结构能度可靠性方法研究

结构系统可靠性研究分随机模型、模糊模型和非概率模型.本文分析了传统随机模型的局限性,利用蒙特卡诺的基本思想.提出了一种新的基于区间分析的模糊可靠性度量体系及分析方法.从物理、几何等方面解释了文中理论的合理性.该方法确定的失效可能度综合了更多的结构有用信息,能够反映结构的实际可靠状态.最后还提出了基于本文可靠性度量方法的结构优化设计模型,通过实例介绍了该方法的具体应用.

Research on structure possibilistic reliability method

The research of structural reliability includes randomness model,fuzzy model,non-probabilistic model.In this paper,the shortcomings of traditional randomness model are discussed.Based on interval arithmetic,a fuzzy reliability measure and analysis methodology for structural reliability computation is presented with the principal of Monte Carlo.The feasibility of the proposed theory is explained in physics and geometry.The failure possibilistic reliability colligates more structural information,and can represent the structural practical reliability.At last,the optimization design model based on fuzzy reliability is discussed.The utility of the presented methodology is demonstrated by examples.