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Analysis of Nonlinear Dynamic Response of Wind Turbine Blade Under fluid-structure interaction and Turbulence Effect

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JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME 2014年第10期136卷 102604页

作者： Zhang, Jianping Zhang, Kaige Zhou, Aixi Zhou, Tingjun Hu, Danmei Ren, Jianxing Shanghai Univ Elect Power Coll Energy & Mech Engn Shanghai 200090 Peoples R China Univ N Carolina Dept Engn Technol & Construct Management Charlotte NC 28223 USA

In this paper, the entity model of a 1.5MW offshore wind turbine blade was built by Pro/Engineer software. fluid flow control equations described by arbitrary Lagrange-Euler (ALE) were established, and the theoretical model of geometrically nonlinear vibration characteristics under fluid-structure interaction (FSI) was given. The simulation of offshore turbulent wind speed was achieved by programming in MATLAB. The brandish displacement, the Mises stress distribution and nonlinear dynamic response curves were obtained. Furthermore, the influence of turbulence and FSI on blade dynamic characteristics was studied. The results show that the response curves of maximum brandish displacement and maximum Mises stress present the attenuation trends. The region of the maximum displacement and maximum stress and their variations at different blade positions are revealed. It was shown that the contribution of turbulence effect (TE) on displacement and stress is smaller than that of the FSI effect, and its extent of contribution is related to the relative span length. In addition, it was concluded that the simulation considering bidirectional FSI (BFSI) can reflect the vibration characteristics of wind turbine blades more accurately.

关键词： wind turbine blade fluid-structure interaction turbulence effect geometric nonlinearity nonlinear dynamic response

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Unconditionally Stable Pressure-Correction Schemes for a Linear fluid-structure interaction Problem

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Numerical Mathematics(Theory,Methods and Applications) 2014年第4期7卷 537-554页

作者： Ying He Jie Shen Department of Mathematics Purdue UniversityWest LafayetteIN 47907USA

We consider in this paper numerical approximation of the linear fluid-structure interaction(FSI).We construct a new class of pressure-correction schemes for the linear FSI problem with a fixed interface,and prove rigorously that they are unconditionally *** schemes are computationally very efficient,as they lead to,at each time step,a coupled linear elliptic system for the velocity and displacement in the whole region and a discrete Poisson equation in the fluid region.

关键词： fluid-structure interaction pressure-correction stability analysis

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fluid-structure interaction in compliant insect wings

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BIOINSPIRATION & BIOMIMETICS 2014年第2期9卷 025005页

作者： Eberle, A. L. Reinhall, P. G. Daniel, T. L. Univ Washington Dept Mech Engn Seattle WA 98195 USA Univ Washington Dept Biol Seattle WA 98195 USA

Insect wings deform significantly during flight. As a result, wings act as aeroelastic structures wherein both the driving motion of the structure and the aerodynamic loading of the surrounding fluid potentially interact to modify wing shape. We explore two key issues associated with the design of compliant wings: over a range of driving frequencies and phases of pitch-heave actuation, how does wing stiffness influence (1) the lift and thrust generated and (2) the relative importance of fluid loading on the shape of the wing? In order to examine a wide range of parameters relevant to insect flight, we develop a computationally efficient, two-dimensional model that couples point vortex methods for fluid force computations with structural finite element methods to model the fluid-structure interaction of a wing in air. We vary the actuation frequency, phase of actuation, and flexural stiffness over a range that encompasses values measured for a number of insect taxa (10-90 Hz;0-pi rad;10(-7)- 10(-5) Nm(2)). We show that the coefficients of lift and thrust are maximized at the first and second structural resonant frequencies of the system. We also show that even in regions of structural resonance, fluid loading never contributes more than 20% to the development of flight forces.

关键词： insect flight wing flexibility fluid-structure interaction vortex particle methods finite element methods

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An investigation of dentinal fluid flow in dental pulp during food mastication: simulation of fluid-structure interaction

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BIOMECHANICS AND MODELING IN MECHANOBIOLOGY 2014年第3期13卷 527-535页

作者： Su, Kuo-Chih Chuang, Shu-Fen Ng, Eddie Yin-Kwee Chang, Chih-Han Natl Cheng Kung Univ Coll Engn Dept Biomed Engn Tainan 701 Taiwan Natl Cheng Kung Univ Inst Oral Med Tainan 701 Taiwan Natl Cheng Kung Univ Dept Stomatol Coll Med & Hosp Tainan 701 Taiwan Nanyang Technol Univ Sch Mech & Aerosp Engn Coll Engn Singapore 639798 Singapore

This study uses fluid-structure interaction (FSI) simulation to investigate the relationship between the dentinal fluid flow in the dental pulp of a tooth and the elastic modulus of masticated food particles and to investigate the effects of chewing rate on fluid flow in the dental pulp. Three-dimensional simulation models of a premolar tooth (enamel, dentine, pulp, periodontal ligament, cortical bone, and cancellous bone) and food particle were created. Food particles with elastic modulus of 2,000 and 10,000 MPa were used, respectively. The external displacement loading was gradually directed to the food particle surface for 1 and 0.1 s, respectively, to simulate the chewing of food particles. The displacement and stress on tooth structure and fluid flow in the dental pulp were selected as evaluation indices. The results show that masticating food with a high elastic modulus results in high stress and deformation in the tooth structure, causing faster dentinal fluid flow in the pulp in comparison with that obtained with soft food. In addition, fast chewing of hard food particles can induce faster fluid flow in the pulp, which may result in dental pain. FSI analysis is shown to be a useful tool for investigating dental biomechanics during food mastication. FSI simulation can be used to predict intrapulpal fluid flow in dental pulp;this information may provide the clinician with important concept in dental biomechanics during food mastication.

关键词： Dental biomechanics fluid-structure interaction Dentinal fluid flow Mastication Chewing rates

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A full-Eulerian approach for simulation of a system of fluid-rigid-elastic structure interaction based on the vorticity-stream function formulation

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fluid DYNAMICS RESEARCH 2023年第1期55卷 015505-015505页

作者： Farahbakhsh, Iman Paknejad, Amin Ghassemi, Hassan Amirkabir Univ Technol Dept Maritime Engn Tehran Iran Univ Tehran Coll Engn Sch Mech Engn Tehran Iran Harbin Inst Technol Sch Ocean Engn Weihai 264209 Peoples R China

A monolithic mathematical framework for understanding the fluid-rigid-elastic structure interaction problem is proposed. A numerical method in a secondary formulation of the Navier-Stokes equations accompanying a technique for imposing the rigid boundaries is applied. The one-fluid formulation of the incompressible Navier-Stokes equation, containing the terms governing the elastic structure, is transformed into the vorticity-stream function formulation. The rigid structure is imposed in the flow field based on the velocity-vorticity kinematic relation and harmonic function theorem. The vorticity, level-set function, and left Cauchy-Green deformation tensor are updated utilizing three transport equations to investigate the evolution of the velocity field, elastic structure(s) configuration, and elastic stress tensor. The method is implemented to solve three challenging problems, and the results show its capabilities in proper imposing the rigid structures in the flow field and also the simultaneous modeling the rigid and elastic structure interactions with incompressible fluid flow.

关键词： fluid-structure interaction elastic structure Navier-Stokes equation vorticity-stream function rigid structure

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Random Material's Characteristics to Study fluid-structure interaction

Random Material's Characteristics to Study Fluid-Structure I...

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Rouen Symposium on Advanced Materials (ROSAM 2013)

作者： Mansouri, Mohamed Radi, Bouchaib El Hami, Abdelkhalak Saouab, Abdelghani LIMMII FST Settat Settat Morocco INSA Rouen LOFIMS F-76801 St Etienne De Rouvray France Univ Le Havre LOMC F-76610 Le Havre France

In many situations, the vibrating structures are in contact with a fluid (fluid around the hulls of a boat, reservoirs, heat exchangers in power plants, etc.), but the dynamic behavior of the structure can be significantly modified by the presence of the fluid. The sizing must take into account the effects of fluid-structure interaction. Traditionally, the study of mechanical systems fluid-structure interaction is based on a deterministic approach where all the parameters used in the model are a fixed value. But it suffices to having conducted a few experimentations to realize that the limitations of such modeling. Hence it needs to take into accounts the uncertainty in the parameters of mechanical systems. This work proposes to take the characteristics of the structure and the fluid as random and shows the efficiency of such approach. The proposed numerical stochastic method of the modal synthesis extended to reliability study, based on FORM (First Order Reliability Method) and SORM (Second Order Reliability Method) approaches, for solving the large vibro-acoustic problems. The numerical method used takes into account the uncertainties of the input parameters of the two domains. The application of the proposed method is performed on a boat propeller immersed in air and water. To validate the calculation process, the numerical study is compared to an experimental study.

关键词： fluid-structure interaction modal synthesis numerical simulation random material characteristics reliability vibro-acoustic

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About Finite Element Analysis of fluid - structure interaction Problems 23

About Finite Element Analysis of Fluid - Structure Interacti...

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23rd Russian-Polish-Slovak Seminar on Theoretical Foundation of Civil Engineering (RSP) (TFoCE)

作者： Belostosky, Alexander M. Akimov, Pavel A. Kaytukov, Taymuraz B. Afanasyeva, Irina N. Usmanov, Anton R. Scherbina, Sergey V. Vershinin, Vladislav V. Moscow State Univ Civil Engn 26 Yaroslavskoe Shosse Moscow 129337 Russia Samara State Univ Architecture & Civil Engn Samara 443001 Russia

The distinctive paper is devoted to problems of solution of fluid flows, modelled using the Navier-Stokes or Euler equations, and coupled with structures ( solids). Brief literature review is presented. Problem formulation, finite element discretization, simultaneous and partitioned solution procedures, are discussed, and advantages and disadvantages of their use are mentioned. Some state-of-the-art numerical solutions, obtained by ANSYS Mechanical, ANSYS CFX and ABAQUS, are also presented to indicate problems that can now be solved using currently available techniques. (C) 2014 The Authors. Published by Elsevier Ltd.

关键词： finite element method fluid-structure interaction arbitrary Lagrangian-Eulerian formulation coupled procedures numerical solutions ANSYS Mechanical ANSYS CFD ABAQUS

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A Comprehensive Simulation Methodology for fluid-structure interaction of Offshore Wind Turbines 11th

A Comprehensive Simulation Methodology for Fluid-Structure I...

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EERA 11th Deep Sea Offshore Wind R and D Conference (DeepWind)

作者： Rasheed, Adil Holdahl, Runar Kvamsdal, Trond Akervik, Espen SINTEF ICT Appl Math POB 4760 Sluppen NO-7465 Trondheim Norway Norwegian Def Res Estab FFI NO-2027 Kjeller Norway

This paper gives an overview of a comprehensive simulation methodology for fluid-structure interaction (FSI) of offshore wind turbines that is being developed at the Applied Mathematics Department of SINTEF ICT. The methodology will account for most of the scales ranging from mesoscale meteorology through microscale meteorology to the aerodynamics of wind turbine blades. The meso and micro scales are handled through a unidirectional coupling of a meso and micro scale atmospheric code while the fluid structure interaction part is dealt with an isogeometric finite element based fluid-structure simulation code IFEM. In the current work we have shown the potential of the coupled system which is actually meant to generate realistic boundary condition as a wind forecasting tool. Also we present a comparison of the IFEM computed drag, lift and moment coefficients against experimental data for flow around a 3-D oscillating airfoil. (C) 2014 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/3.0/).

关键词： fluid-structure interaction Wind Turbine Isogeometric Finite Element Method Meteorology

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Development of Coupled fluid-structure interaction Code for Explosion Problem

Development of Coupled Fluid-Structure Interaction Code for ...

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4th International Symposium on Explosion, Shock Wave and High-Energy Reaction Phenomena

作者： Saburi, Tei Kubota, Shiro Wada, Yuji Yoshida, Masatake Natl Inst Adv Ind Sci & Technol Onogawa 16-1 Tsukuba Ibaraki 3058561 Japan Explos Res Inst Inc Chiyoda Ku Tokyo 1010021 Japan

ISBN: (纸本)9783037858264

A multidimensional analysis code for reactive shocks (MARS), which is developed to solve various problems in the physical hazard analysis of high energetic materials, has been applied to such complex problems as multi-material problem and sympathetic problem because it can employ various types of equations of state and a materials database. However, it was difficult to meet a growing demand for large-scale analysis and fluid-structure interaction (FSI) analysis. To address these issues, this study reports a parallelization of the code and an implementation of the functional capability of FSI analysis, and performance results for sample problems were also shown.

关键词： parallelization fluid-structure interaction coupling analysis blast loading

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Numerical simulation of fluid-structure interaction with water hammer in a vertical penstock subjected to high water head

Numerical simulation of fluid-structure interaction with wat...

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3rd International Conference on Energy, Environment and Sustainable Development (EESD 2013)

作者： Zhang, Hongming Zhang, Lixiang Kunming Univ Sci & Technol Dept Engn Mech Kunming 650500 Peoples R China

ISBN: (纸本)9783037859728

The theoretical model of weakly compressible coupling water hammer was established and a FSI program code was developed for coupled weakly compressible water with penstock movement. It combines the weakly compressible water source CFD code and FEM shell element code. The shell element based on orthogonal curvilinear coordinates was completed in FEAP. Meanwhile, the turbulence model in OpenFoam class library was called by using object-oriented technology. This code takes into account both the weak compressibility of water and fluid turbulence characteristics. Using this code, a fluid structure interaction analysis with water hammer was completed. The numerical results agree well with the field test results.

关键词： water hammer fluid-structure interaction penstock

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