摘要
使用正弦扫描振动模拟低频瞬态振动环境是航天工业的一种传统试验方法,其对产品的环境考核可能同时存在欠试验和过试验。首先对两者等效性进行分析,进而采用冲击响应谱、最大响应谱等相关理论,对等效正弦扫描振动试验条件制定中的扫描速率、阻尼系数进行了研究,并给出参数选择建议。最终提出了制定正弦扫描振动环境试验条件的步骤,为采用正弦扫描试验进行低频瞬态环境适应性考核提供借鉴。
The use of sinusoidal scanning vibration to simulate low-frequency transient vibration environment is a traditional testing method in the aerospace industry,and its environmental assessment of products may have both under testing and over testing simultaneously.Firstly,the equivalence between the two is analyzed,and then relevant theories such as impact response spectrum and maximum response spectrum are used to study the scanning rate and damping coefficient in the formulation of equivalent sinusoidal scanning vibration test conditions,and parameter selection suggestions are provided.Finally,steps are proposed to establish the testing conditions for sinusoidal scanning vibration environment,providing reference for the low-frequency transient environment adaptability assessment using sinusoidal scanning testing.
作者
王帅
马泽鹏
周畅
张明明
荣克林
WANG Shuai;MA Zepeng;ZHOU Chang;ZHANG Mingming;RONG Kein(Beijing Institute of Structure and Environment Engineering,Beijing,100076)
基金
国家自然科学基金(12002055)。
关键词
瞬态振动
正弦扫描试验
冲击响应谱
最大响应谱
条件制定
transient vibration
sinusoidal scanning test
shock response spectrum
maximum response spectrum
condition formulation
