摘要
在结构模糊可靠性分析模型的基础上,充分考虑了状态变量分布密度函数的相关参数的不确定性。这些参数的取值范围可以被确定在相应的区间内,并将这些区间引入到结构模糊可靠性的分析中,基于区间数学理论,提出了一种可以预测结构模糊可靠度所在范围的求解方法,并讨论了当状态变量服从正态分布时,结构的模糊区间可靠性的分析过程。算例表明该方法比传统的模糊可靠性方法能提供更多的关于结构安全程度的有用信息,也更具有工程实用价值。
Based on the fuzzy reliability analysis model, the uncertainty of the related parameters of the distributed density functions of the state variable are taken into account. The span of these parameters can be fixed in the corresponding intervals, then; these intervals are introduced into analyzing the fuzzy reliability of the structures. According to the theory of the interval arithmetic, a method that can forecast the span of the structural fuzzy reliability level is presented. When the stated variable submits normal distribution, the analysis procedure of this method is discussed in detail. Numerical example shows that this method can provide more available information than conventional methods on degree of safety of structure; therefore, it is more valuable for engineering applications.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2009年第4期489-493,共5页
Chinese Journal of Computational Mechanics
基金
国家杰出青年科学基金(10425208)
航空科学基金(2007ZA51003)
高等学校学科创新引智计划(B07009)资助项目
关键词
结构可靠性
模糊可靠性
区间分析
不确定参敷
Structural reliability analysis
fuzzy reliability
interval analysis
uncertain parameters
