Abstract: The expressions of lower confidence limit of structural reliability were introduced in the case that structural stress and strength were normally distributed. The lower confidence limit of the structural reliability of a hot gas generator case in the whole process was calculated. The results show that the effect of the case temperature on its structural reliability can not be ignored.

Key words: Gas generator;Stress strength interference theory;Structural reliability;Dynamic analysis method;Reliability assessment

摘要： 对某燃气发生器壳体的可靠性进行了分析 ,应用应力和强度均服从正态分布时结构可靠度的置信下限公式 ,得到了壳体在整个工作期间内的可靠度的置信下限 ,说明壳体温度的变化对其结构可靠度的影响不可忽视

关键词: 燃气发生器;应力强度干涉理论;结构可靠性;动态分析法;可靠性评价