摘要
本文针对卫星振动试验中的频率漂移现象进行了初步分析 ,通过试验数据对比、等效线性化模型模拟和单自由度非线性模型模拟计算 ,对随振动试验载荷烈度增加而导致的固有频率降低、模态阻尼增大的现象作了定性解释。
In vibration test,the phenomenon of natural frequency drift and damping ratio increase,as excitation level raises,is analysecl by comparing vibration test data,simulation of equivalent linear model and calculation of nonlinear model with single degree of freedom.Its nature is qualitatively explained and the reason is considered as due to the influence of nonlinear factors.
出处
《振动与冲击》
EI
CSCD
北大核心
2003年第4期23-25,共3页
Journal of Vibration and Shock
关键词
固有频率
卫星
频率漂移
振动频率
satellite structure,vibration test,nonlinear vibration,natural frequency change,mode analysis
