摘要
模糊系统的可靠性评估是工程中倍受关注的重要问题。结构系统的可靠性与结构的失效模式有关。模糊结构系统失效的可能度取决于失效可能度最大的最危险失效模式。因此 ,最危险失效模式的识别及对应极限状态方程的建立是模糊结构系统可靠性分析的关键问题。本文基于模糊结构的能度可靠性理论 ,建立模糊结构和机械系统的能度可靠性分析模型。所提出的模糊结构体系失效模式的枚举准则 ,可在只需枚举出少量主失效模式的条件下 ,不漏掉最危险失效模式。
Reliability of structural systems is related to the possible failure modes of the structures. The reliability of fuzzy structural systems may be measured by the possibility of failure of structures, and depended upon the worst failure mode, which has the maximum possibility of failure in all possible failure modes of the structure. Therefore, the identification of the worst failure mode and the establishing of the corresponding performance equation are critical problems of the reliability analysis of fuzzy structural systems. Based on the theory of possibilistic reliability of fuzzy structures that the proposed in a previews paper, a procedure for the analysis of possibilistic reliability of fuzzy mechanical and structural systems was presented systematically. The presented criterion to enumerate the failure modes of fuzzy structural systems may ensure the worst failure mode included in a few enumerated significant failure modes. A numerical example illustrated the effectiveness and feasibility of the proposed procedure.
出处
《机械强度》
CAS
CSCD
北大核心
2003年第4期430-432,共3页
Journal of Mechanical Strength
基金
国家自然科学基金 (595750 4 0
597750 32 )
航空基金 (0 0B530 1 0 )资助项目~~
