Engineering Analysis with Boundary Elements最新文献_第9页

Sphere elements in the BEM for the analysis of elastic bodies with spherical voids or inclusions 边界元法中用于分析具有球形空隙或夹杂的弹性体的球面元

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106057

Yong-Tong Zheng , Yijun Liu , Xiao-Wei Gao , Wei-Zhe Feng

{"title":"Sphere elements in the BEM for the analysis of elastic bodies with spherical voids or inclusions","authors":"Yong-Tong Zheng , Yijun Liu , Xiao-Wei Gao , Wei-Zhe Feng","doi":"10.1016/j.enganabound.2024.106057","DOIUrl":"10.1016/j.enganabound.2024.106057","url":null,"abstract":"<div><div>In this paper, a series of novel sphere elements are proposed in the boundary element method (BEM). These elements are designed as isoparametric closure elements to simulate spherical geometries with greater accuracy and fewer nodes than conventional boundary elements. Constructed similarly to multi-dimensional Lagrange elements, these sphere elements utilize trigonometric bases for each dimension. To avoid zero Jacobians at polar nodes, poleless sphere elements combined with triangular elements are employed to approximate spheres. The evaluation methods of boundary integrals over these elements, including singular and nearly singular integrals, are derived using degenerated element techniques and adaptive subdivision techniques, respectively. Three numerical examples are employed to underscore the advantages of the proposed elements, showing that with only 50 nodes per sphere, results align closely with those obtained using 290 nodes per sphere with conventional boundary elements, effectively reducing degrees of freedom without sacrificing accuracy.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106057"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793490","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

Integrating GA-BEM and polynomial fitting for efficient structural shape optimization 结合GA-BEM和多项式拟合进行结构形状优化

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106105

Alexandre Tachibana dos Santos, José Antonio Marques Carrer

{"title":"Integrating GA-BEM and polynomial fitting for efficient structural shape optimization","authors":"Alexandre Tachibana dos Santos, José Antonio Marques Carrer","doi":"10.1016/j.enganabound.2024.106105","DOIUrl":"10.1016/j.enganabound.2024.106105","url":null,"abstract":"<div><div>This paper presents a novel simplified approach to achieving smooth boundaries on structural shape optimizations when combining Genetic Algorithms (GA) with the Boundary Element Method (BEM) by applying a simple polynomial fitting technique for boundary smoothing. The methodology focuses on the challenges of reducing material usage while maintaining constructability. The integration of polynomial fitting for boundary smoothing mitigates the complexity often resulting from GA-based optimizations, while keeping the complexity of implementation low when compared to other boundary smoothing techniques. Case studies are used to demonstrate the effectiveness of this approach in reducing material usage while following stress and displacement constraints. Comparative analysis with existing methods, such as Isogeometric Analysis-BEM with Particle Swarm Optimization, highlights the efficiency and implementation simplicity of the proposed technique. The results show significant improvements in structural performance and material reduction, demonstrating that the method can be used as a valid tool for structural shape optimization.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106105"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929255","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

The radial point interpolation method and mixed-mode energy release rate criterion for crack growth in single lap joints 单搭接节点裂纹扩展的径向点插值法和混合模式能量释放率准则

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106095

D.C. Gonçalves , L.D.C. Ramalho , R.D.S.G. Campilho , J. Belinha

引用次数: 0

A fast multipole boundary element method for acoustic problems in a non-uniform potential flow 非均匀位流声学问题的快速多极边界元方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106091

Xueliang Liu , Haijun Wu

{"title":"A fast multipole boundary element method for acoustic problems in a non-uniform potential flow","authors":"Xueliang Liu , Haijun Wu","doi":"10.1016/j.enganabound.2024.106091","DOIUrl":"10.1016/j.enganabound.2024.106091","url":null,"abstract":"<div><div>This paper presents a fast multipole boundary element method (FMBEM) for acoustic problems in a non-uniform potential flow. Different from the BEM for acoustic problems in a quiescent medium, the non-uniform flow field has a dramatic effect on the propagation of sound. In the developed algorithm, only the Mach number of the flow field at infinity needs to be given, and both the non-uniform flow field and the sound field around the vibrating model are calculated by using the BEM. First, the FMBEM for the steady non-uniform potential flow is developed. The exponential expansions of the multipole translation and recurrence calculations of the solid harmonic functions are employed to accelerate the computation. The calculated physical quantity of the non-uniform flow can serve as the computational input for the subsequent sound field. Then, the boundary integral formulae for acoustic problems in non-uniform potential flows are derived. The convected Green's function is also derived by using the Taylor-Lorentz transformation and its inverse transformation. The formulae of fast multipole translations are derived in detail. Finally, several numerical experiments are performed to validate the accuracy and efficiency of the algorithm, demonstrating its capability for accurate and fast computation of large-scale sound fields in non-uniform flows.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106091"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929267","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

NL-SBFEM: A pure SBFEM formulation for geometrically and materially nonlinear problems NL-SBFEM：用于几何和材料非线性问题的纯SBFEM公式

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106085

Seyed Sadjad Abedi-Shahri, Farzan Ghalichi, Iman Zoljanahi Oskui

{"title":"NL-SBFEM: A pure SBFEM formulation for geometrically and materially nonlinear problems","authors":"Seyed Sadjad Abedi-Shahri, Farzan Ghalichi, Iman Zoljanahi Oskui","doi":"10.1016/j.enganabound.2024.106085","DOIUrl":"10.1016/j.enganabound.2024.106085","url":null,"abstract":"<div><div>In the context of numerical methods for solving partial differential equations, the research presented in this article introduces a pioneering Scaled Boundary Finite Element Method (SBFEM) formulation designed to tackle geometrically and materially nonlinear problems. The novel formulation, named NL-SBFEM, utilizes the deformation gradient and the first Piola–Kirchhoff stress, and is distinguished by its purity as a standalone SBFEM formulation without the need for integration with other numerical methods, thereby preserving all the inherent advantages of SBFEM. This research thoroughly validates the NL-SBFEM, demonstrating its accuracy and reliability when compared to analytical solutions and results obtained using conventional numerical methods. The method accommodates well-established hyperelastic material models while benefits from the ease of integrating new hyperelastic material models within the framework. With its capability to address nonlinear problems, the proposed development can introduce SBFEM as an alternative to FEM in the field of computational biomechanics.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106085"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929268","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 novel spatial-temporal collocation solver for long-time transient diffusion with time-varying source terms 具有时变源项的长时间瞬态扩散的一种新的时空搭配求解器

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106060

Wenzhi Xu , Zhuojia Fu , Qiang Xi , Qingguo Liu , Božidar Šarler

{"title":"A novel spatial-temporal collocation solver for long-time transient diffusion with time-varying source terms","authors":"Wenzhi Xu , Zhuojia Fu , Qiang Xi , Qingguo Liu , Božidar Šarler","doi":"10.1016/j.enganabound.2024.106060","DOIUrl":"10.1016/j.enganabound.2024.106060","url":null,"abstract":"<div><div>In this paper, a novel spatial-temporal collocation solver is proposed for the solution of 2D and 3D long-time diffusion problems with source terms varying over time. In the present collocation solver, a series of semi-analytical spatial-temporal fundamental solutions are used to approximate the solutions of the time-dependent diffusion equations with only the node discretization of the initial and boundary conditions. This approach avoids the numerical inverse Laplace/Fourier transformations or the selection of the time-step size in the traditional time discretization methods (Laplace/Fourier transformations and time-stepping scheme, etc.). To treat with the time-varying source terms, an extension of the multiple reciprocity method from the spatial domain to the spatial-temporal domain is achieved, which converts the nonhomogeneous governing equation into a high-order partial differential equation via a series of differential operators without the need for additional discretization in the spatial-temporal domain. Several numerical examples validate the feasibility, efficiency and accuracy of the proposed solver.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106060"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793485","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

Dual-branch neural operator for enhanced out-of-distribution generalization 增强分布外泛化的双分支神经算子

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106082

Jiacheng Li, Min Yang

{"title":"Dual-branch neural operator for enhanced out-of-distribution generalization","authors":"Jiacheng Li, Min Yang","doi":"10.1016/j.enganabound.2024.106082","DOIUrl":"10.1016/j.enganabound.2024.106082","url":null,"abstract":"<div><div>Neural operators, which learn mappings between function spaces, offer an efficient alternative for solving partial differential equations. However, their generalization to out-of-distribution (OOD) parameters often falls short, with accuracy rapidly decreasing outside the training domain. To tackle this issue, we propose a dual-branch neural operator architecture. In this setup, the in-distribution branch performs supervised learning from training data and transfers its learned knowledge to the OOD branch. The OOD branch then uses pseudo-solutions provided by the in-distribution branch to enhance the generalization capability of the neural operator. To ensure the OOD branch prioritizes more reliable information, we introduce a weighting method to control the contributions of different pseudo-solutions. Experimental results show that our method can improve OOD accuracy of neural operators while maintaining in-distribution prediction performance with a few or even no additional OOD observations. The code is publicly available at <span><span>https://github.com/JcLimath/DB-NO</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106082"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901666","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 analysis of basin response using Indirect Boundary Element Method (IBEM) for dip-slip sources 倾斜滑源盆地响应的间接边界元法数值分析

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106081

Zhonghan Liu , Zhenning Ba , Jingxuan Zhao , Jiaqi Niu

{"title":"Numerical analysis of basin response using Indirect Boundary Element Method (IBEM) for dip-slip sources","authors":"Zhonghan Liu , Zhenning Ba , Jingxuan Zhao , Jiaqi Niu","doi":"10.1016/j.enganabound.2024.106081","DOIUrl":"10.1016/j.enganabound.2024.106081","url":null,"abstract":"<div><div>Accurate modeling of basin structures and quantitative analysis of basin amplification effects are critical for seismologists and engineers. The Indirect Boundary Element Method (IBEM), developed from the Boundary Element Method (BEM), is particularly well-suited for these tasks due to its capability to manage layers with lateral inhomogeneities. However, current IBEM studies mostly focus on wavefields generated by plane wave incidence or point sources emitting pure spherical P or S waves, which often fail to capture the complex behavior of real seismic events. To address this limitation, we propose an updated IBEM scheme that simulates wavefields from dip-slip sources using the displacement-stress discontinuity vector. We validate this updated IBEM through degenerated models and sources, confirming its robustness in handling dip-slip sources. Further numerical tests reveal several features of basin amplification effects from dip-slip sources: (1) Sources with varying dips cause substantial differences in-basin peak numbers and amplitudes compared to simplified sources. For the surface responses, the ratio of maximum amplitudes (in-basin to out-of-basin) can exceed 10 with asymmetric distributed peaks. (2) The basin amplification effect for dip-slip sources shows similar frequency and velocity contrast dependencies compared to other simplified sources. Our study shows the IBEM scheme is effective and advantageous in basin amplification effect analysis, especially for different source configurations under the same model, with great potential for further applications for seismology, earthquake engineering, and hazard control.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106081"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825005","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 element mapping material point method for tracking interfaces in transient nonlinear heat conduction with sources 带源的瞬态非线性热传导界面的单元映射质点跟踪方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106106

Peiwen Wu , Weidong Chen , Shengzhuo Lu , Jingxin Ma , Mingwu Sun , Bo Sun , Shibo Wu

{"title":"An element mapping material point method for tracking interfaces in transient nonlinear heat conduction with sources","authors":"Peiwen Wu , Weidong Chen , Shengzhuo Lu , Jingxin Ma , Mingwu Sun , Bo Sun , Shibo Wu","doi":"10.1016/j.enganabound.2024.106106","DOIUrl":"10.1016/j.enganabound.2024.106106","url":null,"abstract":"<div><div>The Generalized Interpolation Material Point method (GIMP), based on both material-point discretization and Eulerian space meshing, which is appropriate for nonlinear problems. However, it is difficult to identify physical boundaries and material interfaces, leading to numerical oscillations in the thermal analysis. Therefore, an Element Mapping Material Point method (EMMP) is proposed to handle with the deficiency. EMMP redesigns a particle-element mapping algorithm for transmitting the information through physical and numerical fields, deduces an efficient solution scheme for the control equation system, proposes an approach for identifying boundary and interface, as well as a method for marking elements with the information of loads and constraints. There are four numerical examples of heat conduction under various scenarios, validating the thermal analysis performance of EMMP. The results indicate that EMMP is capable of solving transient nonlinear heat conduction problems with high boundary resolution and numerical stability, effectively avoiding temperature oscillations throughout the field. It is observed that EMMP is approximately 36% and 68% more efficient than the Finite Element method (FEM) and GIMP, respectively. Additionally, EMMP maintains relative errors within the order of 10<sup>−5</sup> compared to analytical solutions. It is also verified that EMMP is proficient in simulating the phase transition and ignition processes of the energetic material, HMX, subjected to the thermal contact load.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106106"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929254","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 energy-stable Runge–Kutta relaxation schemes for the Bi-flux diffusion model 双通量扩散模型的线性能量稳定龙格-库塔弛豫格式

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106087

Jiayue Xu , Cong Xie , Maosheng Jiang

引用次数: 0