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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。
The research on the modal experimental technology considering the heat influence is of great significance to the flight safety of the high-altitude high-altitude aircraft. The thermal modal testing technology based on pure random excitation is mainly introduced. Taking a thermal model test of the delta wing as an example , The principle and method of thermal modal test are expounded. Finally, the law of the first four-order vibration frequency of the delta wing changes with time is obtained, which lays a solid foundation for the verification of structural vibration characteristics of the high-altitude and high-altitude aircraft.