检索结果-内蒙古大学图书馆

fluid-structure interaction in ship collisions

Marine structures 1989年第1期2卷 65-88页

作者： Samuelides, E. Frieze, P.A. Baaderstrasse 56D D-8000 Munchen 5 Germany United Kingdom

An innovative procedure for analysing the consequences of ship collisions is presented. It involves coupling of the dynamic structural and transient hydrodynamic responses experienced during this process. Both material and geometrical non-linearities are included in the structural analysis as are strain-rate effects. Conservation of momentum is invoked. The accuracy of the procedure is checked against others available in the literature. This necessitates simplification of the structural representation. Results are then presented for a longitudinally framed tanker in terms of critical speeds for a range of striking vessels which will cause ruptute of the side-shell. These results are found to be similar to those derived using a simpler approach. © 1989.

关键词： dynamic elasto-plastic analysis fluid-structure interaction ship collisions strain-rate transient

来源：评论

学校读者我要写书评

暂无评论

fluid-structure interaction with application to structural vibration and blood flow in arteries

Fluid-structure interaction with application to structural v...

引用

作者： Soltani, Helnaz Texas A&M University

学位级别：Ph.D.

The problem of interaction between fluids and structures is of practical significance in many fields of engineering. This interaction has to be taken into account in analyzing floating objects, ship sloshing, fluid containers subject to earthquake, flutter of airplane wings, suspended bridge subject to wind, submerged structures such as submarines, dam-reservoir systems, and blood flow through arteries. Such problems are known as the fluid-structure interaction (FSI) problems, where a structural domain interacts with an internal or surrounding fluid. A comprehensive study of these problems still remains a challenging task because of the coupling between the two domains and the existence of strong nonlinearity. For most FSI problems, constructing a complete mathematical model is the most difficult part because of different descriptions of motions used for fluids and solids. Most studies involving FSI embrace many simplifying assumptions to make the problem tractable. In this dissertation, finite element formulations are presented to study two types of representative FSI problems. First, we investigate the effect of the fluid region on the free vibration of beam and plate structures; in particular, natural frequencies and mode shapes of the beams and plates when they are surrounded by a fluid medium are determined. In these problems, we assume that the strains and rotations are considered to be infinitesimally small. Finite element models are constructed for both structural and fluid domains. To connect these two regions, the solid-fluid interface conditions, using the concept of an added mass, are used to construct a finite element model of the problems. Then, we focus on the transient response of plates in the presence of a fluid medium, wherein we consider the geometric nonlinearity with small strains and moderate rotations. Second, we study the effect of arterial walls on the blood flow through large arteries. Although we make several assumptions to simplify the d

关键词： fluid-structure interaction Structural vibration Transient response Blood flow through arteries Thesis

来源：评论

学校读者我要写书评

暂无评论

fluid-structure interaction studies on the cardiovascularhemodynamics of a mitral valve

Fluid-structure interaction studies on the cardiovascularhem...

引用

作者： Moghaddaszade Kermani, Ahmad University of Victoria

学位级别：doctor

The thesis presents a fluid-structure interactionstudies on the hemodynamics of blood flow in the left ventricle andthrough the mitral valve. The virtual model consists of amathematical model of the left ventricle coupled with a complex andstructurally flexible bi-leaflet valve representing the mitralopening. The mitral valve is a bicuspid valve with anterior andposterior leaflets and it regulates unidirectional blood flow fromthe left atrium to the left ventricle in the diastole phase. Theleaflets are made of chordae, annulus and papillary muscles. Thegoal of this study is to provide biomedical engineers and clinicalphysicians with a virtual laboratory tool to understand thedynamics of blood flow in a diseased heart and aid in the design ofnovel artificial heart valves. To this end, the simulation studiespresent an increasingly complex model of the heart to evaluate thevortex ring formation and evolution of the diastole phase in theleft ventricle; and to characterize the septal-anterior motion in adiseased heart with obstructive hypertrophic ***, in collaboration with an industrial partner, thefluid-structure modeling framework was used to evaluate theperformance of a new accelerated artificial valvetester.%%%%Graduate

关键词： fluid-structure interaction Computational fluid Dynamics Heart Valve

来源：评论

学校读者我要写书评

暂无评论

Biomechanical mechanisms behind the distal false lumen enlargement after TEVAR for type b aortic dissections: A computational one-way fluid–structure interaction study

引用

Journal of Biomechanics 2025年 188卷 112756-112756页

作者： Junheng Li Shuaishuai Wang Songchen Wang Cuiru Sun Xiangchen Dai Haofei Liu Department of Mechanics Tianjin University 92 Weijin Road Tianjin China 300072 Department of General Surgery Tianjin Medical University General Hospital 154 Anshan Road Tianjin China 300052

Distal false lumen (FL) expansion is a common complication after thoracic endovascular aortic repair (TEVAR) of type-B aortic dissection (TBAD). FL expansion is likely to cause post dissection aortic aneurysm (PDAA). At present, the biomechanical mechanism leading to the expansion of the FL is not clear, resulting in difficulties in its prevention and treatment. This paper presents a patient-specific one-way fluid–structure interaction (FSI) method for post-TEVAR TBAD patients. This method was then employed to predict the hemodynamic parameters and wall stress in five unstable and five stable patients post-TEVAR. Simulation results were employed to identify the characteristic mechanical parameters for the FL expansion, and to propose a possible mechanism behind FL expansion involving the relationship between the aortic morphology and the characteristic parameters. The pressure difference between false and true lumen, and the average wall stress of FL are recognized as the characteristic parameters for FL expansion, which effectively differentiate the two groups. The threshold value of wall stress between the two groups is about 75 kPa. Abnormally high luminal pressure difference and wall stress in the unstable group were attributed to their anatomical features, such as: enlarged FL, compressed TL, elevated thrombus ratio in FL, and significantly larger tear size. In conclusion, post-TEVAR expansion of the FL is correlated to high luminal pressure difference and elevated FL wall stress, which might be caused by the morphological features of the aorta.

关键词： Aortic dissection TEVAR fluid-structure interaction Hemodynamics Structural stress

来源：评论

学校读者我要写书评

暂无评论

3D numerical simulation on fluid-structure interaction of structure subjected to underwater explosion with cavitation

引用

Applied Mathematics and Mechanics(English Edition) 2012年第9期33卷 1191-1206页

作者：张阿漫任少飞李青李佳 College of Shipbuilding Engineering Harbin Engineering University China Ship Development and Design Center

In the underwater-shock environment, cavitation occurs near the structural surface. The dynamic response of fluid-structure interactions is influenced seriously by the cavitation effects. It is also the difficulty in the field of underwater explosion. With the traditional boundary element method and the finite element method （FEM）, it is difficult to solve the nonlinear problem with cavitation effects subjected to the underwater explosion. To solve this problem, under the consideration of the cavitation effects and fluid compressibility, with fluid viscidity being neglected, a 3D numerical model of transient nonlinear fluid-structure interaction subjected to the underwater explosion is built. The fluid spectral element method （SEM） and the FEM are adopted to solve this model. After comparison with the FEM, it is shown that the SEM is more precise than the FEM, and the SEM results are in good coincidence with benchmark results and experiment results. Based on this, combined with ABAQUS, the transient fluid-structure interaction mechanism of the 3D submerged spherical shell and ship stiffened plates subjected to the underwater explosion is discussed, and the cavitation region and its influence on the structural dynamic responses are presented. The paper aims at providing references for relevant research on transient fluid-structure interaction of ship structures subjected to the underwater explosion.

关键词： underwater explosion spectral element method （SEM） fluid-structure interaction cavitation stiffened plate

来源：评论

学校读者我要写书评

暂无评论

fluid-structure interaction of composite structures under impact loading 21

Fluid-structure interaction of composite structures under im...

引用

21st International Conference on Composite Materials, ICCM 2017

作者： Kwon, Young W. Dept. of Mechanical and Aerospace Eng. Naval Postgraduate School MontereyCA93943 United States

Previous studies showed that the effect of fluid-structure interaction (FSI) was significant on polymer composite structures under dynamic loading. In this study, fluid coupling effect was examined on composite structures. In other words, fluid was filled between two parallel structures. As one structure is subjected to dynamic loading, the motion of the other structure was examined. The cellular automata techniques were used for this study, and a series of parametric studies were conducted to understand what parameters were important to affect the fluid coupling. © 2017 International Committee on Composite Materials. All rights reserved.

关键词： Composite structure fluid coupling fluid-structure interaction

来源：评论

学校读者我要写书评

暂无评论

DYNAMIC ANALYSIS OF fluid-structure interaction OF ENDOLYMPH AND CUPULA IN THE LATERAL SEMICIRCULAR CANAL OF INNER EAR

引用

Journal of Hydrodynamics 2011年第6期23卷 777-783页

作者： WU Cai-qin HUA Cheng YANG Lin DAI Pei-dong ZHANG Tian-yu WANG Ke-qiang Department of Mechanics and Engineering Science Fudan University Shanghai 200433 China Eye and ENT Hospital of Fudan University Shanghai 200031 China Cardiovascular Disease Institute Zhongshan Hospital of Fudan University Shanghai 200032 China

The semicircular canals, composed of lateral, anterior and posterior canals in the inner ear, are the sensors of equilibrium during head rotation movements in the three-dimensional space. Semicircular canals are filled with endolymph confined by the cupula. The study of the relationship between endolymph flow and cupular deformation is important in revealing the semicircular canals biomechanical behavior. To date, there are few studies focusing on the transient endolymph flow and cupular deformation in response to a head rotation motion. The lateral semicircular canal is mainly responsible for the sense of the horizontal rotation movement. In order to figure out the intricate dynamics in the lateral semicircular canal during the head rotation motion, the time evolutions of both endolymph flow and cupular deformation are analyzed in this article by using a fully coupled fluid-structure interaction model. It is shown that the cupular deformation provides cues for understanding the physiology of sensing the head rotation.

关键词： fluid-structure interaction endolymph cupula finite element method

来源：评论

学校读者我要写书评

暂无评论

A review of fluid-structure interaction: blood flow in arteries

Biomedical Engineering Advances

引用

Biomedical Engineering Advances 2025年 9卷

作者： Zubeir Allum Saib Farid Abed Mergen H. Ghayesh Marco Amabili Biomedical Engineering Graduate Program American University of Sharjah Sharjah United Arab Emirates Department of Bioengineering New York University Abu Dhabi Abu Dhabi United Arab Emirates Department of Civil Engineering American University of Sharjah Sharjah United Arab Emirates School of Electrical and Mechanical Engineering University of Adelaide South Australia Australia School of Engineering Westlake University Hangzhou Zhejiang province China

Over the past decade, fluid-structure interaction studies related to blood vessels have been an active area of research, as they adequately capture the multiphysics of blood flow within the circulatory system. Despite the growing interest, only few state-of-the-art reviews have been published in the literature, each focusing individually on the coronary artery, carotid artery, aorta, heart valves and peripheral arteries. This systematic review assesses the current research and implications of fluid-structure interaction implementation strategies in relation to human arteries. It is meant to comprehensively amalgamate research studies on an array of arteries coupled with cardiovascular complications such as atherosclerosis, plaque calcification, aneurysms, aortic dissections and valve dysfunction. It additionally covers computational finite element and finite volume solver demands, coupling schemes, inlet and outlet boundary conditions specifications, Newtonian and non-Newtonian blood rheological properties, laminar and turbulent flow types, as well as the modelling of the vessel wall’s hyperelastic and viscoelastic mechanical behavior. The research information is retrieved from the last ten years and summarized in a tabulated format, to help researchers in easily extracting useful information for future investigations and reviews.

关键词： fluid-structure interaction Computational fluid dynamics Finite element analysis Blood flow Hemodynamics Biomechanics Atherosclerosis Aneurysm Calcification Artery Plaque Valve

来源：评论

学校读者我要写书评

暂无评论

fluid-structure interaction effects on the dynamics of a moving deformable hydrofoil in a fluid flow 14th

Fluid-structure interaction effects on the dynamics of a mov...

引用

14th European Wave and Tidal Energy Conference, EWTEC 2021

作者： Brousseau, P. Benaouicha, M. Guillou, S. Cherbourg University Laboratory of Applied Sciences LUSAC-University of Caen Normandy 60 rue Max-Pol Fouchet Cherbourg-Octeville 50130 France SEGULA TECHNOLOGIES Research and Innovation Unit in Naval and Energy engineering France and with the Cherbourg University Laboratory of Applied Sciences LUSAC-University of Caen Normandy 19 Rue d’Arras 92000 Nanterre 60 rue Max-Pol Fouchet Cherbourg-Octeville 50130 France

The paper focuses on the study of a semiactivated system, based on a combination of a two movements of forced pitching and free heaving motion. Therefore, quantifying with accuracy the hydrodynamic forces applied on the hydrofoil seems to be crucial. This is investigated throughout a numerical modeling of a 2D flexible hydrofoil dynamics, immersed in a fluid flow with a Reynolds number of 2000. In this study, the hydrofoil is animated by a combined forced pitching and heaving movements. Various materials of the structure are studied, from the rigid material to a more flexible one. The fluid-structure interaction (FSI) effects are considered using a partitioned implicit coupling scheme. The Arbitrary Lagrangian-Eulerian (ALE) formulation of the Navier-Stokes equations is applied. Both the viscous incompressible Navier-Stokes equations and the elasticity equation are solved using finite volume method. The study is based on the analysis of the hydrodynamic loads acting on the structure. Therefore, the induced dynamics and the power coefficient of the structure are investigated. It is shown that the flexibility of the hydrofoil has an effect on its hydrodynamic behaviour and that in some configurations, the structure deformations can improve the device energy efficiency. © European Wave and Tidal Energy Conference 2021.

关键词： Deformable structure fluid-structure interaction Numerical simulation Oscillating hydrofoil

来源：评论

学校读者我要写书评

暂无评论

fluid-structure interaction in an Isolated Nuclear Power Plant Comparing Linear and Nonlinear fluid Models

Fluid-Structure Interaction in an Isolated Nuclear Power Pla...

引用

作者： Hoekstra, Joshua McMaster University

学位级别：硕士

The long-term operational safety of nuclear power plants is of utmost importance. Seismic isolation has been shown to be effective in reducing the demands on structures in many applications, including nuclear power plants (NPP). Many designs for Generation III+ NPP include a large passive cooling tank as a measure of safety that can be used during power failure. In a large seismic event, the fluid in the tank may be excited, and while the phenomenon of fluid-structure interaction (FSI) has also been studied in the context of base isolated liquid storage tanks, the effect on seismically isolated NPP has not yet been explored. This thesis presents a two-part study on a base isolated NPP with friction pendulum bearings. The first part of the study compares the usage of a linear fluid model to a nonlinear fluid model in determining tank and structural demand parameters. The linear fluid model was found to represent the nonlinear fluid model well for preliminary analysis apart from peak sloshing height, which it consistently underestimated. The second part of the study uses a linear fluid model, an empty tank model and a rigid fluid model to investigate the influence of FSI on the structural response of an isolated NPP compared to a fixed base NPP. In general, the response of a fixed base NPP considering FSI using a linear fluid model can typically be bound by the results assuming an empty tank and assuming a full tank with rigid fluid mass. However, this does not hold for the base isolated NPP, as the peak isolation displacement for an NPP with a linear fluid model at design depth is greater than the peak isolation displacement than the same NPP with an empty tank and with a rigid fluid model. Thesis Master of Applied Science (MASc)

关键词： fluid-structure interaction Nuclear Power Plant Base Isolation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：