Engineering Analysis with Boundary Elements最新文献_第6页

High accuracy analysis of three-dimensional axisymmetric nonlinear boundary integral equations 三维轴对称非线性边界积分方程的高精度分析

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-21 DOI: 10.1016/j.enganabound.2025.106220

Hu Li , Jin Huang

引用次数: 0

An online reduced-order method for dynamic sensitivity analysis 动态灵敏度分析的在线降阶方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-21 DOI: 10.1016/j.enganabound.2025.106198

Shuhao Li , Jichao Yin , Yaya Zhang , Hu Wang

{"title":"An online reduced-order method for dynamic sensitivity analysis","authors":"Shuhao Li , Jichao Yin , Yaya Zhang , Hu Wang","doi":"10.1016/j.enganabound.2025.106198","DOIUrl":"10.1016/j.enganabound.2025.106198","url":null,"abstract":"<div><div>This study introduces an online reduced-order methodology designed to avoid the need for generating additional samples during the offline phase, a requirement typically associated with the classical reduced basis method. The proposed methodology is implemented for accelerating the sensitivity analysis in the dynamic topology optimization. The dominant Proper Orthogonal Mode (POM) of the adjoint sensitivity solution is initialized by Proper Orthogonal Decomposition (POD). Sequentially, in the incremental Singular Value Decomposition (SVD) approach, the truncated strategy is utilized to enable the algorithm to efficiently update the basis functions. Furthermore, a novel self-learning Temporal Convolutional Neural Network (TCN)-based error predictive model has been built for the presented reduced-order method, aimed at predicting the true error. This advancement facilitates the adaptive construction of the reduced basis functions. Finally, the effectiveness of the algorithm in terms of computational efficiency and accuracy is demonstrated by means of numerical results, and the proposed error estimation is also verified.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106198"},"PeriodicalIF":4.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678238","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

Seismic evaluation of arbitrary number of buildings resting on a layered half-space under incident Rayleigh waves Rayleigh波入射下层状半空间上任意数量建筑物的地震评价

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-21 DOI: 10.1016/j.enganabound.2025.106226

Zhenning Ba , Feixiang Yu , Chenyang Kuo , Zhonghan Liu , Jianwen Liang

{"title":"Seismic evaluation of arbitrary number of buildings resting on a layered half-space under incident Rayleigh waves","authors":"Zhenning Ba , Feixiang Yu , Chenyang Kuo , Zhonghan Liu , Jianwen Liang","doi":"10.1016/j.enganabound.2025.106226","DOIUrl":"10.1016/j.enganabound.2025.106226","url":null,"abstract":"<div><div>Understanding the Site-City Interaction (SCI) induced by surface wave is vital for accurate seismic analysis and urban planning. Based on the elastodynamics theory and wave equations, this paper proposes a semi-analytical method to investigate SCI effect induced by Rayleigh wave. The proposed approach integrates the Dynamic Stiffness Matrix Method (DSMM) with substructure method, and can effectively model the complex interplay between seismic surface waves, layered half-space, and arbitrary distributed buildings. The feasibility of the proposed method is validated through comparison with numerical results obtained from the Finite Element Method (FEM). Compared with some numerical methods, our method can be easily implemented and does not require artificial boundaries or seismic motion input methods. Furthermore, to demonstrate the applicability for different cases, the analysis of the impact of incident waves with different frequency bandwidths and energy distributions, as well as the effects of different soil layer characteristics on the SCI effect, are conducted. The results indicate that the proposed method can effectively address the structural response and site variation characteristics within a specific area under complex conditions. Given its capabilities, the proposed method has the potential to be a powerful predictive tool for enhancing urban resilience by offering comprehensive seismic risk assessments and targeted hazard mitigation strategies associated with Rayleigh waves.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106226"},"PeriodicalIF":4.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678237","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

Development of a fully non-linear circular numerical wave basin based on the HOBEM and omni-controlling sources 基于HOBEM和全控源的全非线性圆形数值波盆的开发

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-19 DOI: 10.1016/j.enganabound.2025.106223

Lei Fu , Dezhi Ning , Deborah Greaves , Lars Johanning

{"title":"Development of a fully non-linear circular numerical wave basin based on the HOBEM and omni-controlling sources","authors":"Lei Fu , Dezhi Ning , Deborah Greaves , Lars Johanning","doi":"10.1016/j.enganabound.2025.106223","DOIUrl":"10.1016/j.enganabound.2025.106223","url":null,"abstract":"<div><div>A novel fully nonlinear circular numerical wave basin is developed based on potential flow theory and high-order boundary element methods (HOBEM). By controlling the vector input of wave velocity from wave-making sources uniformly distributed on the three-dimensional cylindrical surface, the wave basin is capable of generating waves in all directions. The wave basin is used to simulate nonlinear waves, including uni-directional, multi-directional, and even omni-directional focused waves. These waves as typical cases demonstrate the advantages of the wave basin generating multi-directional, multi-frequency waves and localized distorted waves. The results show that the fully nonlinear free-surface boundary conditions allow the wave basin to capture higher-order wave components during the propagation and deformation of stronger nonlinear waves. The annular artificial damping layer effectively absorbs wave energy from all directions, ensuring the stability of the simulation by mitigating spurious reflections. This fully nonlinear numerical wave basin overcomes the limitations of traditional wave tanks regarding wave direction angles.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106223"},"PeriodicalIF":4.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678239","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

BEM solution for scattering of water waves by dual thick rigid structures over non-periodic bottom morphologies 双厚刚性结构在非周期底形态上水波散射的边界元解

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-19 DOI: 10.1016/j.enganabound.2025.106216

Nidhi Sharma, Deepali Goyal, S.C. Martha

{"title":"BEM solution for scattering of water waves by dual thick rigid structures over non-periodic bottom morphologies","authors":"Nidhi Sharma, Deepali Goyal, S.C. Martha","doi":"10.1016/j.enganabound.2025.106216","DOIUrl":"10.1016/j.enganabound.2025.106216","url":null,"abstract":"<div><div>The combined effect of dual rigid structures over non-periodic bottom morphologies is examined through a boundary value problem to characterize the scattering phenomenon. Three different types of bottom morphologies: (a) monotonically decreasing oscillatory, (b) exponential decreasing oscillatory and (c) Gaussian oscillatory are taken into consideration. Utilizing the boundary element method (BEM), the boundary value problem coins to a system of algebraic equations that can be solved numerically to determine the physical quantities such as reflection and transmission coefficients. The reflection coefficient is compared to the results available in the literature, and a good agreement is found, indicating the validity of the current approach. Reflection is seen to increase with the decay factor, number of ripples, and width of the structures. Interestingly, a split in the Bragg peak is noted which increases with increasing gap and number of ripples but decreases with increasing in decay factor and submergence depth of both structures. Zeros in reflection are vanished due to the presence of both structures. It is found that Bragg resonance is observed for all three bottom profiles Comparison analysis between monotonically decreasing profile, Gaussian profile and exponentially decreasing profile is made which portrays that the Bragg peak is highest for monotonically decreasing oscillatory profile. This model is an attempt to create a tranquil zone utilizing breakwaters.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106216"},"PeriodicalIF":4.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654730","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

Linear and nonlinear transient response of sandwich beams made of FG-GPLRC faces and FGP core under moving distributed masses 运动分布质量作用下FG-GPLRC面板和FGP芯芯夹层梁的线性和非线性瞬态响应

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-18 DOI: 10.1016/j.enganabound.2025.106221

Nuttawit Wattanasakulpong , Wachirawit Songsuwan

{"title":"Linear and nonlinear transient response of sandwich beams made of FG-GPLRC faces and FGP core under moving distributed masses","authors":"Nuttawit Wattanasakulpong , Wachirawit Songsuwan","doi":"10.1016/j.enganabound.2025.106221","DOIUrl":"10.1016/j.enganabound.2025.106221","url":null,"abstract":"<div><div>This study considers transient response of sandwich beams produced from functionally graded graphene platelets-reinforced composite faces and functionally graded porous core under the action of various types of moving distributed masses. The equations of motion are developed by the energy method using a von Kármán type nonlinear strain-displacement relationship. Different micromechanical models are modified to approximate the effective material properties at the faces and the core. In order to solve the nonlinear system of this problem, the Newton–Raphson iteration procedure, time-integration of Newmark, and the Chebyshev-Ritz method work together to solve the transient response of the beams related to different parameters, such as material distribution, moving mass distribution, mass distance, and others. Our research indicates that sandwich beams composed of a functionally graded porous core (Type 2) and a FG-V distribution of graphene platelets at the faces have demonstrated a remarkable capacity to tolerate dynamic deformation.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106221"},"PeriodicalIF":4.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642473","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

Synthetic seismograms in transversely isotropic and elastic media below ocean floor 海底横向各向同性和弹性介质中的合成地震记录

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-18 DOI: 10.1016/j.enganabound.2025.106218

Jiangcun Zhou , Ernian Pan , Zhiqing Zhang

引用次数: 0

H2-matrices for translation-invariant kernel functions 平移不变核函数的 H2 矩阵

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-15 DOI: 10.1016/j.enganabound.2025.106190

Steffen Börm, Janne Henningsen

{"title":"H2-matrices for translation-invariant kernel functions","authors":"Steffen Börm, Janne Henningsen","doi":"10.1016/j.enganabound.2025.106190","DOIUrl":"10.1016/j.enganabound.2025.106190","url":null,"abstract":"<div><div>Boundary element methods for elliptic partial differential equations typically lead to boundary integral operators with translation-invariant kernel functions. Taking advantage of this property is not straightforward if general unstructured meshes and general basis functions are used, since we need the supports of these basis functions to be contained in a hierarchy of subdomains with translational symmetry.</div><div>In this article, we present a modified construction for <span><math><msup><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>-matrices on unstructured quasi-uniform meshes that uses translation-invariance to significantly reduce the storage requirements for the farfield representation.</div><div>We construct a nested hierarchy of axis-parallel boxes so that translational symmetry is preserved and prove optimal-order complexity estimates under moderate assumptions. In particular, we need only one weak assumption for proving that the entire farfield requires only <span><math><mrow><mi>O</mi><mrow><mo>(</mo><mo>log</mo><mrow><mo>(</mo><mi>n</mi><mo>)</mo></mrow><mo>)</mo></mrow></mrow></math></span> coefficients.</div><div>It should be mentioned that, since we are working with an unstructured mesh and general basis functions, the nearfield of the matrix still requires <span><math><mrow><mi>O</mi><mrow><mo>(</mo><mi>n</mi><mo>)</mo></mrow></mrow></math></span> units of storage.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106190"},"PeriodicalIF":4.2,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Perfectly Matched Layer for meshless analysis of wave propagation in layered elastic-poroelastic half-space 层状弹性-孔隙弹性半空间中无网格波传播分析的完美匹配层

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-14 DOI: 10.1016/j.enganabound.2025.106194

Kamal Shaker, Morteza Eskandari-Ghadi, Soheil Mohammadi

{"title":"Perfectly Matched Layer for meshless analysis of wave propagation in layered elastic-poroelastic half-space","authors":"Kamal Shaker, Morteza Eskandari-Ghadi, Soheil Mohammadi","doi":"10.1016/j.enganabound.2025.106194","DOIUrl":"10.1016/j.enganabound.2025.106194","url":null,"abstract":"<div><div>Dynamic response of a transversely isotropic layered half-space composed of alternatively arbitrary poroelastic and elastic materials is numerically investigated through the Meshless Local Petrov–Galerkin (MLPG) method. The governing equations of the porous layers are the <span><math><mrow><mi>u</mi><mo>−</mo><mi>p</mi></mrow></math></span> formulation of the Biot’s theory, and the equations of motion for single-phase elastic media are considered for pure elastic layers. Furthermore, the Perfectly Matched Layer (PML) concepts are utilized to prepare the geometry of unbounded domain for the numerical analysis. In this regard, the stretched coordinates in PML are introduced in such a way that the truncating procedure does not affect the responses in an arbitrary part of the truncated domain. The continuity condition at the interface of adjacent layers, which may be either elastic-elastic, elastic-poroelastic, or poroelastic-poroelastic, and the jump condition on the excitation area are directly and precisely imposed to the inhomogeneous media. As the error estimation is an indispensable part of the numerical analysis, the <span><math><msub><mrow><mi>L</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>-norm of error is used to assess the truncated model and control the numerical results. To show the validity of the solution, the numerical evaluation for homogeneous case is compared with the analytical solution. For the inhomogeneous media, the layers can be defined based on some fictitious interfaces to have several homogeneous bodies.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106194"},"PeriodicalIF":4.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620556","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

Multiphase Lagrangian Differencing Dynamics method with sharp interfaces 具有锐界面的多相拉格朗日差分动力学方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-03-14 DOI: 10.1016/j.enganabound.2025.106197

Manigandan Paneer , Josip Bašić , Damir Sedlar , Chong Peng

{"title":"Multiphase Lagrangian Differencing Dynamics method with sharp interfaces","authors":"Manigandan Paneer , Josip Bašić , Damir Sedlar , Chong Peng","doi":"10.1016/j.enganabound.2025.106197","DOIUrl":"10.1016/j.enganabound.2025.106197","url":null,"abstract":"<div><div>Multiphase flow simulations are complex due to the intricate interactions between phases when high density and viscosity ratios are involved. These complexities often lead to challenges in capturing sharp interfaces and managing pressure jumps across phases, which can induce numerical instability. Extending the Lagrangian Differencing Dynamics (LDD) method which differs from other meshless methods by using a unique approximation scheme that ensures accurate gradients and Laplacians with second-order consistency, prioritizing consistency over traditional conservation-first approaches and also works directly on the surface meshes. This paper presents a novel Multiphase Lagrangian Differencing Dynamics (MP-LDD) with a sharp interface without density and viscosity diffusion at the interface. The method incorporates several key techniques to address the challenges: introduced a second-order consistency variable coefficient Laplacian operator for discretizing pressure and velocity equations to handle varying densities and viscosities; a systematic approach to point-cloud regularization using Position Based Dynamics (PBD) for the multiphase framework that integrates the Atwood number and increase/decrease of density to ensure a sharp and stable interface, for simulating flows with high-density ratios and mitigating unintended mixing between immiscible fluids at the interface. The Lagrangian CFL criterion is also employed for automatic time-stepping, facilitating larger time steps and accelerating simulations while maintaining numerical stability. The effectiveness of the MP-LDD approach is demonstrated through validation against various benchmark cases, including 2D Rayleigh–Taylor instability for low-density ratio, dam break & sloshing for high-density ratio & violent flows. Also, oil injection into the water scenario showcases high-density and viscosity fluids.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"175 ","pages":"Article 106197"},"PeriodicalIF":4.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620558","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