摘要
介绍基础激励下结构随机振动响应的分析方法,并对某配重卫星轴向和横向的窄带随机激励进行有限元计算。通过对此卫星结构加速度响应的均方根值、累积均方值和功率谱密度等统计量的分析,研究随机振动试验中卫星结构的随机响应,以此考察卫星承受此种动力学环境的能力,为卫星上仪器设备的减振方案设计和提高卫星发射的可靠性提供参考。
The analysis technique of the structure random vibration response excited by the base is described. The appropriate finite element model of the dummy satellite is created for simulating the vibration qualification ground test, and the response analysis on axial and transverse random vibration tests of the dummy satellite have been done based on the finite element model. By analyzing the root mean square（RMS）, the cumulative mean square（CMS） and the power spectrum density（PSD） of the acceleration response, the random vibration characteristic of the dummy satellite and the performance of the satellite against the dynamic environment is assessed. The results obtained are useful in improving the design of the instruments and in providing some reference to the launch reliability of the satellite.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2006年第1期16-19,共4页
Journal of Mechanical Strength
关键词
卫星
随机振动
有限元法
动力学环境
基础激励
Random vibration
Finite element method
Dynamic environment
Driven-base excitation
