摘要
在结构可靠性分析中,由于缺乏足够数据或信息不完整,元件强度和外载的分布参数只能根据已有的实验和专家的经验采用模糊变量进行描述。此时强度和外载是随机模糊变量,基于随机模糊理论,本文提出概率模型的分布参数为模糊变量时的结构可靠性度量指标计算模型。该模型不但可以解决应力和强度服从任意分布时的可靠度问题而且也为计算多变量模型提供了一种计算可靠度的方法。最后通过算例,验证了该方法的有效性和合理性。
In structural reliability analysis, because accurate data is lacking and information is insufficient, the distribution parameters of strength and applied load are described as fuzzy variables by using experts＇ experiences. Now strength and applied load become random fuzzy variables. In this paper a model for structural fuzzy reliability is developed based on random fuzzy theories. This method is suitable for many models. Some examples are used to demonstrate the feasibility and reasonability of the method by using random fuzzy simulation.
出处
《模糊系统与数学》
CSCD
北大核心
2008年第1期163-168,共6页
Fuzzy Systems and Mathematics
基金
国家自然科学基金资助项目(70471057)
陕西省教育厅自然科学基金资助项目(03JK065)
关键词
随机模糊
结构可靠性
可信度
Random Fuzzy
Structural Reliability
Credibility Measure
