certaines textures. En revanche toutes les améliorations ne sont pas prédites par les algorithmes d’homogénéisation multi-échelles. La présence de recirculation dans les aspérités du motif a été mise en évidence à partir de la résolution locale des équations de Navier-Stokes. Ce résultat participe à la remise en question des hypothèses classiques utilisées en texturation, et peut justifier les améliorations obtenues expérimentalement avec les paliers texturésThe hydrodynamic bearing provides good damping properties in rotating machineries. However, the performances of rotor-bearings systems are highly impacted by nonlinear effects that are difficult to analyze. The rotordynamics prediction requires advanced models for the flow in the bearings. The surface of the bearings seems to have a strong impact on the lubricant flow, acting on the static and dynamic properties of the rotating parts. This study aims to enhance the simulation of the bearings’ surface state effect on the motion of the rotating shaft. The flexible shaft interacts with textured hydrodynamic bearings. Multi-scales homogenization is used in a multi-physics algorithm in order to describe the fluid-structure interaction. Different models are used to account for the cavitation phenomenon in the bearings. Nonlinear harmonic methods allow efficient parametric studies of periodic solutions as well as their stability. Moreover, a test rig has been designed to compare predictions to real measurements. Several textured shaft samples modified with femto-seconds LASER surface texturing are tested. In most cases the experimental study showed similar results than the simulation. Enhancements of the vibration behaviors of the rotor-bearing system have been revealed for certain texturing patterns. The self-excited vibration, also known as "oil whirl" phenomenon, is stabilized on a wide rotating frequency range. However, the simulation tool does not predict well the enhancements that are observed. Vortices in surface texturing patterns have been revealed numerically with Navier-Stokes equation resolution. These results are opposed to the classical lubrication hypothesis. It is also a possible explanation of the enhancements that are experimentally measured with textured bearings
Bücher zum Thema "Oil-structure interaction"
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Special Offshore Symposium China (1994 Beijing, China). The proceedings of the Special Offshore Symposium China: China/Asia offshore developments, offshore and shallow water oil/gas developments, structure analysis, hydrodynamics, fluid-structure interaction and ice. Golden, Colo: International Society of Offshore and Polar Engineers, 1994.
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Braginsky, O. B., G. M. Tatevosyan, S. V. Sedova und R. Sh Magomedov. The economic mechanism of development programs: the interaction of economic instruments. CEMI RAS, 2020. http://dx.doi.org/10.33276/978-5-8211-0787-9.
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The preprint presents the economic mechanism of investment programs and analyzes its components: specific indicators for evaluating the investment part of developmental programs are proposed; a specific pricing for products manufactured as a result of the implementation of investment projects; a system of financing developmental programs based on the optimal ratio of budget funds, reinvested profits and credit. The empirical base of the study is made up of materials from the petrochemical complex. In this regard, the world trends in the development of petrochemical chemistry and the situation in the petrochemical complex of Russia are considered. Recommendations are given regarding the development of the petrochemical industry of Russia. A multi-criteria optimization model that implements the presented economic mechanism and is intended to form variants of the structure of the governmental program for industrial and regional (territorial) development is developed. The results of a computer experiment are presented. Variants of a conditional program for the development of the Russian oil and gas chemical complex showing the positive impact of the proposed economic mechanism on the structure and indicators of the program are developed.
Buchteile zum Thema "Oil-structure interaction"
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Aveyard, Bob. „Oil and water do not mix—hydrophobic hydration“. In Surfactants, 17–24. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198828600.003.0002.
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Many surfactants contain hydrocarbon moieties that are removed from their aqueous environment (‘dehydrated’) in, for example, adsorption and micelle formation. Hydrophobic hydration relates to the interactions between individual nonpolar solute molecules and water, and can be probed using thermodynamic quantities for the dissolution of dilute hydrocarbon vapours to form dilute aqueous solutions. Contrary to the simple expectation that the entropy of hydration of a nonpolar moiety should be positive (due to disruption of water structure), it is large and negative, giving a large positive contribution to the free energy of hydration. The hydration of nonpolar molecules in water leads to an attraction between the molecules in close proximity, which is termed hydrophobic bonding. Although the free energy of hydration of nonpolar groups in bulk aqueous solution is positive, the interaction free energy of nonpolar molecules/groups with interfacial water at an air/water interface is negative.
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Gill, D., und M. Levinger. „Information Management And Mapping System For Subsurface Stratigraphic Analysis“. In Computers in Geology - 25 Years of Progress. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195085938.003.0014.
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An information management and mapping system combining a series of interactive computer programs for stratigraphic, lithofacies, paleogeographic, and structural analysis interfaced with a comprehensive database on subsurface geology produces contour maps of quantitative variables including structure maps, isopach maps, and maps of lithofacies parameters; detailed lithologic and stratigraphic logs; and printouts of lithofacies parameters for all levels of the lithostratigraphic subdivision. Users communicate by means of simple, on-screen, menu-driven dialogues controlled by FORTRAN programs. The system runs on DEC/Micro VAX II computers operating under VMS. This information management and mapping system for subsurface stratigraphic analysis is an integration of a comprehensive database on the subsurface geology of Israel and a series of computer programs for stratigraphic, lithofacies, paleogeographic, and structural analysis. Development of the system, referred to as "ATLAS -RELIANT," was sponsored by OEIL [Israel Oil Exploration (Investment) Ltd.). The system serves primarily as a storage and retrieval facility for information on the subsurface geology of Israel. Users can obtain printouts of lithologic and stratigraphic logs, contour maps, and value maps. The system originally was developed to run on a CDC machine under the NOS/BE operating system. Later OEIL expanded the database to include many additional items of information [inventory of cores and petrophysical logs, results of production tests, results of petrophysical analyses, geochemical analyses of recovered fluids (water samples and hydrocarbons), and results of quantitative analyses of petrophysical logs] and the system was modified to run on DEC/Micro VAX II computers under the VMS operating system (Shertok, 1969). Among other things, the ATLAS-RELIANT system was instrumental in the regional stratigraphic analysis of the subsurface geology of Israel performed by OEIL during 1968-1988 (OEIL, 1966; Cohen et al., 1990). The database, dubbed "ATLAS," is about 16 MB in size and contains information on 320 petroleum exploration and development boreholes, 50 deep water wells, and 100 columnar sections of outcrops.
Konferenzberichte zum Thema "Oil-structure interaction"
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Clauss, G. F., und W. L. Kuhnlein. „Oil Skimming Vessels: Structure-Seaway Interaction Problems and Provisions for Wave Attenuation Systems“. In Offshore Technology Conference. Offshore Technology Conference, 1992. http://dx.doi.org/10.4043/6989-ms.
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Dorival, O., A. V. Metrikine und A. Simone. „A Lattice Model to Simulate Ice-Structure Interaction“. In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57918.
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The interaction between ice sheets and offshore structures is of key importance in the design of offshore platforms in the Arctic. Unfortunately, due to the complexity of ice material the use of small-scale experiments is problematic if one aims at drawing some conclusions about the forces exerted on large-scale structures such as oil rigs. As a preliminary work this paper proposes a discrete numerical model to investigate the interaction between an ice sheet and a rigid structure. The behavior of ice is modelled by a two dimensional lattice model, in which inhomogeneity and possible failure of ice are incorporated. According to the numerical results such a model seems able to capture the main trends involved in ice sheets cracking. This is an essential step towards predicting interaction forces between ice and structure.
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Aquelet, N., und M. Souli. „Damping Effect in Fluid-Structure Interaction: Application to Slamming Problem“. In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2063.
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During a high velocity impact of a structure on an incompressible fluid, impulse loads with high pressure peaks occur. This physical phenomenon called ‘slamming’ is a concern in the shipbuilding industry because of the possibility of hull damage. Shipbuilding companies are carrying out several studies on the slamming modeling using FEM software. This paper presents the prediction of the local high pressure load on a wedge striking a free surface. The fluid-structure interaction is simulated by a fluid-structure coupling algorithm. This method of coupling, which makes it possible to transmit the efforts in pressure from the Eulerian grid to the Lagrangian grid and vice versa, is a relatively recent algorithmic development. It was successfully used in many scientific and industrial applications: the modeling of the bird strike on the fuselage of a Jet for the Boeing Coporation, underwater explosion shaking the oil platforms, and airbag simulation in automotive industry... Predicting the local pressure peak on the structure requires an accurate fluid-structure interaction algorithm. Thus, some penalty coupling enhancements make the slamming modeling possible. The main improvement is a numerical damping factor which permits to smoothing of the pressure signal.
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Aquelet, N., und M. Souli. „Damping Effect in Fluid-Structure Interaction: Application to Slamming Problem“. In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1968.
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During a high velocity impact of a structure on an incompressible fluid, impulse loads with high pressure peaks occur. This physical phenomenon called ‘slamming’ is a concern in the shipbuilding industry because of the possibility of hull damage. Shipbuilding companies are carrying out several studies on the slamming modeling using FEM software. This paper presents the prediction of the local high pressure load on a wedge striking a free surface. The fluid-structure interaction is simulated by a fluid-structure coupling algorithm. This method of coupling, which makes it possible to transmit the efforts in pressure from the Eulerian grid to the Lagrangian grid and vice versa, is a relatively recent algorithmic development. It was successfully used in many scientific and industrial applications: the modeling of the bird strike on the fuselage of a Jet for the Boeing Corporation, underwater explosion shaking the oil platforms, and airbag simulation in automotive industry... Predicting the local pressure peak on the structure requires an accurate fluid-structure interaction algorithm. Thus, some penalty coupling enhancements make the slamming modeling possible. The main improvement is a numerical damping factor which permits to smoothing of the pressure signal.
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Landis, Ben, Se´bastien Muller, Margareta Petrovan-Boiarciuc, Ryan Brady und Guillaume Pe´rigaud. „Prevention of Transformer Tank Explosion: Part 4—Development of a Fluid Structure Interaction Numerical Tool“. In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77415.
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Oil filled transformer explosions and their prevention is a complex industrial issue. Experimental tests showed that when an electrical fault occurs in a transformer, it generates dynamic pressure waves that propagate in the oil. Reflections of these waves on the walls build up high static pressure which transformer tanks cannot withstand. The tank’s ability to withstand this pressure is thus one of the key parameters of transformer explosion prevention, and a numerical tool was developed to simulate the phenomena highlighted during the tests, especially the pressure wave propagation. The present paper’s aim is thus to complete this numerical tool so that the mechanical behavior of the tank can be accurately studied. The hydrodynamic numerical tool was subsequently coupled with a dynamic structure analysis package: the open source software Code_ASTER. A weak coupling strategy was first developed by applying the simulated pressures to the structure geometry in order to evaluate stresses and deformations. This strategy has evolved with the development of a strong coupling strategy which required establishing a moving mesh technique for the hydrodynamic code to accept displacement data from the structure code and complete the exchange between hydrodynamic and structure codes. First encouraging results are shown.
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Chen, Jiun-Yih, Richard Litton, Albert Ku, Ramsay Fraser und Philippe Jeanjean. „Seismic Soil-Structure Interaction Design Considerations for Offshore Platforms“. In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54934.
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Offshore platforms for oil and gas production in seismic regions around the world are often required to be designed for seismic hazards according to International Standards (e.g., ISO 19901-2 [1] and ISO 19902 [2]). This paper discusses three important aspects of the nonlinear dynamic time history analysis commonly used to design for Abnormal Level Earthquakes (ALE) in light of findings from recent centrifuge modeling and numerical simulation of the response of offshore structures under earthquake excitations. First, greater-than-expected ground motion de-amplification has been observed in a recent seismic soil-structure interaction centrifuge program for typical “soft” marine clays with undrained shear strength up to 100 kPa per API RP 2GEO [3]. Second, the current industry practice of using uniform down-pile ground motions in the time history analysis tends to underestimate pile bending moments. Use of depth-varying ground motions is strongly recommended to better characterize pile bending moments. Alternatively, a simplified design approach is proposed to account for the higher bending moments from the use of more realistic depth-varying ground motions. This approach is illustrated with a design example. Lastly, hysteretic and radiation damping in soil-structure interaction is discussed. Modeling of hysteretic damping is achieved using nonlinear elasto-plastic soil springs with unload-reload behavior following Masing’s rule, whereas modeling of radiation damping is achieved using viscous dashpots in a parallel or series arrangement with the axial and lateral soil springs and with dashpot coefficients based on O’Rourke and Dobry [4]. The centrifuge data show that proper modeling of radiation damping is important to accurately predict pile load and settlement.
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da Costa, Alvaro Maia, Carlos de Oliveira Cardoso, Claudio dos Santos Amaral und Alejandro Andueza. „Soil-Structure Interaction of Heated Pipeline Buried in Soft Clay“. In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27193.
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Heated pipelines buried in soft clay can develop a very challenging behavior. The thermal expansion of the pipelines normally induces buckles, which will be supported by the passive soil reaction. The buckles of the pipelines in soft clay can generate a non-linear inelastic behavior that is an unstable situation named “snap through”. In such situation the pipeline can jump from a configuration of a few centimeters displacement to another of meters displacement. Once the snap through situation has developed, there is the possibility of a local pipeline buckling, causing the pipeline rupture and as a consequence an oil spill. This paper presents the results obtained during the analysis of the rupture of a buried heated pipeline in the Guanabara Bay of Rio de Janeiro, Brazil. A very sophisticated procedure including a simulation of the thermal mechanical interactions between the soil and the pipeline structure was developed for back analysis of the thermal inelastic pipeline buckling. Computer modeling was carried out using the finite element method considering of the non-linear material behavior of the soil and pipeline, and nonlinear geometrical behavior of the pipeline. A cyclic thermal-mechanical soil-pipeline structure interaction model was the challenging aspect of the simulation, that explains the trigger mechanism of the snap through behavior of heated pipelines, which was responsible for the rupture of the pipeline in Guanabara Bay.
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Kawama, Itsuo. „A Study on the Stress Interaction Between Annular Plate and Foundation of the Oil Storage Tank“. In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3072.
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The annular area of the cylindrical oil storage tank is the part which is received the structural damage from the earthquake force. The design method of the foundation in this area is only to check the bearing pressure from the tank structure to the foundation. However, the deformation of annular plate and foundation are important value at the large earthquake. The safety of this area must be decided by the interaction of foundation and tank structure. This study examined the effect of foundation structure and material on the annular area of the tank by the finite element method. The result from this examination is showing that the crushed stone under the annular area of the tank is important to resist the earthquake force from tank structure.
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Yamamoto, Marcio, Motohiko Murai, Katsuya Maeda und Shotaro Uto. „An Experimental Study of the Interaction Between Pipe Structure and Internal Flow“. In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79312.
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Nowadays pipes are widely deployed in the offshore environment especially in the petroleum industry where rigid and flexible pipes are used for well drilling and hydrocarbon production. Whereas during drilling, a mixture of drilling mud, rock cuttings and sometimes gas flows through the drilling riser, during production mono or multiphase (comprising oil, water and gas) flow takes place within the system. However up till now, most of the studies on offshore pipelines and risers have been focused on the pipe structure and its interaction with hydrodynamic forces and offshore platforms. In particular for numerical computation studies and reduced scale model experiments, the pipe is usually modeled as a tensioned beam and sometimes only the internal pressure is taken into account with other effects due to its internal flow being neglected. This paper deals with the interaction between the pipe structure and its internal flow. In order to verify the internal flow effects, an experimental analysis was carried out not using a reduced scale model. In particular, mono-phase fluid flows into the pipe and a parametric analysis using the flow rate was carried out. Discussion about the experimental results and numerical applications is also included.
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Shu, Cheng, Li Hong und Zhang Dongxu. „Strength Analysis of Oil Tanker Under Numerical Wave“. In ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fedsm2018-83436.
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The strength of an oil carrier is generally checked using static load or equivalent load of wave action in accordance with relevant specifications. In order to accurately calculate the stress and the deformation of an oil carrier under wave action, the fluid-structure interaction system in the platform Workbench is used in this work. And, the pressure-based solver, the two-phase flow model and UDF (User Defined Function) in the software FLUENT are used to compile the three-order Stokes Wave so as to simulate ocean waves. Forces acting on the surface of the oil carrier are obtained by calculating the flow field, and the structural strength of the carrier is then investigated under sagging and hogging conditions. The results show that: the three-order Stokes Wave matches well with the theoretical result, and it is feasible to research the strength of the oil carrier by generating waves using this numerical method. In addition, the method of fluid-structure interaction is applied to investigate the structural strength of the fully-loaded carrier under sagging and hogging conditions.