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    吴锋

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:力学与航空航天学院
    • 学科:计算力学. 流体力学. 动力学与控制
    • 办公地点:大连理工大学1号综合实验楼506室;
      手机:13940846142;
      常用邮箱:wufeng_chn@163.com
    • 电子邮箱:vonwu@dlut.edu.cn

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    A Modified Computational Scheme for the Stochastic Perturbation Finite Element Method

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    论文类型:期刊论文

    第一作者:Wu, Feng

    通讯作者:Gao, Q (reprint author), Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dept Engn Mech, Fac Vehicle Engn & Mech, Dalian 116023, Peoples R China.

    合写作者:Gao, Qiang,Xu, Xiao-Ming,Zhong, Wan-Xie

    发表时间:2015-01-01

    发表刊物:LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES

    收录刊物:SCIE、Scopus

    卷号:12

    期号:13

    页面范围:2480-2505

    ISSN号:1679-7825

    关键字:Stochastic finite element method; Uncertain structures; Perturbation; Computational scheme

    摘要:A modified computational scheme of the stochastic perturbation finite element method (SPFEM) is developed for structures with low-level uncertainties. The proposed scheme can provide second-order estimates of the mean and variance without differentiating the system matrices with respect to the random variables. When the proposed scheme is used, it involves finite analyses of deterministic systems. In the case of one random variable with a symmetric probability density function, the proposed computational scheme can even provide a result with fifth-order accuracy. Compared with the traditional computational scheme of SPFEM, the proposed scheme is more convenient for numerical implementation. Four numerical examples demonstrate that the proposed scheme can be used in linear or nonlinear structures with correlated or uncorrelated random variables.