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Arash SEKHAVATIAN, Asskar Janalizadeh CHOOBBASTI
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 66-80 doi: 10.1007/s11709-018-0461-y
关键词: uncertainty reliability analysis deep excavations random set method finite difference method
Peng WEI, Wenwen WANG, Yang YANG, Michael Yu WANG
《机械工程前沿(英文)》 2020年 第15卷 第3期 页码 390-405 doi: 10.1007/s11465-020-0588-0
关键词: level set method topology optimization density-based method level set band
Xi F. XU
《结构与土木工程前沿(英文)》 2015年 第9卷 第2期 页码 107-113 doi: 10.1007/s11709-014-0268-4
关键词: multiscale finite element settlement perturbation random field geotechnical
XFEM schemes for level set based structural optimization
Li LI, Michael Yu WANG, Peng WEI
《机械工程前沿(英文)》 2012年 第7卷 第4期 页码 335-356 doi: 10.1007/s11465-012-0351-2
In this paper, some elegant extended finite element method (XFEM) schemes for level set method structural optimization are proposed. Firstly, two- dimension (2D) and three-dimension (3D) XFEM schemes with partition integral method are developed and numerical examples are employed to evaluate their accuracy, which indicate that an accurate analysis result can be obtained on the structural boundary. Furthermore, the methods for improving the computational accuracy and efficiency of XFEM are studied, which include the XFEM integral scheme without quadrature sub-cells and higher order element XFEM scheme. Numerical examples show that the XFEM scheme without quadrature sub-cells can yield similar accuracy of structural analysis while prominently reducing the time cost and that higher order XFEM elements can improve the computational accuracy of structural analysis in the boundary elements, but the time cost is increasing. Therefore, the balance of time cost between FE system scale and the order of element needs to be discussed. Finally, the reliability and advantages of the proposed XFEM schemes are illustrated with several 2D and 3D mean compliance minimization examples that are widely used in the recent literature of structural topology optimization. All numerical results demonstrate that the proposed XFEM is a promising structural analysis approach for structural optimization with the level set method.
关键词: structural optimization level set method extended finite element method (XFEM) computational accuracy and efficiency
Applying the spectral stochastic finite element method in multiple-random field RC structures
Abbas YAZDANI
《结构与土木工程前沿(英文)》 2022年 第16卷 第4期 页码 434-447 doi: 10.1007/s11709-022-0820-6
关键词: uncertainty spectral stochastic finite element method correlation length reliability assessment reinforced concrete beam/slab
Analytical method of capsizing probability in the time domain for ships in the random beam seas
LIU Liqin, TANG Yougang, LI Hongxia
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 361-366 doi: 10.1007/s11709-007-0048-5
关键词: different survival probability different significant nonlinear differential narrowband
基于随机有限集的多传感器多目标跟踪研究进展 Review Articles
达凯1,李天成2,朱永锋1,范红旗1,付强1
《信息与电子工程前沿(英文)》 2021年 第22卷 第1期 页码 1-140 doi: 10.1631/FITEE.2000266
Level set-based isogeometric topology optimization for maximizing fundamental eigenfrequency
Manman XU, Shuting WANG, Xianda XIE
《机械工程前沿(英文)》 2019年 第14卷 第2期 页码 222-234 doi: 10.1007/s11465-019-0534-1
关键词: topology optimization level set method isogeometric analysis eigenfrequency
Yingjun WANG,David J. BENSON
《机械工程前沿(英文)》 2016年 第11卷 第4期 页码 328-343 doi: 10.1007/s11465-016-0403-0
In this paper, an approach based on the fast point-in-polygon (PIP) algorithm and trimmed elements is proposed for isogeometric topology optimization (TO) with arbitrary geometric constraints. The isogeometric parameterized level-set-based TO method, which directly uses the non-uniform rational basis splines (NURBS) for both level set function (LSF) parameterization and objective function calculation, provides higher accuracy and efficiency than previous methods. The integration of trimmed elements is completed by the efficient quadrature rule that can design the quadrature points and weights for arbitrary geometric shape. Numerical examples demonstrate the efficiency and flexibility of the method.
关键词: isogeometric analysis topology optimization level set method arbitrary geometric constraint trimmed element
Rajarshi PRAMANIK, Dilip Kumar BAIDYA, Nirjhar DHANG
《结构与土木工程前沿(英文)》 2021年 第15卷 第2期 页码 478-489 doi: 10.1007/s11709-021-0698-8
关键词: finite element method square footing reliability analysis fuzzy set theory coefficient of variation spatial variability
A regularization scheme for explicit level-set XFEM topology optimization
Markus J. GEISS, Jorge L. BARRERA, Narasimha BODDETI, Kurt MAUTE
《机械工程前沿(英文)》 2019年 第14卷 第2期 页码 153-170 doi: 10.1007/s11465-019-0533-2
关键词: level-set regularization explicit level-sets XFEM CutFEM topology optimization heat method signed distance field nonlinear structural mechanics fluid mechanics
包极峰,刘扬,贺仲雄
《中国工程科学》 2005年 第7卷 第5期 页码 84-89
Long JIANG, Yang GUO, Shikui CHEN, Peng WEI, Na LEI, Xianfeng David GU
《机械工程前沿(英文)》 2019年 第14卷 第2期 页码 171-189 doi: 10.1007/s11465-019-0530-5
关键词: concurrent topology optimization parametric level set method cardinal basis function shell-infill structure design conformal mapping
黄显明,易继锴
《中国工程科学》 2004年 第6卷 第4期 页码 44-50
提出了在模糊神经网络中使用Rough集理论进行网络结构设计的方法。由于Rough集理论有强大的数值分析能力,而模糊神经网络具有准确的逼近收敛能力和较高的精度,所以通过两者的结合,可以得到一种可理解性好、计算简单、收敛速度快的神经网络模型。这种网络构造方法的主要过程为:首先,利用Rough集理论对给定数据集进行规则获取;然后,根据这些规则构造模糊神经网络各层的神经元个数及相关参数初始值;最后,用BP算法迭代求出网络的各种参数,完成网络的设计。给出了一个二维非线性函数拟合的实例,进一步验证了方法的正确性。
苗成林,冯俊文
《中国工程科学》 2011年 第13卷 第9期 页码 109-112
随着时间、环境的不断变化及企业技术创新能力的进一步要求,现有的技术创新能力已逐渐不能满足企业技术创新的要求,因此技术创新能力更新成为企业在新的要求下的一种能力行为。文章基于粗集理论研究了新要求下的企业技术创新能力更新方法,确定技术创新能力更新次序以达到更新费用最低,随后分析算法并通过实例证明其有效性。
标题 作者 时间 类型 操作
Application of random set method in a deep excavation: based on a case study in Tehran cemented alluvium
Arash SEKHAVATIAN, Asskar Janalizadeh CHOOBBASTI
期刊论文
Level set band method: A combination of density-based and level set methods for the topology optimization
Peng WEI, Wenwen WANG, Yang YANG, Michael Yu WANG
期刊论文
Multiscale stochastic finite element method on random field modeling of geotechnical problems – a fast
Xi F. XU
期刊论文
Applying the spectral stochastic finite element method in multiple-random field RC structures
Abbas YAZDANI
期刊论文
Analytical method of capsizing probability in the time domain for ships in the random beam seas
LIU Liqin, TANG Yougang, LI Hongxia
期刊论文
Level set-based isogeometric topology optimization for maximizing fundamental eigenfrequency
Manman XU, Shuting WANG, Xianda XIE
期刊论文
Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed
Yingjun WANG,David J. BENSON
期刊论文
Reliability assessment of three-dimensional bearing capacity of shallow foundation using fuzzy set theory
Rajarshi PRAMANIK, Dilip Kumar BAIDYA, Nirjhar DHANG
期刊论文
A regularization scheme for explicit level-set XFEM topology optimization
Markus J. GEISS, Jorge L. BARRERA, Narasimha BODDETI, Kurt MAUTE
期刊论文
Concurrent optimization of structural topology and infill properties with a CBF-based level set method
Long JIANG, Yang GUO, Shikui CHEN, Peng WEI, Na LEI, Xianfeng David GU
期刊论文