考虑结构失效相关时串联工程系统造价与可靠度间的关系

Approximate Expression Relating the Cost and Reliability of an Engineering System

在多级递阶工程系统的优化中,我们选择具有高度综合性质的可靠度、造价和损失期望作为优化参数。本文根据工程大系统优化的需要,在考虑结构失效相关性的条件下,推导出工程系统的造价C与可靠度φ间的关系式,精度计算分析表明,所给关系式的精度是很高的。

In the optimization for hierarchical engineering systems, the highly comprehensive quantities such as reliability, cost and loss expectation are selected as the basic parameters which are going to be optimized. To fulfill the requirements in the global optimization for large scale engineering systems considering the failure-dependence of its contained structures, the approximate dosed form expression relating the cost and reliability of an engineering system is deduced in this paper. Numerical results show that this approximate expression has sufficient accuracy.