摘要
对卫星振动频率随量级增加而出现下降,即振动频率"漂移"的现象进行了初步分析。发现随振动量级的增加,结构的非线性表现突出。结构的刚度下降和阻尼增加,可认为主要是由蜂窝材料的非线性因素所致。
The phnomena of natural frequency decreased as excitation level increased by comparing vibration test datum was analyzed in this paper. The determine the nature was given for the phnomena of stiffness decreased and damping rations incrased as excitation level. It was considered that nonlinear factor produced the phnomena of natural frequency change.
出处
《上海航天》
2004年第3期44-47,共4页
Aerospace Shanghai
关键词
卫星结构
蜂窝板
非线性振动
频率漂移
模态分析
Satellite structure
Honeycomb sandiwish panel
Nonlinear vibration
Natural frequency change
Mode analysis
