关键词: 结构可靠度, 模糊概率积分法, 应力强度干涉法, 疲劳寿命

Abstract: Great difficulty exists in the process of reliability estimation by traditional stress strength interference method, therefore an approach named as Fussy Probability Integral (FPI) method is investigated. This approach is capable of evaluating structural reliability directly without the demand of strength distributions, which makes the approach itself fast and efficient. Details on this approach and its principle are presented. After that, a sampling method based on FPI is also studied to estimate an approximate value of the structure reliability in case of probably dual integral difficulties in the applications of FPI method. At the end, a real case of application on a turbine engine is presented to validate its applicability and reliability.

Key words: structure reliability, fussy probability integral, stress strength interference, fatigue life