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在已知模糊参数及其隶属函数的前提下,利用α截尾方法将模糊参数转化为随机区间,根据结构的极限状态函数计算其适应度函数,在随机区间上根据适应度函数利用帝国竞争算法计算结构的可靠性的区间的最大与最小值,帝国竞争算法随着截尾值增加到1,可靠性区间的最大值与最小值收敛到一个值,这个值就是结构最终的可靠性指标.在文中不但介绍了帝国竞争算法,而且还给出了帝国竞争计算结构的模糊可靠性指标的算法步骤.最后用两个算例对本文方法进行了验证说明,算例表明本文方法在计算结构模糊可靠性时优势明显,在工程实践中具有合理性,实用性和易行性.
Based on the known fuzzy parameters and their membership functions, the fuzzy parameters are transformed into random intervals using the method of truncated α, and the fitness function is calculated according to the limit state function of the structure. Based on the fitness function, The maximum and the minimum of the interval for calculating the reliability of the structure are calculated. The Empire competition algorithm converges to the maximum and minimum of the reliability interval as the cut-off value increases to 1, which is the final reliability index of the structure. The article not only introduces the imperial competition algorithm, but also gives the algorithm steps of the fuzzy reliability index of the imperial competitive computing structure.Finally, two examples are used to verify the method in this paper. The examples show that the proposed method is effective in fuzzy computing Obvious advantages when sex, in the engineering practice is reasonable, practical and easy.