C/SiC箱型结构的热模态试验研究  

Thermal modal test of a C/SiC box structure

作　　者：于开平[1] 郑博文 陈晓岚[2] 李昕 YU Kaiping;ZHENG Bowen;CHEN Xiaolan;LI Xin(School of Astronautics,Harbin Institute of Technology,Harbin 150001,China;Beijing Institute of Electronic System Engineering,Beijing 100854,China)

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]北京电子工程总体研究所,北京100854

出　　处：《振动与冲击》2020年第18期209-214,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11172078)。

摘　　要：飞行器速度随着科学技术的发展不断提高,导致飞行器面临着极其严酷的高温环境,因此在地面上的热模态试验具有重要意义。作为具有应用前景的一种结构,箱型结构具有重要的研究价值;以箱型结构的C/SiC典型构型件为研究对象,对其在高温环境中的振动特性进行了研究。结合现有的试验技术,该研究提供了一套热模态试验的方案,给出了C/SiC典型构型件在高温环境中的模态频率和模态振型;其优点在于能够最大程度的保证试验件的独立完整性,不会在激励和测量的过程中产生附加刚度、附加质量等影响。研究成果为箱型结构在高温环境中的模态研究提供参考。As the speed of aircrafts increases with the development of science and technology,the aircraft faces an extremely harsh high-temperature environment.Therefore,the thermal modal test on the ground is of great significance.As a structure with application prospects,the box-type structure has been attracted much attension and is becoming an important research object.The vibration characteristics of a C/SiC typical component,being a box-type structure,in the high-temperature environment were studied.Combining with the existing test technology,a set of thermal modal test schemes was presented and the modal frequencies and modal shapes of the C/SiC typical component in a high-temperature environment were provided.The advantage of the method is that there are no additional stiffness and additional mass generated during the excitation and measurement process.The research provides a reference to the modal study of box-type structures in the high-temperature environment.

关 键 词：C/SIC 箱型结构 高温环境 模态试验 

分 类 号：V416.2[航空宇航科学与技术—航空宇航推进理论与工程]