摘要
本文根据运动平台上某跟踪系统主镜筒的设计方案,在ansys平台下建立系统有限元分析模型,求得了主镜筒的前十阶固有频率和结构的强弱分布,确定了结构分析的重点为主、次镜的相对位置变化。定义了描述主、次镜相对位置变化的参量及其计算方法,并在冲击载荷作用下计算分析了主、次镜相对位置的瞬态响应,总结了主镜筒的响应规律。分析结果为跟踪系统总体结构振动分析提供方法参考,为系统动力学优化设计提供理论依据。
According to the structural design scheme for the main tube of a tracking system fixed on a moving vehicle,the Finite Element Method （FEA） model is established with the software Ansys Workbench.The first ten natural frequency and the distributions of the structural strength are obtained.And it is concluded that the relative position of the primary and secondary mirror is the interesting factor.Therefore,three parameters are defined to describe the variance of the relative position.Finally,the transient responses of three parameters due to the load impact are analyzed.The analysis results are provided for the dynamic optimal design and the vibration analysis of the whole tracking system.
出处
《光电工程》
CAS
CSCD
北大核心
2011年第8期73-78,共6页
Opto-Electronic Engineering
关键词
有限元法
振动分析
主镜筒
finite element method （FEM）
vibration analysis
main tube
