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Vibration Characteristics of FML Cylindrical Shell Bonded by Thin Piezoelectric Actuator and Sensor Layer with and Without fluid-structure interaction Resting on Pasternak Elastic Foundation

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INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS 2024年第21期24卷

作者： Khademi-Kouhi, M. Ghasemi-Ghalebahman, A. Farrokhabadi, A. Aliha, M. R. M. Ferdowsi Univ Mashhad Dept Aerosp Engn Mashhad *** Iran Semnan Univ Fac Mech Engn Semnan *** Iran Tarbiat Modares Univ Dept Mech Engn Tehran 14115111 Iran Iran Univ Sci & Technol IUST Welding & Joining Res Ctr Sch Ind Engn Tehran *** Iran Gebze Tech Univ Engn Fac Dept Mech Engn TR-41400 Gebze Kocaeli Turkiye

The present study investigates the vibration analysis of cylindrical shells composed of fiber metal laminate (FML) with embedded piezoelectric layers, undergoing fluid-structure interaction (FSI) and resting on a Pasternak elastic foundation based on the principles of three-dimensional elasticity theory. Using the state space approach, the equations of motion were derived under simply supported boundary conditions. The natural frequencies of the FML cylindrical shell, accounting for the presence of a moving fluid, were computed by solving the eigenfrequency equations. The study examined the influence of various parameters, including boundary conditions, length-to-radius ratio, fluid type, fluid velocity, circumferential wave number, and radius-to-thickness ratio, on glass-reinforced aluminum laminate (GLARE), aramid-reinforced aluminum laminate (ARALL), and carbon-reinforced aluminum laminate (CARALL). A constant composite/metal volume ratio was assumed. The results obtained were validated by comparing with natural frequency values from the existing literature, confirming the agreement and convergence with previous studies. The results confirm that the highest natural frequency values are assigned to the CARALL, ARALL and GRALE structures in descending order. Furthermore, an increase in fluid flow velocity through the cylindrical shell correlates with a reduction in natural frequency.

关键词： Vibration characteristics fiber metal laminate cylindrical shell piezoelectric fluid-structure interaction Pasternak elastic foundation

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Whirling dynamics of a drill-string with fluid-structure interaction

GEOENERGY SCIENCE AND ENGINEERING

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GEOENERGY SCIENCE AND ENGINEERING 2024年 232卷

作者： Volpi, L. P. Cayeux, E. Time, R. W. Univ Stavanger Kjell Arholms gate 41 N-4021 Stavanger Norway Norwegian Res Ctr Prof Olav Hanssens vei 15 N-4021 Stavanger Norway

fluid-structure interaction models for drill-string vibrations are often of reduced order. However, both the structure and the surrounding fluid are non-linear, which can lead to complex coupled dynamic. In this paper, a coupled fluid-structure model is developed, where the flow is reduced to multiple cross-sections and solved with the lattice-Boltzmann method, while the finite element method is employed to discretize a region of the drill-string. In sequence, the whirling dynamics and the fluid forces are analysed for different configurations. The process is repeated disregarding the fluid-interaction with the aim of evaluating the fluid forces. The fluid forces estimated through the solution of the Navier-Stokes equation shows that the fluid acts in both dissipation and excitation of the vibrations. The dissipation is seen when high frequency dynamics is expected, whereas the lower frequencies are excited.

关键词： Lattice-Boltzmann Finite element fluid-structure interaction

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Computational fluid-structure interaction in Microfluidics

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MICROMACHINES 2024年第7期15卷 897-897页

作者： Musharaf, Hafiz Muhammad Roshan, Uditha Mudugamuwa, Amith Trinh, Quang Thang Zhang, Jun Nguyen, Nam-Trung Griffith Univ Queensland Micro & Nanotechnol Ctr Brisbane Qld 4111 Australia Griffith Univ Sch Engn & Built Environm Brisbane Qld 4111 Australia

Micro elastofluidics is a transformative branch of microfluidics, leveraging the fluid-structure interaction (FSI) at the microscale to enhance the functionality and efficiency of various microdevices. This review paper elucidates the critical role of advanced computational FSI methods in the field of micro elastofluidics. By focusing on the interplay between fluid mechanics and structural responses, these computational methods facilitate the intricate design and optimisation of microdevices such as microvalves, micropumps, and micromixers, which rely on the precise control of fluidic and structural dynamics. In addition, these computational tools extend to the development of biomedical devices, enabling precise particle manipulation and enhancing therapeutic outcomes in cardiovascular applications. Furthermore, this paper addresses the current challenges in computational FSI and highlights the necessity for further development of tools to tackle complex, time-dependent models under microfluidic environments and varying conditions. Our review highlights the expanding potential of FSI in micro elastofluidics, offering a roadmap for future research and development in this promising area.

关键词： micro elastofluidics fluid-structure interaction computational methods microdevices cardiovascular modelling

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Flutter analysis of compressor blades under travelling wave modes using an efficient fluid–structure interaction method

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Chinese Journal of Aeronautics 2023年第11期36卷 221-232页

作者： Kangdi LI Yunxiang DU Zili XU Shizhi ZHAO Lu CHENG State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an 710049China Beijing Institute of Structure and Environment Engineering Beijing 100076China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Dongfang Steam Turbine Co.LtdDeyang 618000China

Flutter is a self-sustained vibration which could create serious damage to compressor *** the efficiency and accuracy of fluid-structure interaction(FSI)method is crucial to flutter *** efficient FSI method which combines a fast mesh deformation technology and Double-Passage Shape Correction(DPSC)method is proposed to predict blades flutter under traveling wave ***,regarding the fluid domain as a pseudo elastic solid,the flow mesh deformation and blade vibration response can be quickly obtained by solving the governing equations of the holistic system composed of blade and pseudo elastic ***,by storing and updating the Fourier coefficients on the circumferential boundary,the phase-lagged boundary condition is introduced into the computational ***,the aerodynamic stability for the blades of an axial compressor under various Inter-Blade Phase Angle(IBPA)is *** results show that the proposed method can effectively predict the characteristics of aerodynamic damping,aerodynamic force and blade *** a conceptual model is proposed to describe the motion behavior of the shock *** with the multi-passage method,the proposed method obtains almost the same unstable IBPA interval and the blade displacement error is less than 3.4%.But the calculation time is significantly shortened especially in small IBPA cases.

关键词： Flutter Inter-blade phase angle Fast mesh deformation fluid-structure interaction Shock wave

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Flow sensing method for fluid-structure interaction systems via multilayer proper orthogonal decomposition

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JOURNAL OF fluidS AND structureS 2024年 124卷

作者： Jia, Xuyi Gong, Chunlin Ji, Wen Li, Chunna Northwestern Polytech Univ Sch Astronaut Shaanxi Aerosp Flight Vehicle Design Key Lab Xian 710072 Peoples R China

Flow sensing is widely used to forecast flow field in fluid-structure interaction (FSI) systems. The FSI system with multiple flexible structures usually involves complex unsteady flow and large number of sensors, which makes it difficult to perform flow sensing. In this study, a flow sensing method for FSI systems via multilayer proper orthogonal decomposition (POD) is proposed to achieve real-time forecast of flow field using structural deformation. First, we establish the POD model of structural deformation. To improve model accuracy for flow field, we propose the multilayer POD model, which mainly focus on the local modeling accuracy in the region with complex flow structures. Then, we establish the multilayer model of flow field. Furthermore, the deep neural network model is employed to map the mode coefficients of the structure to all the mode coefficients of the multilayer POD. The proposed method is applied in two FSI systems, including the flow past a flexible filament clamped behind a cylinder and the flow past flexible filament set. Both constant inflow and transient flow conditions are considered. The results indicate that the proposed flow sensing method exhibits excellent spatial-temporal performance, performs accurately in flow properties forecasting, and is suitable for FSI systems with complex flow structures such as coherent vortices.

关键词： Flow sensing fluid-structure interaction Multilayer proper orthogonal decomposition Deep neural network Flexible filaments

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The fluid-structure interaction seismic analysis of the BWR nuclear power plant spent fuel pool

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NUCLEAR ENGINEERING AND TECHNOLOGY 2025年第6期57卷

作者： Shen, Yu-Yu Natl Atom Res Inst Taoyuan Taiwan

In the nuclear power plant, the spent fuel pool (SFP) is an important nuclear security structure, it uses as temporary storage for spent fuel assemblies and removes the decaying heat with pool water from spent fuel assemblies. The issue of seismic safety concerning nuclear facilities has always been a primary concern for the country located in an earthquake-prone zone. When an earthquake strikes the spent fuel pool, it could lead water to sloshing behavior. It may produce additional forces on the pool and cause water overflow. It is therefore critical to investigate the sloshing phenomenon in a seismic assessment of the SFP. The objective of the paper is concerned with the problem of modeling the fluid-structure interaction (FSI) analysis with a SFP under Beyond-Design-Basis Earthquake (BDBE). The study focuses on the sloshing phenomena with the finite element analysis (FEA) code LS-DYNA. To be concerned about the structural integrity of the spent fuel pool, this paper also applied ACI-349 and ASME code to evaluate the seismic performance of the structure and the safety margin. The results show that the Taiwan BWR Mark-I Nuclear Power Plant spent fuel pool can maintain its structural integrity under the beyond-design basis earthquakes.

关键词： Spent fuel pool Structural integrity fluid-structure interaction

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Application of computational fluid dynamics and physics informed neural networks in predicting rupture risk of thoracoabdominal aneurysms with fluid-structure interaction analysis

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CHINESE JOURNAL OF PHYSICS 2025年 95卷 433-454页

作者： Rehman, M. Abaid Ur Ekici, Ozgur Farooq, M. Asif Talha, Rashid M. Amir, Sadaf Natl Univ Sci & Technol NUST Sch Nat Sci SNS Dept Math Sect H-12 Islamabad 44000 Pakistan Hacettepe Univ Dept Mech Engn TR-06800 Ankara Turkiye

laminar and turbulent flow conditions are explored to reflect the diastolic and systolic phases, respectively.

关键词： Thoracoabdominal aneurysms Physics informed neural networks fluid-structure interaction Asymmetry Thrombus Rupture risk CFD Turbulent flow

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Vortex waves in fluid-structure interaction with high Froude number and a damped structure

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OCEAN ENGINEERING 2024年 306卷

作者： Kaptue, H. Simo Zeufo, L. Ngou Samba, Y. Mbono Kofane, T. C. Univ Yaounde I Fac Sci Dept Phys Lab Appl Mech POB 812 Yaounde Cameroon Univ Yaounde I Fac Sci Dept Phys Lab Mech POB 812 Yaounde Cameroon Botswana Int Univ Sci & Technol Private Bag 16 Palapaye Botswana

In this paper, we study the non -linear dynamic response generated as a result of a fluid-structure interaction between a flexible structure and a flowing fluid, when the structure is subjected to non -linear excitations. In first place, the use of semi-discrete approximations allowed us to show that the motion of a flexible structure coupled with a surrounding fluid flowing could be modelled and analysed via a coupled Complex Cubic Ginzburg-Landau equations (CCGLEs). Through the obtained CCGLEs, we were able to show that modulational instability (MI) is the main mechanism responsible for the generation of vortex shedding. Moreover, we showed that the stability of continuous wave depends on the coupling parameters between the fluid and the structure. Secondly, using a mathematical method, namely the G'/G expansion method, we found that vortex wave trains could be generated as cylindrical waves. These results are highly significant from a theoretical point of view and could be a plus to explain the process of generation of K & aacute;rm & aacute;n Vortex as a consequence of unstable coupling between two continuous wave in the fluid-structure system. Moreover, considering the industrial interest, such as floating wind turbines, this work aims to provide an additional understanding of the interactions between a flexible body and a surrounding flow.

关键词： K & aacute rm & aacute n Vortex street Modulational instability Cylindrical wave fluid-structure interaction Complex Ginzburg Landau equation

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On the Local Existence of Solutions to the fluid-structure interaction Problem with a Free Interface

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APPLIED MATHEMATICS AND OPTIMIZATION 2024年第3期90卷 1-31页

作者： Kukavica, Igor Li, Linfeng Tuffaha, Amjad Univ Southern Calif Dept Math Los Angeles CA 90089 USA Univ Calif Los Angeles Dept Math Los Angeles CA 90095 USA Amer Univ Sharjah Dept Math & Stat Sharjah U Arab Emirates

We address a system of equations modeling an incompressible fluid interacting with an elastic body. We prove the local existence when the initial velocity belongs to the space H1.5+& varepsilon;\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$H<^>{1.5+\epsilon }$$\end{document} and the initial structure velocity is in H1+& varepsilon;\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$H<^>{1+\epsilon }$$\end{document}, where & varepsilon;is an element of(0,1/20)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\epsilon \in (0, 1/20)$$\end{document}.

关键词： fluid-structure interaction Local existence Navier-Stokes equations Wave equation Trace regularity

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Numerical study of fluid-structure interaction for enhanced heat transfer in microchannels with an oscillating elastic wall

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CASE STUDIES IN THERMAL ENGINEERING 2024年 64卷

作者： Havasi, Farzad Hosseini, Seyyed Hossein Azizi, Abdolhamid Seidi, Masoud Zonoozi, Sajjad Ahangar Ahmadi, Goodarz Univ Tabriz Dept Mech Engn Tabriz Iran Ilam Univ Dept Chem Engn Ilam 69315516 Iran Ilam Univ Dept Mech Engn Ilam 69315516 Iran Ilam Univ Dept Comp Engn Ilam 69315516 Iran Clarkson Univ Dept Mech & Aerosp Engn Potsdam NY 13699 USA

The present numerical study explores the performance of fluid-structure interaction (FSI) in a microchannel with an oscillating elastic wall. A two-dimensional (2D) Computational fluid Dynamics (CFD) simulation was performed to investigate the influence of the elastic wall's frequency and amplitude on fluid flow behavior, pressure drop, and heat transfer enhancement. The FSI governing equations were solved using the Arbitrary Lagrangian-Eulerian (ALE) method. The results indicated that the Nusselt number (Nu) decreases as oscillation frequency increases. In contrast, the Nu increased linearly with the oscillation amplitude. Additionally, the Prandtl number (Pr) showed an insignificant influence on the Nu number for the studied operating range. An optimal operating condition was identified for the microchannel with an oscillating wall, achieving a spatial average Nu number of 16.796 compared to 14.577 for a simple microchannel channel, representing a 15.23 %% enhancement in heat transfer. A correlation is derived for the spatial average Nu number as a function of the Reynolds number (Re), Strouhal number (St), Pr, and vibration amplitude ratio, providing a valuable tool for designing and optimizing microchannel systems with FSI. Finally, the Maxwell boundary conditions are incorporated into the simulation of a microchannel with a vibrating upper wall to evaluate the slip conditions.

关键词： fluid-structure interaction Microchannel Elastic wall Heat enhancement

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