航空发动机复材外涵机匣静热强度试验方法研究

Research on Static Thermal Strength Test of Composite Bypass Casing of Aero-engine

目的提出一种飞机发动机外涵机匣静热强度考核试验方法,实现对高温环境下机械载荷与气流压力载荷同时作用时外涵机匣的强度考核。方法以典型外涵机匣模拟件为试验件,利用所设计的试验装置与外涵机匣模拟件合围成一套能够施加温度载荷、机械载荷以及内腔气压载荷的被试结构,在通过温度加载系统、静力加载系统和气压加载系统同时对被试结构模拟飞行过程中的真实工况环境。结果通过设计的试验能同时施加飞行过程中外涵机匣所承受的主要温度、机械及气流压力载荷。结论提出的静热强度试验方法,能够充分对航空发动机外涵机匣飞行过程中的综合环境进行地面模拟考核,取代以往金属外涵机匣考核的温度载荷等效方式,可实现对复材外涵机匣工艺件进行考核,为外涵机匣减重设计提供依据。

The work aims to propose a static thermal strength test method of composite bypass casing of aero-engine and consider mechanical and pressure loads in high temperature environments.The simulated structure of a typical bypass casing was taken as the test object,the designed test device and the simulated structure of a typical bypass casing were used to form a tested structure that can apply temperature load,mechanical load and pressure load,and then the temperature loading system,the static loading system and the pneumatic loading system were used simultaneously to impose the real working environment during the flight on the tested structure.The actual load conditions that affect the strength of the bypass casing can be applied simultaneously through the designed test.The static thermal strength test method proposed in this paper can replace the previous method and is generally applied to the bypass casing of metal materials,using pressure load instead of temperature load.The method proposed in this paper can be used to test composite bypass casing and provide an important basis for the weight reduction design of the bypass casing.