基于纯随机激励的热模态试验技术研究

The study of thermo-modal test technique based on true-random excitation

考虑热影响的结构模态试验技术研究对高空高速越层飞行器的飞行安全具有重要的意义,主要介绍了基于纯随机激励的热模态试验技术,并以一个三角翼的热模态试验为例,阐述了热模态试验原理、方法,最终获得了三角翼的前四阶振动频率随时间变化的规律,为高空高速越层飞行器结构振动特性验证打下了坚实的基础。

This paper took the structure of wing as example to introduces thermo-modal test technique based on true-random excitation. At one time, the theory and methodology of thermo-modal test is introduced. Variation characteristics of the first and fourth frequency along with time have been obtained. This technique has a certain engineering application value for hypersonic vehicles.