摘要
采用等效弹簧模型对空间光学遥感器主镜的旁瓣子镜与中央子镜的锁紧刚度进行简化处理,分别分析了"旁瓣子镜与中央子镜之间锁紧力"和"旁瓣子镜与中央子镜之间定位装置的定位球直径"对空间光学遥感器主镜结构固有频率的影响。分析结果表明,旁瓣子镜与中央子镜通过运动支承定位并由锁紧装置锁紧后,结构1阶固有频率由整体式结构的33.592赫兹下降为十几赫兹,下降幅度约50%。增大锁紧力和定位球直径都可以提高主镜结构的固有频率,但是增大定位球直径对固有频率的提高比增大锁紧力对固有频率的提高要明显得多。
The locking stiffness between the petal and the central part was simplified by the equivalent spring model. Using this model, the effects of the locking force and the ball diameter on the modal frequencies of the structure were analyzed. The analytical results show that the fundamental frequency of the structure connected by the kinematic couplings declines from 33. 592 Hz of the fixed structure to 10-20 Hz, and it is more effective to increase the modal frequencies of the structure connected by the kinematic couplings by increasing the diameters of the location balls than by increasing the locking force.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2008年第2期21-27,共7页
Chinese Space Science and Technology
关键词
等效弹簧模型
展开机构
刚度
锁定紧固装置
光学遥感器
航天器
Equivalent spring model Deployment mechanism Stiffness Locking fastener device Optical remote sensor Spacecraft
