一种飞机发动机影响区设备的可靠性试验剖面设计方法

Design Method for Reliability Test Profile of Equipment in the Affected Area of Aircraft Engine

目的准确制定飞机发动机影响区设备的可靠性试验剖面,提出一种可靠性试验剖面设计方法。方法结合飞机发动机影响区设备的振动“宽带随机信号叠加窄带尖峰信号”的特点,采用工程截取等效法对实测振动数据分析归纳,得到振动试验谱。然后根据振动应力简化原则和飞机典型任务状态的持续时间及其占整个任务剖面的时间比例得到振动应力条件,并合成可靠性试验剖面。结果使用此方法对某飞机发动机影响区设备的振动数据进行处理,得到飞机发动机影响区设备的可靠性试验剖面。结论提出的工程截取等效法非常适合发动机影响区设备振动信号的分离和归纳;提出的可靠性试验剖面设计方法,为飞机发动机影响区设备的可靠性剖面设计工作提供了新思路,对飞机发动机影响区域设备的可靠性设计有重要意义。

In order to accurately formulate the reliability test profile of equipment in the affected area of aircraft engine,a design method for reliability test profile is proposed.According to the vibration characteristics of the equipment in the affected area of aircraft engine,which is consisting of broadband random signals and narrowband spike signals,the engineering interception equivalent method is used to analyze and summarize the measured vibration data to obtain the vibration test spectrum.Then,according to the duration of the typical mission state of the aircraft and the time proportion of the entire mission profile,the vibration stress conditions are obtained according to the simplification principle proposed in the article and the reliability test profile is synthesized.By using this method to process the vibration data of equipment near an aircraft engine,the reliability test profile of the equipment in the affected area of aircraft engine is obtained.The engineering interception equivalent method proposed in this paper is very suitable for the separation and induction of vibration signals of equipment near the engine.The reliability test profile design method proposed in this paper provides a new idea for the reliability profile design of equipment in the aircraft engine affected area,and is of great significance for the reliability design of equipment in the aircraft engine affected area.