航天器随机振动和噪声试验条件设计方法

Specifications for random vibration and acoustic tests

随机振动和噪声环境条件对航天器的设计与试验验证至关重要。文章阐述了航天器动力学环境模拟试验的原则,重点介绍了试验量级和试验持续时间的确定方法及其优缺点。确定试验量级的方法包括极限包络法和正态容差限法,确定试验持续时间的方法包括逆幂律、疲劳损伤和首次穿越方法。

The random vibration and acoustic environment is important aspect in the design and test of spacecraft.This paper discusses the principle of spacecraft dynamic tests,and the methods for determining the test level and the duration,as well as their advantages and disadvantages.The test level can be identified by the envelope limit or the normal tolerance limit,while the test duration can be determined from the inverse power law,the fatigue damage or the first passage model.