民用航空发动机限寿件适航符合性方法

Airworthiness Compliance of Life-limited Part of Civil Aircraft Engine

针对中国民用大涵道比涡扇发动机型号取证的需要,开展发动机限寿件适航符合性方法研究。分析欧美航空发动机限寿件适航要求的安全目标,对AC33.70-1和AMC515发动机限寿件定寿方面的适航符合性要求进行读解分析。以典型航空发动机为例,研究了限寿件的判定方法,分析发动机限寿件适航审定过程中的关键环节,从发动机载荷谱制定、材料性能数据、安全寿命制定3个方面给出航空发动机限寿件适航符合性验证的关键流程和方法。参考国外设计标准给出限寿件应力分析和试验方案设计流程,给出限寿件寿命散度系数的获取方法。本研究为编制航空发动机限寿件的适航指南提供参考依据。

The airworthiness compliance method of civil aircraft engine life-limited parts is investigated, according to the needs of type forensics for civil high bypass ratio turbofan engine in China. Engine life-limited parts are rotor and major static structural parts whose primary failure is likely to result in a hazardous engine effect. Typically, engine life-limited parts include, but are not limited to, disks, spacers, hubs, shafts, high-pressure casings, and non-redundant mount components. The safety goals for the airworthiness requirement of aircraft engine life-limited parts in European and American are analyzed. The airworthiness compliance requirement for the life evaluation of engine life-limited parts in AC33.70-1 and AMC515 are analyzed and interpreted. The key process and method of aircraft engine life-limited part airworthiness conformity test are given. The model of safe life prediction for life-limited parts is founded. The proposed method provides an important reference for making airworthiness guide for aircraft engine life-limited parts.