摘要
在星箭连接支架外表面附加约束阻尼层可抑制星箭对接界面的振动,从而降低卫星在发射过程中所承受的振动和噪声载荷。本文将有限元技术与矩阵特征值摄动分析方法相结合,就卫星支架局部修改(附加约束阻尼层)对星箭系统动态特性的影响进行了分析。以已有星箭系统结构的模态信息为基础,给出了支架部位附加约束阻尼层后星箭系统动态特性变化的定量计算方法,并证明了该减振技术能够不明显的改变原星箭系统的固有特性。
Spacecraft Vibration Isolation Platform is designed to improve the dynamic environment during spacecraft launch. The dynamic characteristics of the platform transmissibility in the transverse direction, including a strong interaction between the translational and angular motion, are more complicated than that in the longitudinal direction due to an anti-resonance in the transverse vibratory transmissibility of the platform. A general transverse dynamic model of the vibration isolation platform is established and the anti-resonance in the transmissibility is discussed, which reveals that the vibration isolation effectiveness of the platform can be significantly improved in case of proper design for the anti-resonance frequency is properly designed.
出处
《应用力学学报》
EI
CAS
CSCD
北大核心
2007年第4期669-673,共5页
Chinese Journal of Applied Mechanics
基金
国防科工委十五民用航天预研项目
关键词
约束阻尼层
矩阵特征值
摄动
whole spacecraft vibration Isolation,transverse vibratory transmissibility,anti-resonance.
