一种典型C/SiC构型件的热噪声适应性试验研究

航天器结构用新型C/SiC复合材料在飞行过程中会承受气动加热和噪声复合环境，容易出现疲劳破坏，需要进行地面热噪声试验考核。针对一种典型的C/SiC蒙皮骨架构型件，利用行波管开展热噪声试验研究，对试验件、试验装置和试验方法等进行介绍。利用试验获得的有效数据揭示热噪声复合环境下该C/SiC构型件的失效模式，验证其热噪声环境适应性。

Experimental research of thermal-acoustic adaptability of a typically-configured C/SiC specimen

The carbon fiber toughened silicon carbide matrix composite(C/SiC) used in aircraft structure will be in a severe aerodynamic thermal-acoustic environment during the flight, which might damage the structure. Therefore, it is necessary to conduct the thermal-acoustic test in the laboratory. In this paper, an progressive wave tube is used for the thermal-acoustic test of a typically-configured C/SiC skin frame specimen. The detailed experimental set-up and the test method are given. From the valid test data, the failure mode of the specimen is identified, and the thermal noise environmental adaptability of the configuration part is validated.