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Seismic performance of underground subway station structure near the strike-slip fault by the developed hybrid IBE-FEM method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-27 Ying Liu, Haiyang Zhuang, Ji Zhang, Zhongxian Liu
To investigate the influence of strike-slip faults on the seismic responses of underground structures, based on the single-layer potential theory of the boundary element concept and the fault-site-underground structure coupling mechanisms, we proposed a hybrid indirect boundary element-finite element numerical method (IBE-FEM) to simulate efficiently the seismic response of the entire process from
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Frictional contact analysis between two-dimensional deformable anisotropic magneto-electro-elastic bodies via a semi-analytical method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-26 Van Thuong Nguyen, Nguyen Dinh Duc
In this paper, we utilize the surface Green's function of a magneto-electro-elastic (MEE) half-plane as a general analytical kernel to develop a semi-analytical method (SAM). This SAM is designed to solve the two-dimensional contact problems of two dissimilar deformable anisotropic MEE bodies. Using the surface Green's function, the associated influence matrices in SAM can be obtained in a closed mathematical
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An isogeometric analysis of solar panels with a bio-inspired substrate Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-26 Nam V. Nguyen, Kim Q. Tran, Dieu T.T. Do, Chien H. Thai, Krzysztof Kamil Żur, H. Nguyen-Xuan
We in this paper propose a high-performance design using bio-inspired metamaterials for multilayered perovskite solar cell (MPSC) plates. The static bending and free vibrational responses of the newly designed MPSC panels with the presence of the triply periodic minimal surface (TPMS) substrate are subsequently investigated numerically. The displacements of the present plate model are then approximated
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Analytic solution of the free boundary problem for porous media flow using a conformal map validated by the boundary element method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-24 Faisal Muteb K. Almalki, Michael H. Meylan
This paper presents an analytic approach to solving the classical problem of free boundary porous media flow. The solution is found by constructing an operator, derived from a conformal map, which is then reduced to a matrix and inverted. This matrix is then used to solve a system of linear equations with all terms in the matrix calculated exactly. To confirm the solution, we made a comparison with
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A nonconforming surface mesh generation method by binary tree Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-22 Jianming Zhang, Chong Zhang, Rongxiong Xiao, Baotao Chi
Computer-aided engineering (CAE) has emerged as an indispensable tool for facilitating engineering practices and driving industrial innovation. However, the insufficient quality and efficiency of discretizing complex computer-aided design (CAD) models significantly impede the advancement of CAE calculation accuracy and automation. The presence of “dirty” geometry leads to the fact that it is almost
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A 2D equivalent linear inversion model of bedrock motions in a layered transversely isotropic half-space Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-21 Ping Zhang, Jianwen Liang, Zhenning Ba
Inversion is the process that evaluates input motion on the bedrock from surface motions, primarily for use as input excitation for site seismic response or soil-structure interaction analyses. The paper presents a two-dimensional (2D) equivalent linear inversion model for bedrock motion in a multi-layered transversely isotropic (TI) half-space. Based on the exact dynamic stiffness matrices of TI soil
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In Memoriam: Professor Subrata Mukherjee (1945-2022) Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-20 Wenjing Ye, Yijun Liu
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Peridynamic contact models for fracture analysis based on the micro-beam bond Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-20 Guozhe Shen, Tianze Wang, Guojun Zheng, Yang Xia
Contact problems are ubiquitous in engineering systems. Establishing contact models to predict the crack propagation and fracture is significant. Therefore, the present study proposes two peridynamic contact models for two-dimensional (2D) and three-dimensional (3D) contact problems based on the micro-beam bond and the Hertz theory, using the relative position of particles and the contact micromoduli
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A proportional topology optimization method with level-set description and evolutionary strategy Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-19 Xiong Rao, Wenming Cheng, Run Du
In this work, we propose a proportional topology optimization method with a level-set description and evolutionary strategy (PTO-LSES). A level-set function (LSF) evolution scheme based on the nodal compliance proportion is presented and utilized in the new method. Furthermore, a compliance proportion filtering technique, a regularization scheme, and a material interpolation model with penalty are
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An introduction to 5aCAE software based on DiBFM: CAD/CAE integration, dual interpolation, exact geometry and non-conforming mesh Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-19 Rongxiong Xiao, Chong Zhang, Fengling Zhou, Baotao Chi, Jianming Zhang
CAE/CAD integration has always been the focus of competition among CAE software vendors. For decades, however, despite the large human resource and financial investment from some super international companies, CAE/CAD integration has not yet been fully realized. As we know, the boundary integral equation method has advantages of naturally seamless connection with CAD packages. Unfortunately, the conventional
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A novel semi-implicit WLS scheme for time-memory nonlinear behavior in 2D variable-order TF-NLSEs Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-15 Jin-Lian Ren, Yue-Chao Wang, Tao Jiang, Rong-Rong Jiang, Deng-Shan Wang
In this paper, a novel hybrid semi-implicit meshless weighted least-squares (WLS) scheme H-SIFPM is developed for the first time by coupling the semi-implicit finite point-set method and finite difference method (FDM), and then applied to predict the time-memory nonlinear behavior dominated by a 2D variable-order time-fractional nonlinear Schrödinger equation (TF-NLSE). The proposed H-SIFPM for TF-NLSE
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Buckling responses of the polyhedral composite lining fitted in the cracked subsea pipeline under combined loading fields Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-14 Qian Zhang, Rui Bu, Meiling Shen, Zhaochao Li
The present work develops a bio-inspired polyhedral composite lining to rehabilitate the cracked subsea pipeline. This functionally graded porous (FGP) polyhedral lining is subjected simultaneously to the thermal field and the mechanical loading field. The graphene platelets (GPL) are added to the FGP polyhedral lining to raise the bending stiffness of the pipeline-lining system. Both the Halpin-Tsai
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The meshless backward substitution method for inverse Cauchy problems in electroelastic piezoelectric structures Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-14 Lianpeng Shi, Ji Lin, Sergiy Reutskiy
The backward substitution method is a recently proposed semi-analytical meshless collocation method. The main idea of the back substitution method is to obtain the boundary approximation from the boundary data, and this approximation does not need to satisfy the governing equation. Then, the traditional linear combination of basis functions is used to construct a correcting approximation that satisfies
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Contrast reconstruction of overfilled cavities by incorporating multi-frequency scattering fields and attention mechanism into two-step learning method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-14 Meiling Zhao, Jiayi Liu, Hui Zheng, Liqun Wang
We reconstruct the contrast of overfilled cavities by presenting an improved two-step learning method, which incorporates multi-frequency scattering fields and attention mechanism. The dataset of scattering fields is built with different frequencies by using Petrov–Galerkin finite element interface method based on non-body-fitted meshes. Since the shapes of various cavities and the interfaces of inhomogeneous
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Numerical simulation of the damage and ignition responses of high explosives under low-velocity impact using the SPH method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-13 Wenbin Liu, Zhuoping Duan, Yan Liu, Tingting Zhou, Fenglei Huang
The damage evolution and ignition mechanism of high explosives are of great importance in assessing the safety of munitions and guiding the design of munitions. In this study, the smoothed particle hydrodynamics (SPH) method is combined with a viscoelastic–viscoplastic-damage constitutive model and a hot spot model to explore the damage and ignition responses of high explosives under low-velocity impact
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Neural network-based DPIM for uncertainty quantification of imperfect cylindrical stiffened shells with multiple random parameters Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-13 Hanshu Chen, Guohai Chen, Dixiong Yang, Zhuojia Fu
The study of the impact of random parameters on the load-carrying capacity of imperfect cylindrical stiffened shells remains limited, due to the expensive cost of experimental testing. In this study, a post-buckling analysis model to numerically determine the collapsed load is first introduced. However, it is challenging to analyze the probability characteristics of a shell considering multiple random
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Introducing the evaluation condition number: A novel assessment of conditioning in radial basis function methods Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-12 Amir Noorizadegan, Robert Schaback
RBF methods are crucial for reconstructing functions from data sites, like solving partial differential equations. However, ill-conditioning is common, and the standard condition number may not fully address it as it focuses solely on the Kernel matrix. The concept of the “largest manageable scale” is introduced, representing the maximum scale where errors are minimized without amplification. To determine
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Protuberance placement mastery: Shock wave control integration with Coanda effect to thrust vectoring on a sonic jet Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-12 Mohammad Reza Soufivand, Mohammad Hojaji, Mohammad Hossein Razavi Dehkordi
Thrust Vector Control (TVC) is a technique that allows precise control over the direction and velocity of an aerial vehicle. This paper presents a novel approach combining shock wave control and the Coanda effect to apply this technique in sonic flows. The objective is to achieve more eligible and operational control over the deviation angles of the thrust vector. The research is conducted through
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Meshfree methods for the time fractional Navier–Stokes equations Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-10 Yan Liu, Jiye Yang, Zhiyong Liu, Qiuyan Xu
The Navier–Stokes equations are the fundamental equations governing fluid motions. Due to the excellent properties of memory and heredity of the time fractional derivative involved in the equations, the time fractional Navier–Stokes equations (TFNSE) have been applied to describe various phenomena including turbulence, non-uniform flows and viscoelasticity. In this paper, we develop a new method combining
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Numerical predictions of motions and coupled bending and torsional vibrations of containerships in regular head and oblique waves Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-10 Haixing Wang, Wenyang Duan, Jikang Chen, Chao Tian
In this paper, global hydroelastic responses of two ultra large containerships in head and oblique waves are numerically predicted by means of a combined method which is mainly focused on the high-frequency vibrations under harsh sea conditions. The Damping Zone Method is used for the achievement of infinity radiation condition and the steady and unsteady flow are solved by Taylor Expansion Boundary
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Random acoustic radiation prediction and source localization for shell structures in shallow sea based on ConvNeXt network Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-08 Jingjuan Zhai, Ning Fu, Linyuan Shang
Assisted by computational mechanics methods and deep learning, this paper proposes a data-driven method for predicting random acoustic radiation and localizing underwater source in a shallow sea. A combined method of the pseudo excitation method (PEM), the finite element method (FEM), the virtual mass method (VM), and the image method-based boundary element method (I-BEM) is developed to predict the
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Smooth average properties of vibroacoustic radiation of a shaft-hull system in shallow sea Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-08 Jia-xi Duan, Lin Zhang, Xue-hai Sun, Li-jun Yin, Liang-long Da
In shallow water acoustical environment, the propagation of radiated noise of complex structure is determined by the frequency responding properties, spatial directivity, seabed acoustic absorption and the stratification of the sound speed of water. Therefore, it is difficult to assess the propagated noise of complex structure in ocean acoustic environment. In this study, a shaft-hull system (SHS)
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Shear band static evolution based on complementarity method and the improved numerical manifold method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-08 Zibo Fan, Hong Zheng, Xinyu Huang, Tao Wan, Shuaixing Zhao
The simulation of shear band evolution path is of vital importance in prevention of geotechnical disaster. During shear band evolution, the strain localization condition at all the shear band tips as well as the force equilibrium should be obeyed, which is proposed to be treated as the nonlinear complementarity problem (NCP). Since the partial derivative of this NCP is hard to solve, instead of the
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A study on partial pivot ACA boundary element method for elasticity problems Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-08 Xiangjuan Yang, Yongqiang Chen
The boundary element method (BEM) employing the partial pivot adaptive cross approximation (PACA) algorithm has been observed to experience convergence failures and reduced solution accuracy when solving elasticity problems, especially at large scales. To address this issue, this paper proposes an improved algorithm for both 2D and 3D elasticity problems.
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A new approach to multi-domain fast multipole boundary element method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-08 Jiayue Hou, Yongqiang Chen
The fast multipole boundary element method (FMBEM) is a powerful technique for solving large-scale problems. Its effectiveness heavily relies on the iterative solver, which in turn depends crucially on the performance of the preconditioner. Although a leaf-based preconditioner has proven effective in the single domain FMBEM (SFB), it encounters challenges in the multi-domain FMBEM (MFB).
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Cooling of a hot elastic plate by using hybrid channel-jet impingement system with ternary nanofluid and efficient computations by using ANN assisted CFD Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-07 Fatih Selimefendigil, Hakan F. Oztop
In the present study, cooling of a hot elastic plate by using combined channel and jet impingement cooling is explored numerically by using finite element method. The operational parameters of the channel cooling system, such as flow rate, have an impact on the lower portion cooling because the distance between the elastic surface and the nozzle varies as a result of the object’s deformation. The coupled
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Topology optimization of auxetic microstructures with isotropic and orthotropic multiple materials based on element-free Galerkin method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-05 Jianping Zhang, Zhiqiang Zhang, Haiming Zhang, Shixiong Wu, Shuying Wu, Zhijian Zuo, Shuguang Gong
The topology optimization (TO) framework for isotropic and orthotropic multi-material periodic microstructures with auxetic performance is proposed based on element-free Galerkin method (EFGM). Negative Poisson's ratio is chosen as the objective function while satisfying specified volume constraints, and the effective elastic properties of the multi-material microstructures are computed by the energy-based
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An ordinary state-based peridynamics modeling method for simulating anchor bolt pullout in concrete Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-05 Jiaqi Qi, Cheng Li, Ying Tie, Yanping Zheng, Yuechen Duan
In this study, an ordinary state-based peridynamics (OSBPD) modeling method is proposed to simulate the 3D problem of anchor bolt pullout in concrete. The peridynamic methodology is employed as an analytical instrument to circumvent the challenges encountered within the finite element method. A bilinear cohesive constitutive model is employed to describe the plastic behavior of plain concrete. This
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A simplified dual reciprocity boundary element method applied to plate buckling problems Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-05 Alberto Nunes Rangel, Leandro Palermo Junior, Luiz Carlos Wrobel
The effect of in-plane loads on plate behavior can be studied by buckling analyses. The domain integral containing the effect of the in-plane loads is the essential feature in the boundary element method (BEM) formulations. The dual reciprocity method (DRM) is a technique used in the literature to convert domain integrals to equivalent boundary integrals in the BEM. In this study, the DRM is modified
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Topology optimization of multi-dimensional force sensor elastomers based on kinematic properties of parallel mechanism Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-04 Dachang Zhu, Yonglong He, Fangyi Li
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Mathematically improved convergence analysis for the non-overlapping domain decomposition method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-04 Takemi Shigeta
The Dirichlet–Neumann alternating method (D-N method) is considered for solving the Poisson equation in a two dimensional unbounded domain. The method is a non-overlapping domain decomposition method for alternately solving two boundary value problems in two decomposed subdomains by introducing an artificial boundary. The iterative solution obtained by the method converges to the exact one for a suitably
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A gradient-enhanced physics-informed neural networks method for the wave equation Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-03 Guizhong Xie, Beibei Fu, Hao Li, Wenliao Du, Yudong Zhong, Liangwen Wang, Hongrui Geng, Ji Zhang, Liang Si
Physics-informed neural networks (PINNs) have been proven to be a useful tool for solving general partial differential equations (PDEs), which is meshless and dimensionally free compared with traditional numerical solvers. Based on PINNs, gradient-enhanced physics-informed neural networks (gPINNs) add the partial derivative loss term of the independent variable and the physical constraint term, which
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Nonlinear dynamics of nanocomposite beam-like aerospace structures Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-03 Krzysztof Kamil Żur, Hassan Mohammadi, Yaser Kiani, Mirosław Kondratiuk
The design of modern carbon-based beam-like aircraft and spacecraft panels is complex and cost-consuming from an experimental point of view. Effective computational approaches to vibration problems of these structures are expected and desired to create numerical tools for their optimization and analysis, especially in the nonlinear regime of problems.
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Model of moving solid-liquid phase change interface of a droplet following impact on a cold plate Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-03 Zhang Enwei, Liu Hantao, Li Haiqiao
In this study, a model of a moving solid-liquid phase change interface on the surface of an aircraft wing was constructed by combining a continuous surface tension model and a coupled dynamic boundary via the smoothed particle hydrodynamics (SPH) method. The solid-liquid phase change model was constructed using the enthalpy method as the phase change criterion. A dimensionless parameter was defined
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Characterizing thermo-hydro-mechanical behavior of rock using a grain interface-based discrete element model (GIB-DEM) Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-02 Mengyi Li, Louis Ngai Yuen Wong, Zhijun Wu, Fengshou Zhang, Zhiyang Wang
Understanding the meso-structure evolution and macro-mechanical property changes in rocks under thermo-hydro-mechanical (THM) treatment is crucial for advancing and managing deep geological projects. However, due to complex discontinuity networks in rocks, achieving an accurate characterization that quantitatively correlates the micro-macro mechanical behaviors under THM conditions remains challenging
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Study on acoustic propagation problems based on the two-dimensional moving virtual node technique of the CSRPIM Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-06-01 Qihang Xiao, Guiyong Zhang, Huakun Huang, Yang Zhang
The Finite Element Method (FEM) is a strong tool for acoustic propagation problems, but dispersion errors in linear triangular elements, stemming from their inherent “over-stiff” nature, can pose significant trouble. This issue can be effectively solved by the moving virtual node technique. In this paper, the two-dimensional (2D) form of the moving virtual node technique is derived and introduced into
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IBEM simulation of vibration propagation induced by rigid embedded foundations in layered half-space Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-31 Zhenning Ba, Zhanyuan Fu, Mingjie Liu, Yan Wang
Research on the vibration propagation mechanism and influencing factors of the foundation vibration is gaining attention increasingly. This study utilizes the IBEM (Indirect Boundary Element Method) to derive a semi-analytical solution for investigating the vibration propagation laws induced by a rigid embedded foundation in a layered half-space. Initially, the vibration response is simulated by combining
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An n-sided polygonal cell-node-based smoothed finite element method for solving two-dimensional heat conduction problems Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-31 Cheng-Tao Wu, Rui-Ping Niu, Cai-Xia Shi, Shao-Wei Wu
An -sided polygonal cell-node-based smoothed finite element method is proposed to analyze two-dimensional heat conduction problems. Through the gradient smoothing technique, the internal integral of the polygonal element is transformed into the boundary integral based on the smoothing domain, thus reducing the continuity requirement of the trial function, and only requiring the shape function value
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Vibro-acoustic response analysis of stiffened sandwich PFGM doubly-curved shells with full Poisson's ratio cellular cores Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-31 E Rao, Tao Fu
This paper presents an analytical investigation of the acoustic radiation characteristics of the new sandwich porous functionally graded material (PFGM) doubly-curved shells with full Poisson's ratio feature range using first order shear deformation theory (FSDT) and Hamiltonian principle, combined with Rayleigh integral method. By modifying the material characteristics of PFGM face sheets along their
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An improved extended integrated radial basis functions meshfree method for dynamic fracture analysis in bending plate structure Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-30 Nha Thanh Nguyen, Vay Siu Lo, Dinh Kien Nguyen, Thien Tich Truong
An improvement for the extended integrated radial basis functions (XiRBF) meshfree method is proposed in this study for dynamic crack analysis in bending plate structure. The deformation behavior of plate structure is described by the first-order shear deformation theory (FSDT). The iRBF approach offers a benefit by commencing the approximation procedure with the primary function’s highest-order derivative
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On the size-dependent electromechanical layered beam-type porous functionally graded flexoelectric energy harvesters Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-29 Sara Fattahian Dehkordi, Yaghoub Tadi Beni
Flexoelectric energy harvesters are more efficient at micro-scale than piezoelectric energy harvesters because of the significant size-dependent feature of flexoelectricity. The purpose of this study is to investigate the energy harvesting behavior of micro-beams that can be the basis for the design and measuring of functionally graded flexoelectric energy harvesters. To this end, the controlled vibration
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Meshless boundary integral quadrature method for calculating the conduction shape factor of exchanger tubes containing slits Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-29 Jia-Wei Lee, Hung-Wen Yang, Jeng-Tzong Chen
In this paper, the meshless boundary integral quadrature method (MBIQM) is proposed to determine the conduction shape factor of heat exchanger tubes containing slits. The MBIQM is a meshless method of quadrature form by introducing the adaptive exact solution and Gaussian quadrature. In this way, the singular integral can be technically calculated free of the sense of Cauchy principal value in numerical
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An explicit-implicit hybrid SBFEM with quadtree mesh for fluid-solid interaction Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-27 Pengcheng Liu, Mi Zhao, Junqi Zhang, Guoliang Zhang, Zhidong Gao, Xiuli Du
Fluid-solid interaction (FSI) poses a significant challenge in engineering applications. Due to the presence of off-diagonal coupling terms in the matrices, it is difficult to use explicit time integration method directly. Consequently, the whole system often needs to be solved using implicit method, albeit at the expense of considerably increased computational cost. In this paper, an innovative approach
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Direct RBF-PU method combined with the tangent plane approach for parabolic equation on surface Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-24 Yajun Liu, Yuanyang Qiao, Xufeng Xiao, Xinlong Feng
In this paper, we design a new framework of direct radial basis function partition of unity (D-RBF-PU) method to solve parabolic equation on surface with and without boundary. Resort to the tangent plane approach, the proposed method avoids dealing with complex surface differentiation operators, and only needs to approximate the standard differentiation operators on the two-dimensional tangent space
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Nonstationary random vibration analysis of cracked plates by SFBEM-FEM coupling method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-24 Cheng Su, Kemin Cai
Dynamic reliability analysis of crack problems is of great concern to engineering practice. To tackle this problem, dynamic stress intensity factors (SIFs) of cracks need to be computed at high accuracy and efficiency with wide adaptability. In this study, a cracked superelement is first proposed to model the near-crack region. The stiffness matrix and mass matrix of the cracked superelement are formulated
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Unisolvence of random Kansa collocation by Thin-Plate Splines for the Poisson equation Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-23 F. Dell’Accio, A. Sommariva, M. Vianello
Existence of sufficient conditions for unisolvence of Kansa unsymmetric collocation for PDEs is still an open problem. In this paper we make a first step in this direction, proving that unsymmetric collocation matrices with Thin-Plate Splines for the 2D Poisson equation are almost surely nonsingular, when the discretization points are chosen randomly on domains whose boundary has an analytic parametrization
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Vibrations of skew cylindrical shells made of FG-GPLRCs under rapid surface heating Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-22 R. Jahanbazi, Y. Kiani
An analysis is performed in this research to examine the thermally induced vibrations in skew cylindrical shells. It is assumed that shell is made from a composite laminated material where each layer is reinforced with graphene platelets (GPLs). The amount of GPLs in the layers may be different which results in a piecewise functionally graded media. The one-dimensional transient heat conduction equation
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Modified tuna swarm optimization algorithm for brain stroke imaging with electrical impedance tomography Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-21 Yajun Lou, Yanyan Shi, Ke Yang, Lu Zhou, Tianyi Yang, Peng Zhang, Bing Qin, Zhiyu Qian
Stroke is a common disease characterized by high disability rate and high mortality rate. Accurate detection and continuous monitoring are vital for the treatment of stroke. As a promising medical imaging technique, electrical impedance tomography (EIT) is able to provide an alternative for brain imaging. With this technique, conductivity distribution variation caused by pathological change can be
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Fundamental solutions and Cayley-Hamilton formula Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-21 M.A. Kamal, Youssef F. Rashed, J.T. Katsikadelis, C.S. Chen
In this paper, a new technique to obtain a fundamental solution is developed. The well-known Cayley-Hamilton theorem in linear algebra is adopted to obtain the inverse of the differential operator (in its symbolic form) of the governing equation and hence the corresponding fundamental and particular solutions are obtained. Several examples are presented to demonstrate the use of the presented technique
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Investigation on rock breaking and optimum spacing of TBM cutters under confining stress using a continuum-discontinuum method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-21 Tie Wang, Chengzeng Yan, Hong Zheng
stress is one of the important geological factors affecting Tunnel Boring Machine (TBM) performance. Meanwhile, cutter wear is also a nonnegligible issue in TBM tunneling. In this work, a continuum-discontinuum approach, the finite-discrete element method (FDEM) is employed to explore the impact of confining stress on rock breaking and optimum cutter spacing. Firstly, the evolution of system kinetic
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Lattice Boltzmann method for variable viscous fluid flow on spherical surface Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-20 Junxiang Yang, Seungyoon Kang, Youngjin Hwang, Soobin Kwak, Seokjun Ham, Junseok Kim
We propose an efficient numerical method for an incompressible fluid flow with variable viscosity on spherical surface. The proposed computational scheme is based on a finite volume lattice Boltzmann method (FVLBM). The spherical surface is triangulated and each point on the triangular mesh is assigned to one of two values of variable viscosity. Simplified coastlines using interpolation makes our proposed
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Uncertainty quantification and robust shape optimization of acoustic structures based on IGA BEM and polynomial chaos expansion Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-20 Xuhang Lin, Wenzhi Zheng, Fang Zhang, Haibo Chen
Frameworks for uncertainty quantification in the acoustic field and robust shape optimization for sound barriers based on the isogeometric boundary element method (IGA BEM) and polynomial chaos expansion (PCE) method are proposed in this work. The continuous adjoint variable method (AVM) is adopted and formulated under the circumstance of IGA BEM to accelerate the sensitivity computation in shape optimization
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Random field of homogeneous and multi-material structures by the smoothed finite element method and Karhunen–Loève expansion Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-18 Lixiong Cao, Jiaxing Han, Shaowei Wu, Guirong Liu
A random field of homogeneous and multi-material structures with uncertain scenarios is addressed by constructed the generalized stochastic cell-based smoothed finite element model. Smoothed finite element method (S-FEM) is “Jacobian-free”, which is not only overcomes the limitations of “overly-stiff” and low accuracy of the standard FEM, but also demonstrates strong resistance to mesh distortion.
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An Eulerian meshless method for two-phase flows with embedded geometries Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-18 Anand S. Bharadwaj, Pratik Suchde, Prapanch Nair
We present a novel Eulerian meshless method for two-phase flows with arbitrary embedded geometries. The spatial derivatives are computed using the meshless generalized finite difference method (GFDM). The sharp phase interface is tracked using a volume fraction function. The volume fraction is advected using a method based on the minimization of a directional flux-based error. For stability, the advection
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A new application of fractional derivatives for predicting human glioblastoma multiforme tumor growth Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-17 M. Hosseininia, O. Bavi, M.H. Heydari, D. Baleanu
Glioblastoma is the most common and deadly primary brain tumor in adults. To optimize the treatment strategies, it is essential to understand the tumor growth dynamics in different periods. In this study, we use image processing techniques to combine the available early-stage imaging data and applied a fractional reaction–diffusion equation to predict the human glioblastoma multiforme tumor growth
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Nonlinear vibration analysis of pre/post-buckled 3D-printed tubular metastructures Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-16 Fatemeh Ghasemi, Erfan Salari, Abbas Rastgoo, Deli Li, Jian Deng
Medical devices utilize auxetic tubes with a negative Poisson’s ratio in esophageal and vascular stents to guard against embolism. Designing stents with auxetic structures provides several advantages compared to traditional stents. Therefore, the current investigation focuses on analyzing the small/large amplitude vibration of the pre/post-buckled geometrically imperfect re-entrant auxetic tube. In
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Numerical simulation of sloshing flows with elastic structure by coupling δ+-SPH and SPIM Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-15 Guiyong Zhang, Xi Yang, Guangqi Liang, Kexiong Zheng, Zhifan Zhang
In this paper, an FSI solver is developed by coupling δ-SPH and SPIM to deal with sloshing flows involving large nonlinear deformations in both fluid and solid fields. The coupled scheme is achieved by exchanging information between the fluid and structure with the aid of FSI interface and ghost particles in the solid domain. The calculation of normal vector for the FSI force is corrected to ensure
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Investigation of tunnel excavation numerical analysis method for the combined finite-discrete element method Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-15 Peitao Li, Quansheng Liu
Tunnel excavation was a typical three-dimensional space problem. As a two-dimensional numerical method, the combined finite-discrete element method did not demonstrate the spatial effect during the tunnel excavation simulation. A new excavation path for the combined finite-discrete element method was proposed based on the spatial evolution characteristics. Then, the tunnel excavation simulation was
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Numerical study of the effects of in-situ stress on high-energy gas fractures propagation in laminated rock masses based on peridynamics Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-14 Haoyang Li, Tianhe Kang, Xiaoyu Zhang, Runxu Zhang, Xiaomin Liang, Wenqing Zhu, Bin Zhang
The aim of this study is to investigate the propagation pattern of high-energy gas fractures in laminated rock masses by considering different in-situ stress characteristics. To this end, a numerical model was constructed in the framework of the peridynamic theory that considers the combined effect of dynamic and quasi-static loading of high-energy gas to fracture the laminated rock mass, and the validity
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Regularization effect of peridynamic horizon on strain localization and soil slope instability analysis Eng. Anal. Bound. Elem. (IF 4.2) Pub Date : 2024-05-14 Hanwei Zhou, Feng Shen, Xin Gu, Bingyi Li
Soil slope stability is significant to the safety of various geotechnical engineering structures, and the instability simulation of soil slope inevitably involves the shear band evolution. To avoid the mesh-dependence dilemma of traditional numerical methods in simulating shear band evolution, the present study develops a non-ordinary state-based peridynamics (NOSB PD) corresponding to the elastoplastic