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Analysis of seismic response parameters of double-trough aqueduct structure considering two-way fluid-structure interaction effect

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ALEXANDRIA ENGINEERING JOURNAL 2025年 118卷 606-617页

作者： Huang, Liang Li, Ge Li, Haotian Xu, Jianguo Wan, Ruizhuo Zhengzhou Univ Coll Civil Engn Zhengzhou 450000 Peoples R China

As a pivotal component within water diversion engineering, the aqueduct has experienced substantial growth in recent years. Scholars have extensively explored the interaction between water and solid structures within aqueducts. Notably, the question of whether the presence of water in the aqueduct can either enhance seismic absorption or exacerbate seismic responses has emerged as a crucial concern in aqueduct structural seismic resistance. To address this quandary, a refined two-way fluid-structure interaction methodology has been employed. This method accounts for variations in water pressure, water inertia forces, excitation frequencies, and aqueduct aspect ratios. It meticulously monitors liquid level changes using the Volume of fluid (VOF) method, while FLUENT tracks wall pressure. Consequently, it calculates the aqueduct displacement under different influencing factors. The outcomes reveal that the water within the aqueduct exhibits Tuned Liquid Damping (TLD) effects, with the shock absorption effectiveness being directly related to water quality rather than differences in moving water pressure. Higher excitation frequencies result in increased peak aqueduct displacements but reduced water body oscillations. Under consistent water quality conditions, greater aspect ratios yield higher moving water pressures and, consequently, improved shock absorption capabilities.

关键词： Aqueduct fluid-structure interaction TLD effect Water action Parametric analysis

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Analysis of fluid-structure interaction galloping characteristics of high-speed railway catenary positive feeder in stranded convex shape in windy areas

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JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS 2025年第1期48卷 66-80页

作者： Zhao, Shanpeng Zhu, Ziheng Zhang, Haixi Lanzhou Jiaotong Univ Sch Automat & Elect Engn 88 Anning Rd Lanzhou 730070 Peoples R China Lanzhou Jiaotong Univ Rail Transit Elect Automat Engn Lab Gansu Prov Lanzhou Peoples R China

To further clarify the galloping characteristics of the non-iced catenary positive feeder under the influence of the windbreak wall wake, this study constructs a model for the galloping of the Lanzhou-Urumqi high-speed railway catenary positive feeder in windy areas, considering the stranded convex shape based on aerodynamic theory. Using fluid-structure interaction methods, the displacement, lift, and drag coefficients were analyzed in both time and frequency domains. The results indicate that the natural frequency ratio significantly affects the positive feeder at different wind speeds. When horizontal and vertical frequencies are equal, the positive feeder experiences coupled vibration with the maximum galloping amplitude. There are significant differences in galloping amplitude under different degrees of freedom systems, with horizontal motion suppressing vertical galloping. The flow fields of smooth and stranded convex shapes show significant differences at various time points, with the stranded convex shape separating earlier, resulting in a counterclockwise long-axis elliptical trajectory, while the smooth shape shows a clockwise short-axis elliptical trajectory. This indicates that the galloping characteristics of the positive feeder are closely related to its shape, highlighting the advantages of the stranded convex shape in dynamic simulations. This study provides important theoretical support for understanding and preventing the galloping of catenary in windy areas of the Lanzhou-Urumqi high-speed railway.

关键词： Lanzhou-Urumqi high-speed railway galloping characteristics stranded convex shape fluid-structure interaction

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A fully cell-based immersed smoothed finite element method with the mean value coordinate projection using quadrilateral elements for fluid-structure interaction

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ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 2025年 172卷

作者： Huo, Shuhao Wang, Hengzhi Li, Zhipeng Li, Zhiqiang Jiang, Chen Liu, Guirong Taiyuan Univ Technol Coll Aeronaut & Astronaut Taiyuan 030024 Peoples R China Cent South Univ Sch Traff & Transportat Engn Key Lab Traff Safety Track Minist Educ Changsha 410076 Peoples R China Univ Cincinnati Dept Aerosp Engn & Engn Mech Cincinnati OH 45221 USA

In this work, an effective and stable immersed cell-based smoothed finite element method (ICS-FEM) together with mean value coordinate (MVC) projection using quadrilateral elements is presented for 2D fluid-structure interaction (FSI) problems. In an immersed-based algorithm, the entire system can be divided into three components: large-deformed nonlinear structure, incompressible viscous fluid, and fictitious fluid for FSI force. A characteristic-based split (CBS) CS-FEM solver is developed to solve the Navier-Stokes (N-S) equation. An explicit total Lagrange (TL) CS-FEM solver is utilized to depict the large deformation of the elastic structure. The problem domains are discretized into a set of quadrilateral elements and four cell-based smoothing domains are constructed for each element. The cell-based smoothing operation instead of the traditional mapping operation of isoparametric elements is executed to all gradient-related terms for both structures and fluids. A method based on the mean value coordinates is used for the interpolation process and the search criterion. Four numerical examples are utilized to illustrate the advance of the proposed method, including computational precision, convergence rate, robustness, etc.

关键词： Cell-based smoothed finite element method Immersed boundary method Characteristic-based split scheme Mean value coordinates method Quadrilateral element fluid-structure interaction

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Research on fluid-structure interaction vibration and bandgap properties of periodic composite hydraulic pipes

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APPLIED OCEAN RESEARCH 2025年 158卷

作者： Zhou, Fuming Liao, Jian He, Lin Chen, Zongbin Tan, Xiaopeng Liang, Yundong Naval Univ Engn Inst Noise & Vibrat Wuhan 430033 Peoples R China Nation Key Lab Ship Vibrat & Noise Wuhan 430033 Peoples R China

This research incorporates the Bragg scattering mechanism in phononic crystal theory into fluid-structure interaction vibration suppression of hydraulic pipes. Based on steel pipes and hydraulic composite hoses, a periodic composite hydraulic pipe structure is developed, and its vibration and bandgap properties are investigated. Firstly, based on the anisotropic laminated shell theory, fluid dynamic equations and fluid-structure interaction boundary conditions, the one-dimensional fluid-structure interaction axial and transverse vibration models of the hydraulic composite hoses are derived. This model is compatible with the classical fluid-structure interaction model;specifically, when the pipe material is steel, it degenerates into the classical fluid-structure interaction 8-equation model. Secondly, the transfer matrix is constructed using the Laplace-characteristics method to solve the fluid-structure interaction model of the steel and hose-based periodic composite hydraulic pipes. By incorporating the Bloch wave vector theorem, the bandgaps and frequency response functions of the composite pipes are determined. The accuracy of the proposed method is validated by comparing the results with those from finite element simulations. On this basis, the influence of the fluid-structure interaction effect on bandgaps and vibration properties is investigated. Numerical results indicate that in the axial direction, Poisson coupling modulates the pulsation pressure and vibration wave vectors to form new bandgaps, while friction coupling has minimal impact on bandgaps but dissipates high-frequency vibration energy. In the transverse direction, the mass and inertia effects of the fluid shift the vibration bandgaps towards lower frequencies. Finally, the effects of fluid and pipe parameters on axial and transverse vibration bandgaps are examined. This research provides a novel and effective approach for vibration suppression in hydraulic pipes and offers valuable theoretical g

关键词： Hydraulic composite hoses Periodic pipes fluid-structure interaction Vibration bandgaps

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Comparison between the fluid-structure interaction approach and the finite element method approach to analyze the leaflet flutter in bioprosthetic aortic valve

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JOURNAL OF BIOMECHANICS 2025年 181卷 112532-112532页

作者： Costa, Matheus Carvalho Barbosa Gonsalves, Saulo de Freitas Fleury, Joao Victor Curado Silva, Mario Luis Ferreira da Huebner, Rudolf Avelar, Artur Henrique de Freitas Univ Fed Minas Gerais Dept Mech Engn Grad Program Mech Engn Ave Presidente Antonio Carlos 6627 BR-31270901 Belo Horizonte MG Brazil Univ Fed Minas Gerais Dept Mech Engn Ave Presidente Antonio Carlos 6627 BR-31270901 Belo Horizonte MG Brazil Univ Fed Sao Joao Del Rei Praca Frei Orlando 170 Sao Joao Del Rei MG Brazil

The low durability of bioprosthetic heart valves (BHV), between 10-15 years, is associated with the development of leaflets flutter. Despite increasing calcification and structural damage of the BHV, leaflets flutter is an understudied condition. Therefore, the objective of this study is compare the oscillation characteristics of BHV leaflets obtained by the finite element method (FEM) technique and by the fluid-structural interaction (FSI) technique. A BHV geometry and a simplified fluid domain were developed. Physiological ventricular and aortic pressure were applied in the FEM and FSI simulations. The BHV were considered with incompressible hyperelastic and isotropic mechanical behavior, while the blood was modeled as a Newtonian fluid. Turbulence was modeled according to the k - omega SST model. The displacement and maximum principal stress results showed that the FSI approach was in better agreement with the in vitro studies in the literature. Furthermore, the leaflet vibration frequency was 12 times lower and the amplitude 50 times higher compared to the FEM method. From the stress distribution in the leaflets, the highest values occurred in the commissure region of the ventricular side for both techniques. In addition, while the stress was more uniform for FEM, FSI showed a stress concentration in the belly region of the leaflets. This study indicates that the use of the FEM technique to assess fatigue intensification due to leaflet fluttering could induce inaccurate conclusions, since it does not incorporate the dynamic fluid impacts on leaflets.

关键词： Bioprothesis Flutter Finite element method fluid-structure interaction Arbitrary Lagrangian-Eulerian formulation

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Hemodynamic Evaluation of Intra-Aortic Dual-Balloon Pump Based on fluid-structure interaction

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INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2025年第1期41卷 e3899页

作者： Ma, Hongchao Wang, Yuhan Gao, Bin Li, Shu Song, Zhiming Chang, Yu Zhang, Ran Beijing Univ Technol Coll Chem & Life Sci Beijing Peoples R China Beijing Int Sci & Technol Cooperat Base Intelligen Beijing Peoples R China Inst Med Device Control Natl Inst Food & Drug Control Beijing Peoples R China Tongji Univ Shanghai East Hosp Dept Cardiac Surg Sch Med Shanghai Peoples R China Zhejiang Univ Natl Clin Res Ctr Child Hlth Sch Med Childrens Hosp Hangzhou Peoples R China Gen Hosp Chinese peoples Liberat Army Med Ctr 1 Dept Cardiol Beijing Peoples R China

The intra-aortic balloon pump (IABP) is a widely-used mechanical circulatory support device that enhances hemodynamics in patients with heart conditions. Although the IABP is a common clinical tool, its effectiveness in enhancing outcomes for patients with acute myocardial infarction and cardiogenic shock remains disputed. This study aimed to assess the effectiveness of intra-aortic dual-balloon pump (IADBP) and its impact on aortic hemodynamics compared with an IABP. Three-dimensional finite element models were constructed for the aorta, IABP, and IADBP, followed by numerical simulation using the fluid-structure coupling (FSI) method. Three simulations were conducted: Heart failure patients without assistive devices (Case A), those with IABP (Case B), and those with IADBP (Case C). The study assessed the IADBP's hemodynamic effects by measuring aortic branch blood flow, left ventricular afterload, aortic wall stress, and wall shear stress. IADBP outperformed IABP in enhancing blood flow to the coronary arteries, upper limbs, and brain vessels (left and right coronary arteries: 0.88 vs. 1.27, 1.27 vs. 1.99 mL/beat;brachiocephalic artery, left common carotid artery, and left subclavian artery: 6.08 vs. 12.39, 2.48 vs. 4.97, 2.31 vs. 5.08 mL/beat). IADBP also demonstrated superior performance in counterpulsation pressure and left ventricular ejection (counterpulsation phase: 97.41 mmHg vs. 110.03 mmHg;ventricular unloading phase: 72.21 mmHg vs. 66.46 mmHg). The use of IADBP elevates stress on the aortic wall and wall shear stress, potentially affecting vascular health. IADBP effectively addresses upper limb and cerebral hypoperfusion issues associated with IABP, demonstrating superior performance in enhancing counterpulsation pressure and left ventricular ejection. Despite potential vascular biomechanical effects, IADBP provide a promising clinical treatment option. Further studies are needed to refine IADBP 's design and evaluate its long-term clinical efficacy.

关键词： fluid-structure interaction hemodynamic intra-aortic balloon pump intra-aortic dual-balloon pump

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Numerical discretization errors of fluid-structure interaction model in pressurized pipeline systems

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APPLIED MATHEMATICAL MODELLING 2025年 142卷

作者： Huang, Hai Guo, Pengcheng Yan, Jianguo Xian Univ Technol Sch Water Resources & Hydroelect Engn Xian 710048 Peoples R China Xian Univ Technol State Key Lab Ecohydraul Northwest Arid Reg Xian 710048 Peoples R China

The fluid-structure interaction (FSI) effects in pressurized pipeline systems may induce pipe vibrations, leading to more severe water hammer incidents. Therefore, establishing an FSI model for liquid-filled pipelines and developing efficient and accurate numerical simulation methods are crucial. These advancements enable precise prediction of FSI water hammer phenomena, which is essential for the design and protection of pressurized pipeline systems. When using the FSI four-equation axial model for water hammer calculations, techniques such as space-line interpolation (SLI), time-line interpolation (TLI), or wave speed adjustment (WSA) are commonly employed for grid processing. However, these techniques inevitably introduce additional numerical discretization errors. Existing literatures have primarily conducted quantitative analyses by comparing numerical results of different grid processing techniques with exact solutions or experimental data, lacking a theoretical analysis. To address this gap, this study establishes an equivalent hyperbolic differential equations (EHDE) approach for numerical discretization error analysis of the FSI four-equation axial model. EHDEs for SLI, TLI, and WSA are specifically derived to analyze how these techniques generate numerical discretization errors and the factors influencing these errors during the solution process. Theoretical findings are validated through numerical case studies. The results indicate that SLI introduces non-physical numerical dissipation terms into the fluid equations of the FSI four-equation axial model. TLI transforms a single fluid pressure wave into a superposition of two pressure waves with different wave speeds, causing additional numerical dissipation and dispersion due to this non-physical superposition. WSA introduces numerical errors when adjusting wave speeds artificially. Among the three grid processing techniques, SLI exhibits the highest sensitivity to grid resolution, followed by TLI, while W

关键词： Pressurized pipeline Water hammer fluid-structure interaction Four-equation axial model Equivalent hyperbolic differential equations

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Implementation and Validation of an Original OpenFOAM Code for fluid-structure interaction Problems in Compressible Flow

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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2025年第4期50卷 2335-2350页

作者： Benhamou, Abdessoufi Belghoula, Samir Miloud Lab Mech & Energy LME Chlef 02000 Algeria Hassiba Benbouali Univ Fac Technol Dept Mech Engn Chlef 02000 Algeria Hassiba Benbouali Univ Fac Civil Engn Dept Hydraul BP 78C Chlef 02180 Algeria

Simulating interactions involving compressible fluids with potential shock waves and highly deformable structures demands the precise capture of flow dynamics and structural responses. This coupling must effectively manage substantial deformations while adapting to changes in the fluid domain's topology. This study focuses on the rhoSonicFsiFoam solver, developed using the open-source computational fluid dynamics (CFD) software, OpenFOAM. The computational approach addresses aeroelasticity, fluid compressibility and advanced coupling. Two tests were performed, with the first involving the beating of a thin plate in supersonic flow and the second featuring the interaction of a shock wave with a deformable plate. In the flutter test, simulation results intimately matched the theoretical Mach number of 2.2677, indicating a strong alignment between the numerical results of this present study (M infinity num is an element of 2.26,2.27\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$M_{\infty }<^>{{{\text{num}}}} \in \left] {2.26,2.27} \right[$$\end{document}) and theoretical expectations. Additionally, simulation results from the computational approach closely align with theoretical projections for plate fluttering and correlate well with experimental and numerical outcomes from the T80 shock tube. This project aims to unravel fluid-structure interaction by combining a robust solution method with the latest advancements in CFD. Leveraging this platform, the computational approach accurately captures aeroelastic phenomena, including shock waves and deformations during interactions with compressible fluid and deformable structures. Implications span aerospace, defense and energy sectors. In conclusion, this study underscores the pivotal role of advanced simulation techniques in comprehending int

关键词： fluid-structure interaction Compressible flow Aeroelasticity Numerical simulation rhoSonicFsiFoam

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Blade Exit Angle Impact on Centrifugal Pump Performance: Entropy Generation and fluid-structure interaction Analysis

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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2025年第4期50卷 2509-2525页

作者： Sakran, Hayder Kareem Aziz, Mohd Sharizal Abdul Khor, C. Y. Univ Sains Malaysia Sch Mech Engn Engn Campus Perai 14300 Penang Malaysia Al Muthanna Univ Fac Engn Chem Engn Dept Muthanna Iraq Univ Malaysia Perlis Fac Mech Engn & Technol Perlis Malaysia

Understanding the impact of specific design parameters is essential for enhancing pump functionality and minimizing energy consumption. Alterations in the blade exit angle impact the static pressure, relative velocity, and energy loss within the pump and associated effects on the structural behavior of the impeller. This work investigates the influence of the blade exit angle on the performance, hydraulic, and structural design of the flow passage components of the centrifugal pump. Impeller models with different exit angles (15 degrees, 20 degrees, 30 degrees, 40 degrees, and 55 degrees) were simulated while keeping all other parameters constant. Computational investigations were conducted to examine the flow characteristics of a centrifugal pump with five distinct impellers using the shear stress transport k-omega turbulence model. The numerical investigation was validated with the previous study. The analysis focuses on variations in static pressure, relative velocity, and energy loss. Besides, the energy loss distribution was investigated to determine the total entropy generation (TEG) and entropy generation rate (EGR). The fluid-structure interaction (FSI) for several impeller models was used to examine the effect of the exit angle on the structural properties of the impeller. The results demonstrate that the blade exit angle significantly impacts the pump performance. An increase in blade exit angle has resulted in a rise in head and pressure. Furthermore, the structural behaviors, including the total deformation and equivalent stress, are discussed. The findings of this study provide valuable insights into enhancing energy efficiency and hydraulic design principles of centrifugal pumps.

关键词： Blade exit angle Centrifugal pump Entropy generation method fluid-structure interaction

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Nonlinear vibration analysis of a generally orthotropic cracked micro-plate with variable thickness considering fiber effects and fluid-structure interaction

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING 2025年

作者： Chandrakar, Bhupesh Kumar Jain, Nitin Kumar Gupta, Ankur Natl Inst Technol Dept Mech Engn Raipur 492010 India

This research investigates the nonlinear vibration response of partially cracked, generally orthotropic, rectangular micro-plates featuring non-uniform thicknesses coupled with a fluid medium. The traditional classical plate theory (CPT) in conjunction with a modified couple stress theory (MCST) is used to derive the governing equation of a generally orthotropic rectangular plate of varying thickness. The presence of a partial crack at the plate's center is modeled using a simplified line spring model (LSM), and in-plane forces and bending moment resulting from a partial crack are incorporated into the equation. Furthermore, the interaction with a fluid medium is considered, with the introduction of virtual added mass via the velocity potential function and Bernoulli's equations, considering both horizontal and vertical plate immersion scenarios. The study also explores thickness variations in one and two dimensions along the X and Y axes. The methodology employs Galerkin's approach to convert governing equations into time-dependent modal coordinates, and Berger's method introduces nonlinearity into these coordinates. The approximation solution, a method of multiple scales, is utilised to solve the plate's nonlinear governing equations. Various parameters are considered in the analysis, including crack length, size effect, thickness variations, fiber orientations, fluid levels, and immersion depth. The study explores the impact of these factors on the vibration behaviour of submerged partially cracked, generally, orthotropic non-uniform thickness micro-plates under two different boundary conditions, presenting novel findings. Additionally, an illustration is provided to visually depict the bending-hardening and bending-softening phenomenon concerning the taper constant and depth of submergence.

关键词： Vibration micro-plate crack varying thickness fluid-structure interaction

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