卢 昊, 张义民, 黄贤振, 朱丽莎. 多失效模式典型结构系统可靠性稳健设计方法研究[J]. 工程力学, 2011, 28(8): 226-231.
引用本文: 卢 昊, 张义民, 黄贤振, 朱丽莎. 多失效模式典型结构系统可靠性稳健设计方法研究[J]. 工程力学, 2011, 28(8): 226-231.
LU Hao, ZHANG Yi-min, HUANG Xian-zhen, ZHU Li-sha. PRACTICAL METHOD FOR RELIABILITY-BASED ROBUST DESIGN OF TYPICAL STRUCTURAL SYSTEM WITH MULTIPLE FAILURE MODES[J]. Engineering Mechanics, 2011, 28(8): 226-231.
Citation: LU Hao, ZHANG Yi-min, HUANG Xian-zhen, ZHU Li-sha. PRACTICAL METHOD FOR RELIABILITY-BASED ROBUST DESIGN OF TYPICAL STRUCTURAL SYSTEM WITH MULTIPLE FAILURE MODES[J]. Engineering Mechanics, 2011, 28(8): 226-231.

多失效模式典型结构系统可靠性稳健设计方法研究

PRACTICAL METHOD FOR RELIABILITY-BASED ROBUST DESIGN OF TYPICAL STRUCTURAL SYSTEM WITH MULTIPLE FAILURE MODES

  • 摘要: 应用随机摄动技术与二阶矩方法,结合概率网络估算法(Probability Network Evaluation Technique),讨论了多失效模式下结构系统的可靠性和可靠性灵敏度问题,并进一步对结构系统的可靠性稳健设计进行了分析。获得了不同失效模式间的相关统计特性,应用概率网络估算法确定了系统的代表失效模式,得出了结构系统可靠度和可靠性灵敏度;在可靠性优化设计模型中引入可靠性灵敏度,将结构系统可靠性稳健设计转化为满足系统可靠性要求的多目标优化问题;提出了多失效模式下结构系统可靠性分析与可靠性稳健设计的数值方法;通过工程实例验证了该文所述方法的实用性和有效性。

     

    Abstract: Based on the probability perturbation technique, the second moment method and the PNET (Probability Network Evaluation Technique) method, the reliability, reliability sensitivity and reliability-based robust optimization problems of structural system with multiple failure modes are discussed. The correlation coefficients of failure modes are evaluated firstly. By means of the PNET method, the representative failure modes of structural system are defined, and the reliability and reliability sensitivity of the system are obtained. By integrating the reliability sensitivity into the reliability-based optimization design model, the reliability-based robust design of structural system is described as a multi-objective optimization problem. A numerical method for reliability-based robust design of structural system with correlated failure modes is proposed. The method proposed is validated to be practical and effective by the numerical example.

     

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