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International Journal of Computational Methods最新文献

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An Uncertain Vibration Analysis Method for Nonlinear Systems Under Interval Process Excitations 区间过程激励下非线性系统的不确定振动分析方法
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-02-01 DOI: 10.1142/s0219876222500505
Z. Yao, J. W. Li, C. Jiang, G. Yang
{"title":"An Uncertain Vibration Analysis Method for Nonlinear Systems Under Interval Process Excitations","authors":"Z. Yao, J. W. Li, C. Jiang, G. Yang","doi":"10.1142/s0219876222500505","DOIUrl":"https://doi.org/10.1142/s0219876222500505","url":null,"abstract":"This paper proposes an interval vibration analysis method for nonlinear systems subjected to uncertain excitations, through which its dynamic displacement response bounds can be calculated effectively. In the proposed method, the uncertain excitations are described using the interval process model developed by the authors in recent years. Firstly, the displacement response of a certain degree of freedom for a nonlinear system at an arbitrary time point is expressed as a function of several standard uncorrelated interval variables by using the interval K–L expansion. Secondly, two constrained optimization models are established for the lower and upper bounds of the displacement response of the nonlinear system at the time point. Thirdly, the efficient global optimization (EGO) method is used to solve the above optimization models, and the dynamic displacement response bounds of the nonlinear system can be further obtained. Finally, the effectiveness of the proposed method is verified by investigating two numerical examples.","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45221422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2
A Novel Strategy for Eliminating the Boundary Layer Effect in the Regularized Integral Identity in PIES for 2D Potential Problem 一种消除二维势问题PIES正则积分恒等式中边界层效应的新策略
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-01-14 DOI: 10.1142/s0219876222500530
E. Zieniuk, K. Szerszen, A. Bołtuć
{"title":"A Novel Strategy for Eliminating the Boundary Layer Effect in the Regularized Integral Identity in PIES for 2D Potential Problem","authors":"E. Zieniuk, K. Szerszen, A. Bołtuć","doi":"10.1142/s0219876222500530","DOIUrl":"https://doi.org/10.1142/s0219876222500530","url":null,"abstract":"The paper presents a new strategy for improving the accuracy of solutions near the boundary in the integral identity associated with the parametric integral equation system (PIES) for two-dimensional (2D) potential problems. A significant reduction in accuracy in the zone close to the boundary, also known as the boundary layer effect, is directly associated with the nearly singular properties of kernels present in the integral identity. The paper shows that these singularities can be efficiently eliminated by regularizing the integral identity with the help of the so-called regularizing function with appropriate coefficients. The analyzed examples demonstrate a significant improvement in accuracy, where all integrals of the regularized integral identity are accurately calculated using low-order standard Gauss–Legendre quadrature. The proposed regularization algorithm is independent of the actual boundary shape, its representation and assumed boundary conditions.","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46302712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Optimization design of laminated functionally carbon nanotube reinforced composite plates using deep neural networks and differential evolution 基于深度神经网络和差分演化的功能化碳纳米管增强复合材料层合板优化设计
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-01-12 DOI: 10.1142/s0219876222500657
Zing L. T. Tran, Tam T. Truong, T. Nguyen-Thoi
{"title":"Optimization design of laminated functionally carbon nanotube reinforced composite plates using deep neural networks and differential evolution","authors":"Zing L. T. Tran, Tam T. Truong, T. Nguyen-Thoi","doi":"10.1142/s0219876222500657","DOIUrl":"https://doi.org/10.1142/s0219876222500657","url":null,"abstract":"","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63938289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 numerical method to study the fiber orientation and distribution of fiber reinforced self-compacting concrete 纤维自密实混凝土纤维取向与分布的数值研究方法
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-01-12 DOI: 10.1142/s021987622241002x
Xuemei Liu, Xiangyu Xie, Lihai Zhang, N. Lam
{"title":"A numerical method to study the fiber orientation and distribution of fiber reinforced self-compacting concrete","authors":"Xuemei Liu, Xiangyu Xie, Lihai Zhang, N. Lam","doi":"10.1142/s021987622241002x","DOIUrl":"https://doi.org/10.1142/s021987622241002x","url":null,"abstract":"","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44775745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
NIPG finite element method for convection dominated diffusion problems with discontinuous data 不连续数据对流主导扩散问题的NIPG有限元方法
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-01-12 DOI: 10.1142/s0219876223500019
R. Yadav, Pratima Rai, K. Sharma
{"title":"NIPG finite element method for convection dominated diffusion problems with discontinuous data","authors":"R. Yadav, Pratima Rai, K. Sharma","doi":"10.1142/s0219876223500019","DOIUrl":"https://doi.org/10.1142/s0219876223500019","url":null,"abstract":"","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42417269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Six-Level Time-Split Leap-Frog/Crank-Nicolson Approach For Two-Dimensional Nonlinear Time-Dependent Convection Diffusion Reaction Equation 二维非线性时变对流扩散反应方程的六层时间分裂跳蛙/曲柄-尼科尔森方法
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-01-12 DOI: 10.1142/s0219876222500645
E. Ngondiep
{"title":"A Six-Level Time-Split Leap-Frog/Crank-Nicolson Approach For Two-Dimensional Nonlinear Time-Dependent Convection Diffusion Reaction Equation","authors":"E. Ngondiep","doi":"10.1142/s0219876222500645","DOIUrl":"https://doi.org/10.1142/s0219876222500645","url":null,"abstract":"","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48476143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4
A Multi-Dimensional Lagrange Multiplier Method to Identify the Load Distribution on 3D Special-Shaped Surface in the Strength Analysis of Aircraft Structure 飞机结构强度分析中三维异形表面载荷分布识别的多维拉格朗日乘子法
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2023-01-09 DOI: 10.1142/s0219876222500542
Tong Li, Zebei Mao, Yongming Cai, Bo Wang, Liang Chen
{"title":"A Multi-Dimensional Lagrange Multiplier Method to Identify the Load Distribution on 3D Special-Shaped Surface in the Strength Analysis of Aircraft Structure","authors":"Tong Li, Zebei Mao, Yongming Cai, Bo Wang, Liang Chen","doi":"10.1142/s0219876222500542","DOIUrl":"https://doi.org/10.1142/s0219876222500542","url":null,"abstract":"In the process of aircraft structural design, the aerodynamic load and inertial load need to be distributed from single loading points to distributed finite element (FE) nodes before strength analysis. The most commonly used loading distribution method is a Multi-Point Arrangement (MPA) method, which introduces a one-dimensional Lagrange multiplier based on the principle of minimum deformation energy, and simplifies the special-shaped 3D surface in aircraft structure to a plane. However, the actual aircraft structure contains a large number of special-shaped surfaces, and the MPA method cannot accurately distribute the loads on these complex special-shaped surfaces, affecting the accuracy of strength analysis. This paper developed a new 3D load distribution method based on multi-dimensional Lagrange multipliers (MDLM), which can simultaneously achieve an efficient and accurate distribution of surface aerodynamic loads and inertial loads in all directions. Typical numerical cases showed that when an aircraft structure model is a plane, this MDLM method converges to the traditional MPA method. For 3D special-shaped surfaces, the average error of this MDLM method is 0.77–2.28%, which is significantly smaller than the average error of the traditional MPA method (3.30–7.40%).","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42637306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Different Types of Constitutive Parameters Red Blood Cell Membrane Based on Machine Learning and FEM 基于机器学习和有限元的不同类型红细胞膜本构参数
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2022-12-28 DOI: 10.1142/s0219876222500578
Xinyu Wei, Jianbing Sang, Chuan Tian, Lifang Sun, Baoyou Liu
{"title":"Different Types of Constitutive Parameters Red Blood Cell Membrane Based on Machine Learning and FEM","authors":"Xinyu Wei, Jianbing Sang, Chuan Tian, Lifang Sun, Baoyou Liu","doi":"10.1142/s0219876222500578","DOIUrl":"https://doi.org/10.1142/s0219876222500578","url":null,"abstract":"Research on mechanical response of single red blood cells (RBCs) to mechanical stimuli and the complex material properties of erythrocyte membranes is significant. This work proposes a novel procedure that combines nonlinear finite element method and two machine learning algorithms including Two-Way Deepnets and XGboost together with experiments to identify the hyper elastic material parameters of erythrocyte membranes. Finite element models were established to simulate the stretching process of erythrocyte optical tweezers with different constitutive material parameters from three constitutive models. And the results from the finite element analysis were carried out to generate the training sets for the neural networks. In order to validate the predictions in great detail, the finite element response curves based on the three groups of predicted constitutive parameters are compared with the experimental data. The comparison results show that the Two-Way Deepnets model has performed better efficiency and accuracy and that Reduced Polynomial can describe more precisely the hyperelastic properties of the erythrocyte membrane in the range of experimentally obtained characteristics of single RBCs. This research provides new insights into the identification of constitutive parameters of biological cell membranes, which is crucial for the future research on mechanical mechanisms of the biological cells.","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43855016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Radial Basis Function Based Differential Quadrature Approach to Study Reaction Diffusion of Ca2+ in T Lymphocyte 基于径向基函数的微分求积法研究Ca2+在T淋巴细胞中的反应扩散
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2022-12-20 DOI: 10.1142/s0219876222500591
Hemant Bhardwaj, N. Adlakha
{"title":"Radial Basis Function Based Differential Quadrature Approach to Study Reaction Diffusion of Ca2+ in T Lymphocyte","authors":"Hemant Bhardwaj, N. Adlakha","doi":"10.1142/s0219876222500591","DOIUrl":"https://doi.org/10.1142/s0219876222500591","url":null,"abstract":"","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48764440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2
Well-balanced unstaggered central schemes based on the continuous approximation of the bottom topography 基于底部地形连续逼近的平衡不交错的中心方案
IF 1.7 4区 工程技术
International Journal of Computational Methods Pub Date : 2022-12-14 DOI: 10.1142/s021987622250058x
Jian Dong
{"title":"Well-balanced unstaggered central schemes based on the continuous approximation of the bottom topography","authors":"Jian Dong","doi":"10.1142/s021987622250058x","DOIUrl":"https://doi.org/10.1142/s021987622250058x","url":null,"abstract":"","PeriodicalId":54968,"journal":{"name":"International Journal of Computational Methods","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41703160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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