Journal of Fluids and Structures最新文献_第3页

Achievements of dense ESPI complex-valued full-field receptances in experiment-based Rayleigh integral approximations of sound radiation from a vibrating plate 基于实验的振动板声辐射瑞利积分近似中密集ESPI复值全场接收的成就

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-25 DOI: 10.1016/j.jfluidstructs.2025.104340

Alessandro Zanarini

{"title":"Achievements of dense ESPI complex-valued full-field receptances in experiment-based Rayleigh integral approximations of sound radiation from a vibrating plate","authors":"Alessandro Zanarini","doi":"10.1016/j.jfluidstructs.2025.104340","DOIUrl":"10.1016/j.jfluidstructs.2025.104340","url":null,"abstract":"<div><div>Where can the exploitation of high spatial resolution optical full-field technologies – in <em>complex-valued</em> representation – bring, for an experiment-based extension of the Rayleigh integral approximation of sound radiation from a vibrating plate? <em>Dense receptance</em> maps may cope with the challenges of the most advanced Noise and Vibration Harshness (NVH) testing for the characterisation of the structural dynamics of the actual set-up, with damping and boundary conditions coming from the mounting and manufacturing, with all the potential delays of the responses caught around the superposition of a modally dense dynamics, but without the need of a Finite Element Model (FEM), especially in the case of lightweight structures. Sound radiations are explored in the <em>complex-valued</em> details of <em>vibro-acoustic transfer functions</em> and of <em>pressure</em> fields, by feeding the well-known Rayleigh formulation with Electronic Speckle Pattern Interferometry (ESPI)-based <em>receptances</em>, obtained from a simple thin rectangular plate, designed as a lightweight structure with a complex structural dynamics, its real constraints and damping characteristics. The contribution of <em>dense</em> experiment-based full-field <em>receptances</em> to the radiated sound fields at different distances is discussed in a broad frequency domain.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104340"},"PeriodicalIF":3.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A penalization-based strong partitioned coupling with application to cavitation-induced damage 基于惩罚的强分区耦合及其在空化损伤中的应用

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-25 DOI: 10.1016/j.jfluidstructs.2025.104364

L. Ménez , M. Beringhier , P. Parnaudeau , E. Goncalves

{"title":"A penalization-based strong partitioned coupling with application to cavitation-induced damage","authors":"L. Ménez , M. Beringhier , P. Parnaudeau , E. Goncalves","doi":"10.1016/j.jfluidstructs.2025.104364","DOIUrl":"10.1016/j.jfluidstructs.2025.104364","url":null,"abstract":"<div><div>A novel strong partitioned coupling strategy is developed in order to address Fluid–Structure Interaction (FSI) problems. The Brinkman penalization method is adopted to model the deformable fluid–solid interface on a fixed Cartesian grid. Originally designed for single-phase flows and rigid bodies, the penalization method is extended to compressible multiphase flows and deformable walls. This numerical model is applied to the analysis of cavitation-induced damage at the microscopic scale, focusing on the shock-induced collapse of a single bubble near an elastoplastic material. We examine the effect of initial bubble–wall distance on wall pressure, material damage and permanent wall deformation (i.e., cavitation pit). This parametric study is conducted for different material yield strengths. Both pit depth and area increase rapidly as the bubble–wall distance and yield strength decrease. Whereas closer bubbles generate a deep, circular pit, more distant bubbles can produce a shallower, annular pit. The effect of FSI coupling is thoroughly analyzed across all parametric configurations. Wall deformation results in the damping of wall pressure, leading to differences in material damage between weakly and strongly coupled simulations. At the moment of impact, the damping of wall pressure is initially governed by the ratio of the acoustic impedances of the fluid and solid media. It is then further amplified locally by plasticity or, more generally, in regions of higher deformation. A small reduction in wall pressure leads to a much more significant damping in both pit depth and pit area. While the decrease in wall pressure is locally affected by material deformation, the change in pit size remains approximately constant for all configurations.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104364"},"PeriodicalIF":3.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation of flow around the legs during walking in water with implications for hydrotherapeutic exercise 在水中行走时腿部周围流动的数值模拟及其对水疗运动的影响

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-23 DOI: 10.1016/j.jfluidstructs.2025.104352

Umang N. Patel, Frank C. Sup IV, Yahya Modarres-Sadeghi

{"title":"Numerical simulation of flow around the legs during walking in water with implications for hydrotherapeutic exercise","authors":"Umang N. Patel, Frank C. Sup IV, Yahya Modarres-Sadeghi","doi":"10.1016/j.jfluidstructs.2025.104352","DOIUrl":"10.1016/j.jfluidstructs.2025.104352","url":null,"abstract":"<div><div>One of the common hydrotherapeutic exercises is walking in water because buoyancy reduces joint loading and increases mobility for a patient. The fluid drag forces (the forces that act on the person from the fluid in the direction opposing the direction of motion) cause changes in muscle activations, as walking in water changes the forces that act on the leg compared with overground walking. Here, through a series of numerical simulations, we quantify how the flow forces that act on the leg due to its motion in water change over a walking gait cycle. We show that besides drag forces that act on the walking legs and peak when the leg is accelerated forward, relatively large lateral forces (in the direction perpendicular to the direction of motion) also act on the leg. These forces are caused by the rapid acceleration of the opposite leg when the two legs are close, creating an asymmetric pressure distribution around the leg. These results are unexpected and could have significant implications for designing hydrotherapeutic plans for patients by considering the lateral forces besides the drag forces that act on the body while walking in water.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104352"},"PeriodicalIF":3.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An adaptive time integration approach for aeroelastic simulations using the unsteady vortex-lattice method and geometrically exact beams 采用非定常涡格法和几何精确梁的气动弹性模拟自适应时间积分方法

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-18 DOI: 10.1016/j.jfluidstructs.2025.104360

David Märtins , Daniel Schuster , Christian Hente , Helge Jauken , Cristian Guillermo Gebhardt , Raimund Rolfes

{"title":"An adaptive time integration approach for aeroelastic simulations using the unsteady vortex-lattice method and geometrically exact beams","authors":"David Märtins , Daniel Schuster , Christian Hente , Helge Jauken , Cristian Guillermo Gebhardt , Raimund Rolfes","doi":"10.1016/j.jfluidstructs.2025.104360","DOIUrl":"10.1016/j.jfluidstructs.2025.104360","url":null,"abstract":"<div><div>In the context of aeroelastic simulations, the unsteady vortex-lattice method, strongly coupled with geometrically exact beams, represents a good balance between computational cost and accuracy. However, the computation of aerodynamic loads can still be very time-consuming. To reduce the wall time of aeroelastic computations using the unsteady vortex-lattice method and geometrically exact beams, we strive for a technique to reduce the number of time steps necessary to simulate a given physical time. This paper presents an approach to calculate and adapt the time step size, which can significantly reduce the total computation time without compromising the accuracy of the result. In order to achieve this, the time step size is adapted following the evolution of relevant physical quantities describing the system (ring circulations, aerodynamic forces, potential energy, kinetic energy). Limits for the minimum and maximum time step sizes are introduced by monitoring the geometry of the wake elements. This straightforward approach can easily be adapted to other aeroelastic frameworks using the unsteady vortex-lattice method. The high potential for computational acceleration is demonstrated in the application example of a NACA wing, the benchmark of the Pazy wing, and the NREL 5 MW reference wind turbine.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104360"},"PeriodicalIF":3.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation of aerodynamic features and flow structure of a high-speed high-temperature superconducting maglev train under crosswind based on reduced-order methods 基于降阶方法的高速高温超导磁悬浮列车侧风作用下气动特性及流动结构数值研究

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-17 DOI: 10.1016/j.jfluidstructs.2025.104367

Zongpeng Li , Xiaofei Wang , Tianhao Ma , Yiming Pan , Weihua Zhang , Zigang Deng , Pengfei Liu

{"title":"Numerical investigation of aerodynamic features and flow structure of a high-speed high-temperature superconducting maglev train under crosswind based on reduced-order methods","authors":"Zongpeng Li , Xiaofei Wang , Tianhao Ma , Yiming Pan , Weihua Zhang , Zigang Deng , Pengfei Liu","doi":"10.1016/j.jfluidstructs.2025.104367","DOIUrl":"10.1016/j.jfluidstructs.2025.104367","url":null,"abstract":"<div><div>The flow topology and unsteady aerodynamic features of the high-temperature superconducting (HTS) maglev train under crosswind at 400 km/h, 500 km/h, and 600 km/h are simulated based on the improved delayed detached eddy simulation (IDDES) turbulence model and SST <em>k-ω</em> two-equation. The accuracy of the numerical method was confirmed by using wind tunnel test data. To elucidate the comprehensive spatiotemporal features of the train's surrounding flow field, the proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) methods are used to perform reduced-order analysis of the unsteady flow field around the high-speed HTS maglev train, and explore the vibration law of the high-speed maglev train outflow field under crosswind in-depth. The results demonstrate that the periodic vortex shedding from flow separation, particularly around the car's shoulder and the train's underside, causes high-frequency vibrations responsible for high-frequency aerodynamic load pulsations. Large-scale flow field vibrations due to variations in the strength and position of the main leeward vortex cause low-frequency pulsations in aerodynamic loads. Crosswinds and track structures significantly affect the development of the wake. The wake pulsations mainly consist of two structures: the continuous, slender main vortex structure that starts to develop along the rear of the train and the pulsating, turbulent, or strip-like separated vortex structures. The research findings can provide some references for advancing the engineering design and application of the HTS high-speed maglev technology.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104367"},"PeriodicalIF":3.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on the vibration characteristics induced by severe slugging in a pipeline S-shaped riser system 管道s型隔水管严重段塞流振动特性试验研究

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-14 DOI: 10.1016/j.jfluidstructs.2025.104365

Yuwen Li, Qiang Xu, Yeqi Cao, Bo Huang, Haiyang Yu, Liejin Guo

{"title":"Experimental investigation on the vibration characteristics induced by severe slugging in a pipeline S-shaped riser system","authors":"Yuwen Li, Qiang Xu, Yeqi Cao, Bo Huang, Haiyang Yu, Liejin Guo","doi":"10.1016/j.jfluidstructs.2025.104365","DOIUrl":"10.1016/j.jfluidstructs.2025.104365","url":null,"abstract":"<div><div>The investigation of the severe slugging characteristics and its induced vibration is an important basis for effectively avoiding fatigue damage or excessive stress in the offshore riser system. In this paper, a non-invasive optical method is used to study the vibration induced by severe slugging in a pipeline S-shaped riser system. Based on the image data of the gas-liquid interface structure and differential pressure fluctuation, severe slugging is classified into three sub-flow patterns (SS1, SS2, and SS3), and the flow characteristics and dynamic response of the riser are investigated at three sub-flow patterns. The two peaks in the spectral of the riser vibration response correspond to the fluctuation frequency of the differential pressure and the first natural frequency of the riser, respectively, and then a correlation for predicting the response frequency induced by severe slugging is established. The vibration amplitude of the riser is strongly related to the bubble length and the liquid slug velocity in the gas blowdown stage. The in-plane vibration responses of the riser are dominated by the first and second modes. The two modes coexist and switch over time due to the continuous change of slug characteristic parameters.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104365"},"PeriodicalIF":3.4,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A hydroelastic fluid-structure interaction solver based on a coupled 3D SPH-FEM method 基于三维SPH-FEM耦合方法的水弹性流固耦合求解器

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-12 DOI: 10.1016/j.jfluidstructs.2025.104366

Xin Chen , Jie Cui , Ji-Yang Li , Peng-Cheng Shi

{"title":"A hydroelastic fluid-structure interaction solver based on a coupled 3D SPH-FEM method","authors":"Xin Chen , Jie Cui , Ji-Yang Li , Peng-Cheng Shi","doi":"10.1016/j.jfluidstructs.2025.104366","DOIUrl":"10.1016/j.jfluidstructs.2025.104366","url":null,"abstract":"<div><div>The present work is aimed at developing an accurate numerical self-programming framework to simulate the violent 3D fluid-structure interaction process by a coupled Lagrangian particle method and mesh-based method, where the hydrodynamic load is solved by smoothed particle hydrodynamics (SPH) and the structural dynamics is predicted by the Finite Element method (FEM). It should be noted that the degenerated continuum theory is introduced to describe the structure dynamics, which can be easily applied to the complex structure discretization in some cases. And at the same time, a normal flux approach is developed to overcome the shortcoming of support domain truncation for fluid particles near the fluid-structure interface. Additionally, some other advanced numerical processing techniques are employed to improve the coupling stability and robustness of the 3D SPH-FEM solver, such as the δ-SPH model and the conventional sequential staggered algorithm. Finally, through several typical hydro-elastic benchmark tests and commercial software tests, including the hydrostatic water column test, free surface flow-structure interaction and elastic structure water entry slamming test, the numerical accuracy and overall stability are discussed and verified systematically, which can promote the numerical algorithm research on hydro-elastic effect in ocean engineering.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104366"},"PeriodicalIF":3.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep learning vortex-induced vibrations: Time-space forecasting with transformers 深度学习涡激振动：变压器的时空预测

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-07 DOI: 10.1016/j.jfluidstructs.2025.104337

Andreas P. Mentzelopoulos , Ioannis Papakalodoukas , Dixia Fan , Themistoklis P. Sapsis , Michael S. Triantafyllou

引用次数: 0

Scattering of obliquely incident waves by a half-submerged horizontal cylinder in a two-layer fluid 半浸没在两层流体中的水平圆柱体对斜入射波的散射

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-06 DOI: 10.1016/j.jfluidstructs.2025.104341

Minakshi Ghosh, Dilip Das

引用次数: 0

Suppressing shock-induced oscillations of a compliant panel with viscoelastic materials 用粘弹性材料抑制柔性板的冲击振荡

IF 3.4 2区工程技术

Journal of Fluids and Structures Pub Date : 2025-06-04 DOI: 10.1016/j.jfluidstructs.2025.104335

C. Riveiro Moreno , M. Couliou , N. Fabbiane , R. Bur , O. Marquet

{"title":"Suppressing shock-induced oscillations of a compliant panel with viscoelastic materials","authors":"C. Riveiro Moreno , M. Couliou , N. Fabbiane , R. Bur , O. Marquet","doi":"10.1016/j.jfluidstructs.2025.104335","DOIUrl":"10.1016/j.jfluidstructs.2025.104335","url":null,"abstract":"<div><div>The influence of structural viscosity on the fluid–structure interaction between a normal shock-wave and a compliant panel is investigated. Two compliant panels are designed to allow significant static deformation while exhibiting different dynamic behaviors. For this purpose, two distinct elastomeric materials are used based on their dynamic responses within the shock oscillation frequency range: polyurethane 40A for the elastic panel and Tango Polyjet 61A for the viscoelastic panel. Dynamic mechanical analyses characterize the materials’ dynamic properties, enabling the evaluation of natural vibration modes and frequencies of both structures. The elastic panel exhibits natural vibration frequencies that align with the ones of the natural oscillations of the shock-wave. Wind-tunnel experiments reveal strong dynamic coupling between the elastic panel and the shock-wave, leading to large-amplitude, synchronized oscillations when the shock is centered on the panel. In contrast, the viscoelastic panel is designed to avoid the fluid–structure coupling observed in the elastic panel. The marked viscoelastic properties of the material shift the natural vibration modes to higher frequencies, outside the shock-wave’s natural oscillation range. As a result, in its interaction with the shock-wave, the viscoelastic panel exhibits only a large static deformation – greater than that of the elastic panel – without any dynamic fluid–structure coupling, regardless of the shock position. These findings demonstrate that viscoelastic materials hold significant potential for flow control applications, providing structural damping and frequency-dependent stiffening, which effectively decouple static deformation from dynamic interaction. Our results suggest that viscoelastic panels could be optimized as adaptive bumps for shock control, responding to fluid dynamics without inducing unwanted dynamic coupling.</div></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":"137 ","pages":"Article 104335"},"PeriodicalIF":3.4,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0