摘要
从微分方程出发,利用谱元法推导梁的解析解,并验证其准确性,以此研究平面周期桁架结构振动传递特性,即带隙和波形转换作用;根据卫星主承力结构桁架周期性特点,建立服务舱和载荷舱简化模型,利用谱元法分析其振动传递带隙特性,并进行试验验证。理论和试验表明:周期桁架结构具有良好的隔振特性,尤其是阻带内振动得到很大衰减,说明周期桁架在卫星主结构隔振设计中具有广阔应用前景。
The analytical result of periodic truss structures was deduced by Spectrum Element Method (SEM), and then validated by FEM. The vibration transfer characteristics of the periodic truss structures, such as the band gap and the waveform conversion mechanism, were analyzed and proved. Based on the results, a simplified periodic truss model of the satellite structure was established, and the dynamic transfer trait was analyzed with the SEM and experiments. The simulation and experiment results show that the periodic truss structure has better vibration isolation properties. Especially, the vibration is greatly reduced in pass band. So the periodic truss has a great application foreground in satellite structure design.
出处
《噪声与振动控制》
CSCD
2016年第2期12-16,共5页
Noise and Vibration Control
关键词
振动与波
谱元法
振动特性
周期桁架
带隙
试验验证
vibration and wave
spectrum element method
vibration characteristic
periodic truss
band gap
experiment varification
