Engineering Analysis with Boundary Elements最新文献_第5页

A new procedure for solving the transport of corrosion products in liquid lead bismuth eutectic loop 求解液态铅铋共晶回路中腐蚀产物输运的新方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106107

YaoDi Li , Mei Huang , Boxue Wang , Xiangyuan Meng , YanTing Cheng

{"title":"A new procedure for solving the transport of corrosion products in liquid lead bismuth eutectic loop","authors":"YaoDi Li , Mei Huang , Boxue Wang , Xiangyuan Meng , YanTing Cheng","doi":"10.1016/j.enganabound.2024.106107","DOIUrl":"10.1016/j.enganabound.2024.106107","url":null,"abstract":"<div><div>This article presents an extension of the Half Boundary Method (HBM) for solving two-dimensional mass transfer problems in a lead-bismuth eutectic (LBE) loop. We propose a procedure that integrates the Finite Volume Method (FVM) with the HBM coupling algorithm to address flow and mass transfer issues. The FVM is used to solve the velocity field, while a small number of nodes are selected within the solution domain to apply HBM for solving the concentration field. By reducing the number of grids required by HBM, the maximum order of the matrix is also reduced, leading to savings in computational storage and improved efficiency. The proposed procedure is applied to solve the transport problem of corrosion products (Fe) in the hot pipe section of the UPBEAT circuit. By comparing different flow and oxygen control conditions, we find that the corrosion rate increases with velocity. Under oxygen control, the concentration of corrosion products is only 0.5 % of that under anaerobic conditions, and the corrosion rate is reduced to only 0.19 %. These findings significantly reduce the corrosion rate, making long-term pipeline use feasible.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106107"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929266","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

Multi-patch IGA associated with Nitsche’s method for morphogenesis of complex free-form surface 多斑块IGA与Nitsche的复杂自由曲面形态形成方法相关

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106101

Ziling Song , Tiantang Yu , Lin Wang , Tinh Quoc Bui

{"title":"Multi-patch IGA associated with Nitsche’s method for morphogenesis of complex free-form surface","authors":"Ziling Song , Tiantang Yu , Lin Wang , Tinh Quoc Bui","doi":"10.1016/j.enganabound.2024.106101","DOIUrl":"10.1016/j.enganabound.2024.106101","url":null,"abstract":"<div><div>The analysis of complex multipatch structures has been solved with numerical tools, however, isogeometric shape optimization has not yet been applicable for designing free-form surface. Benefiting from the key concept of isogeometric analysis (IGA) for integration of design and analysis, a morphogenesis method is presented for shape optimization of complex free-form surfaces, especially built with multipatches. The optimization is based on control points’ information to adjust the nodal positions to achieve a structure with the minimum strain energy by particle swarm optimization. In this setting, the constraints of control point on both sides are used to connect interfaces between patches during shape modifications. For the analysis, we introduce the Kirchhoff–Love shell element and Nitsche’s method to couple non-conforming patches. The NURBS composition defines the geometry of the shell while the displacement field is approximated using the same spline functions as the free-form surface. The effectiveness and performance of the proposed method are verified by some numerical examples, and the mechanical properties of the optimized structure are greatly improved.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106101"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974915","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 time-domain BEM for instantaneous interaction by two ships head-on encountering in incident waves

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2025.106128

Xiao Zhang , Yong Cheng , Saishuai Dai , Mingxin Li , Zhiming Yuan , Atilla Incecik

{"title":"A time-domain BEM for instantaneous interaction by two ships head-on encountering in incident waves","authors":"Xiao Zhang , Yong Cheng , Saishuai Dai , Mingxin Li , Zhiming Yuan , Atilla Incecik","doi":"10.1016/j.enganabound.2025.106128","DOIUrl":"10.1016/j.enganabound.2025.106128","url":null,"abstract":"<div><div>Multi-ship encountering results in complex interactions that significantly modify the surrounding flow field, particularly in the presence of incident waves. Due to the disturbing effect of the complex wave system, the behavior of each ship during the encounter is influenced by the wave characteristics and the relative motions between the ships. This paper establishes a model for ship-to-ship encountering in incident waves using the time-domain Rankine Boundary Element Method (BEM). The transient responses and wave field of ships are investigated. The approach is based on the global fixed system dealing with complex external wavefields and dynamics, moment-to-moment iterative updating of the computational grid simulates the two-ship encountering, using the fourth-order Runge-Kutta method for time integration. The classical Wigley III is chosen to calculate and better validate the numerical results for a two-ship encountering in calm water and a single-ship advancing in an incident wave based on the time-domain method. On this basis, a study is carried out to investigate the transient motion and instantaneous wave field of two ships encountering toward an opposite direction in incident waves. Sensitivity analyses of parameters such as wave characteristics, transverse distance between ships, ship-to-ship speed ratio, and water depths reveal that the transient motions of ships are closely related to the incident wave characteristics. Notably, the encounter frequency differs when two ships advance in opposing directions, with variations in transverse distance, speed ratio and water depths significantly affecting the amplitude and frequency of their motions during the encounter.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"172 ","pages":"Article 106128"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077706","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

Phase-field modeling for curvature-dependent tissue growth on surfaces 曲面上曲率相关组织生长的相场建模

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106090

Soobin Kwak , Yongho Choi , Jian Wang , Yunjae Nam , Junseok Kim

引用次数: 0

Flexoelectricity in bimaterials via boundary element analysis

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106109

Arezoo Hajesfandiari

{"title":"Flexoelectricity in bimaterials via boundary element analysis","authors":"Arezoo Hajesfandiari","doi":"10.1016/j.enganabound.2024.106109","DOIUrl":"10.1016/j.enganabound.2024.106109","url":null,"abstract":"<div><div>A boundary element formulation is developed based on consistent couple stress flexoelectricity. The formulation is used here to study the flexoelectric response of a two-dimensional isotropic bimaterial consisting of a flexoelectric dielectric thin film on a non-flexoelectric dielectric material. Flexoelectric phenomenon is a coupled problem of mechanical and electrostatic effects, each specified by only one parameter in the formulation: couple-stress parameter <span><math><mi>η</mi></math></span>, and flexoelectric coefficient <span><math><mi>f</mi></math></span>, respectively. The primary variables in the boundary element analysis are displacement, rotation, and electric potential, while the secondary variables are force- and couple-tractions and normal electric displacement. In order to investigate the flexoelectric response in such bimaterials and validate the formulation and the numerical technique, a long rectangular bimaterial strip is considered as an initial case study. Then, the flexoelectric responses in a bimaterial semi-circular strip and a bimaterial solid cylinder are explored using the same implementation.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106109"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049720","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

Identification of elastic edge parameters of plates using the method of fundamental solutions 用基本解法辨识板的弹性边参数

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106093

Ehsan Samandizade , Mohammad-Rahim Hematiyan , Yui-Chuin Shiah

{"title":"Identification of elastic edge parameters of plates using the method of fundamental solutions","authors":"Ehsan Samandizade , Mohammad-Rahim Hematiyan , Yui-Chuin Shiah","doi":"10.1016/j.enganabound.2024.106093","DOIUrl":"10.1016/j.enganabound.2024.106093","url":null,"abstract":"<div><div>Free, fixed (clamped), and simply supported boundary conditions are standard edge boundary conditions that are normally considered in the modeling and analysis of plates. In many cases, the edge support of the plate is elastic, which cannot be modeled using the standard edge boundary conditions. To model the elastic edge of a plate, some parameters need to be determined. The aim of this study is to determine the elastic edge parameters of Reissner thick plates using inverse analysis. For the direct problem of a plate with an elastic edge, the method of fundamental solutions (MFS) formulated with the first-order shear deformation theory is used. An inverse method for determining the elastic edge parameters using measured displacements is presented. A gradient-based method is used for the optimization process in the inverse analysis. For the sensitivity analysis of elastic parameters, an analytical method based on the differentiation of governing equations is proposed. Two numerical examples for identifying elastic edge parameters in plates are presented and the effects of important parameters on the results are also investigated. Based on the results obtained, it is found that the proposed inverse method is very effective in identifying the elastic edge parameters.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106093"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901663","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 local meshless numerical scheme based on the radial point interpolation for the generalized time-fractional Allen–Cahn equation 基于径向点插值的广义时间分数阶Allen-Cahn方程局部无网格数值格式

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106058

Ali Habibirad , Yadollah Ordokhani , Omid Baghani , Hadis Azin

引用次数: 0

Numerical simulation of fracture and breakage behaviors in rock disks containing pre-defects with an improved non-local model 基于改进非局部模型的含预缺陷岩盘断裂破坏行为数值模拟

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-02-01 DOI: 10.1016/j.enganabound.2024.106061

Shijun Zhao , Liang Kong , Qing Zhang , Xinbo Zhao , Wei Xu

{"title":"Numerical simulation of fracture and breakage behaviors in rock disks containing pre-defects with an improved non-local model","authors":"Shijun Zhao , Liang Kong , Qing Zhang , Xinbo Zhao , Wei Xu","doi":"10.1016/j.enganabound.2024.106061","DOIUrl":"10.1016/j.enganabound.2024.106061","url":null,"abstract":"<div><div>The characterization and understanding of cracking propagation behaviors in non-uniform geological structures are crucial for predicting the mechanical response of rock-like materials under varying loading conditions. In this study, an improved Peridynamics (PD) model with degree of heterogeneity characterized by random pre-breaking \"bond\" ratio is introduced to capture the intricacies of crack initiation, and propagation in Brazilian disk (BD) specimens with different pre-cracks was explored. The crack propagation paths and the whole process of breakage of specimens with single pre-crack or pre-crack system were obtained. Next, the splitting mechanism and bearing capacity of the BD specimens with different inclinations of pre-crack were investigated through the improved PD model. Finally, the results of the PD simulations based on non-local actions were compared with the experimental ones in terms of crack propagation and breakage patterns. The simulation results are in good agreement with the experimental results, which can help explain the observed behaviors of cracking propagation and growth behaviors. The simulation results show that the improved PD model can accurately describe the whole process of micro-cracks initiation, aggregation, macro-crack generation, propagation and breakage process. This study provides valuable insights for improving simulations and contributing to the field of geomechanics.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"171 ","pages":"Article 106061"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825136","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 improved interpolating element-free Galerkin method based on nonsingular weight functions for three-dimensional elastoplastic problems

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-01-30 DOI: 10.1016/j.enganabound.2025.106136

Y.F. Wang , Y. Lu , L. Chen , M.J. Peng , Y.M. Cheng

{"title":"The improved interpolating element-free Galerkin method based on nonsingular weight functions for three-dimensional elastoplastic problems","authors":"Y.F. Wang , Y. Lu , L. Chen , M.J. Peng , Y.M. Cheng","doi":"10.1016/j.enganabound.2025.106136","DOIUrl":"10.1016/j.enganabound.2025.106136","url":null,"abstract":"<div><div>Because of the nonlinearity, three-dimensional (3D) elastoplastic problems are very important for any numerical method. In this study, the improved interpolating element-free Galerkin (IIEFG) method based on nonsingular weight functions for elastoplastic problems is presented. An improved interpolating moving least-squares (IIMLS) method with nonsingular weight functions is applied to construct the shape function. The elastoplastic control equations are formulated using the incremental Galerkin weak form with considering the nonlinear stress-strain relationship. Then the equations of IIEFG are presented. A key advantage of IIEFG is its ability to directly apply boundary conditions to improve computational efficiency because of the interpolating property of IIMLS. And using nonsingular weight functions can overcome the disadvantage of singular weight functions, and the computational accuracy is improved. Five numerical examples are presented to evaluate the impact of parameters such as node arrangement, the number of loading steps, and scaling parameters of the influence domain impact the calculation results of this method. Comparisons with other numerical methods demonstrate the superior computational efficiency and accuracy of IIEFG for solving 3D elastoplastic problems.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":"172 ","pages":"Article 106136"},"PeriodicalIF":4.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077702","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 stable numerical investigation based on geometric greedy points for 2D time-fractional partial integro-differential equations with singular kernels

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2025-01-30 DOI: 10.1016/j.enganabound.2025.106129

Mojtaba Fardi, Banafsheh Raeisi, Mohammadreza Ahmadi Darani

引用次数: 0