航空发动机结构系统的可靠性模型

为使航空发动机可靠性模型误差更小，对航空发动机传统可靠性模型进行误差分析，指出可靠性指标扩张的原因，建立了考虑航空发动机结构系统及其失效力学特征的基于结构系统失效模式的航空发动机可靠性模型，并给出了各层的可靠度计算方法.所建立的基于失效模式的航空发动机结构系统可靠性模型考虑了失效模式的相对独立性、时效性和失效率的时变性，可以避免重要失效模式的遗漏、可靠性指标的过度扩张等问题，具有较强的工程适用价值. 

Reliability model of aero-engine structural system

In order to make the error of aero-engine reliability model smaller, error analysis was made for traditional aero-engine reliability model, the reason that reliability indexes over expand was pointed out, and the aero-engine reliability model based on failure modes in structural system considering aero-engine structural system and the failure mechanics characteristics was established. The reliability calculation method of each layer was given. Structural system reliability model of aero-engine based on failure modes, which considers relative independence, timeliness and time varying of failure rate, can avoid problems such as missing important failure modes and over expansion of reliability index, so it has great engineering application value.