航空发动机限寿件批准寿命适航验证方法

以传统的安全寿命法为基础,研究了航空发动机限寿件批准寿命适航验证流程和审定要素.以限寿件适航要求和咨询通告符合性方法为指导,借鉴航空发动机通用规范对关键件的定寿管理方法,从计算分析验证和试验验证给出限寿件批准寿命适航符合性验证的流程和方法.以典型的民用航空发动机为例研究了限寿件的判定准则.从限寿件结构危险点的判定方法、载荷谱的处理和应力分析给出了限寿件批准寿命计算分析验证的关键技术;从试验条件、试验温度方案、试验应力系数和散度系数的获取给出了限寿件批准寿命试验验证的关键技术.为航空发动机限寿件批准寿命适航审定提供指导方法,也为中国民用航空局编制航空发动机限寿件适航咨询通告提供参考依据.

Methods of airworthiness verification for approved life of aero-engine limited-life parts

Based on the traditional safe life method, studies on verification process and certification factors of airworthiness of approved life for aero-engine life-limited parts were conducted. Airworthiness requirements and compliance of advisory circular for life-limited parts were taken as a guide, and management methods of life-limited parts life determination in the general specification for aero-engine were used as a reference. The process and methods of the airworthiness compliance verification were given by calculation analysis and experimental verification. The criterion of life-limited parts was studied using typical civil aero-engines. The key technologies of the calculation and analysis verification for approved life of life-limited parts were given from the criterion, the processing of load spectrum and stress analysis of their structural dangerous points. The key technologies of the experimental verification were given by obtaining the experimental conditions, scheme of experimental temperature, experimental overstress factor and scatter factor. A method of guidance is provided for the airworthiness certification of approved life for aero-engine life-limited parts. The proposed methods provide an important reference for Civil Aviation Administration of China to draw up airworthiness advisory circular of aero-engine life-limited parts.