Abstract: For general reliability analysis with fuzzy failure and safety state, line sampling method is presented to calculate general failure probability. Integral region of the general failure probability is scattered according to the value of performance function. In the scattered integral region, the membership func-tion values of the performance function to the fuzzy failure region keep constant approximately, then line sampling method is employed to obtain the general failure probability. The con-cept and the implementation are described step by step, nu-merical and engineering examples illustrate the rationality and feasibility of the presented method.

Key words: Fuzzy failure, General failure probability, Line sampling, Membership function