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    易平

    • 教授       硕士生导师
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:土木工程学院
    • 学科:结构工程. 防灾减灾工程及防护工程
    • 办公地点:大连理工大学综合实验三号楼524
    • 联系方式:yiping@dlut.edu.cn
    • 电子邮箱:yiping@dlut.edu.cn

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    A two-phase approach based on sequential approximation for reliability-based design optimization

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    论文类型:期刊论文

    第一作者:Zhou, Ming

    通讯作者:Zhou, M (reprint author), Altair Engn Inc, Irvine, CA 92614 USA.

    合写作者:Luo, Zhifan,Yi, Ping,Cheng, Gengdong

    发表时间:2018-02-01

    发表刊物:STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION

    收录刊物:SCIE、EI、Scopus

    卷号:57

    期号:2

    页面范围:489-508

    ISSN号:1615-147X

    关键字:Reliability-based design optimization; Single loop approach; Two-phase approach; Sequential approximation; Minimum performance target point; Computational efficiency

    摘要:The original problem of reliability-based design optimization (RBDO) is mathematically a nested two-level structure that is computationally time consuming for real engineering problems. In order to overcome the computational difficulties, many formulations have been proposed in the literature. These include SORA (sequential optimization and reliability assessment) that decouples the nested problems. SLA (single loop approach) further improves efficiency in that reliability analysis becomes an integrated part of the optimization problem. However, even SLA method can become computationally challenging for real engineering problems involving many reliability constraints. This paper presents an enhanced version of SLA where the first phase is based on approximation at nominal design point. After convergence of first iterative phase is reached the process transitions to a second phase where approximations of reliability constraints are carried out at their respective minimum performance target point (MPTP). The solution is implemented in Altair OptiStruct, where adaptive approximation and constraint screening strategies are utilized in the RBDO process. Examples show that the proposed two-phase approach leads to reduction in finite element analyses while preserving equal solution quality.