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

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

A peridynamic method for creep and stress relaxation incorporating a novel fractional viscoelastic model 结合新型分数黏弹性模型的蠕变和应力松弛的周动力方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106104

Guosheng Wang , Wenwen He , Dechun Lu , Zhiqiang Song , Xiuli Du

{"title":"A peridynamic method for creep and stress relaxation incorporating a novel fractional viscoelastic model","authors":"Guosheng Wang , Wenwen He , Dechun Lu , Zhiqiang Song , Xiuli Du","doi":"10.1016/j.enganabound.2024.106104","DOIUrl":"10.1016/j.enganabound.2024.106104","url":null,"abstract":"<div><div>A fractional viscoelastic kernel function is proposed to describe the modulus evolution during the creep and stress relaxation behavior of quasi-brittle materials. A unified fractional viscoelastic model for creep and stress relaxation is further developed, which has the advantages of few parameters and high accuracy. The model can be degenerated into the basic viscoelastic models under different values of fractional order. The relationship between the force state in non-ordinary state-based peridynamics and the stress tensor in the continuum mechanics constitutive model is established. The developed fractional viscoelastic model is then integrated into the peridynamic framework to create a unified creep and stress relaxation peridynamic method. The calibration method of the model parameters is also determined through the equivalence of the peridynamics and the continuum mechanics, and the influence rules of parameters on the viscoelastic behavior of materials are discussed. The effectiveness of the proposed peridynamic method is verified by numerical simulations of a plate, bar, slate, and beam. The proposed method can accurately describe the deformation process from continuous to discontinuous in creep and stress relaxation. This study provides a valuable numerical tool for simulating structural damage caused by creep and stress relaxation in engineering structures during long-term operation.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106104"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929261","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

Electromagnetic-thermal coupling simulation in high temperature superconducting bulk by peridynamic differential operator 高温超导体中电磁-热耦合的周动力微分算子模拟

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106097

Shouhong Shan , Huadong Yong , Youhe Zhou

{"title":"Electromagnetic-thermal coupling simulation in high temperature superconducting bulk by peridynamic differential operator","authors":"Shouhong Shan , Huadong Yong , Youhe Zhou","doi":"10.1016/j.enganabound.2024.106097","DOIUrl":"10.1016/j.enganabound.2024.106097","url":null,"abstract":"<div><div>The high temperature superconducting (HTS) bulk can operate in the liquid nitrogen temperature. A useful model describing superconductivity for engineering applications links electric field and current density, namely as E-J power law. Since the exponent of the E-J power law is usually set as 20∼50, the distribution of current density changes dramatically between the penetrated and unpenetrated regions, which brings a challenge to the numerical accuracy and convergence of the calculation. Furthermore, in order to simulate the heat transfer behavior between HTS bulk and its ambient environment during operation, the nonlinear flux boundary condition of temperature is employed. The peridynamic differential operator (PDDO) is a powerful tool to solve the mathematical model with PDEs. Utilizing the theory of the PDDO, the spatial partial derivative in the PDEs is converted into a corresponding non-local form. To verify our model, a comparison between the numerical results solved by the PDDO and finite element method is carried out. Finally, the effects of the global and local non-uniformity of critical current and thermal perturbation on the electromagnetic and thermal behaviors of the HTS bulk in the multi-pulsed field magnetization process are simulated.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106097"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929265","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