并联6-UPS稳定平台瞬态分析与谱分析

并联稳定平台在工作过程中受到各种动态力的激励作用,会直接影响稳定平台的动态特性和使用效能.作者借助Pro/E和ANSYS软件工具,对并联6-UPS稳定平台进行了瞬态分析,用以研究在多次冲击工况下稳定平台的响应情况.在此基础上,通过施加单点响应谱激励,对该稳定平台进行了响应谱分析,得到了平台在随机载荷下的响应情况.分析结果表明,该并联6-UPS稳定平台的动态特性满足车载使用要求,且球铰和低阶固有频率是影响其动态特性的主要因素,可为稳定平台的结构和性能优化提供参考.

Transient and Spectrum Analysis of the Parallel Stabilized Platform Based on 6-UPS Structure

The parallel stabilized platform suffers the impacts from varieties of dynamic incentives which may disturb directly its working efficiency. By means of Pro/E and ANSYS software, the transient analysis of the parallel stabilized platform based on 6-UPS structure were conducted so as to study the transient responses of such stabilized platform under the multi-steps impact working condition. Furthermore, single-point response spectrum analysis was done by exerting the stimulus of single displacement spectrum, and then its stress and displacement responses under random load were obtained. The results indicate that the dynamic property of the parallel stabilized platform is qualified to the vehicle working condition. The spherical joints and the low order natural frequency are the key factors that impact the dynamic property. This research offers the reference for the optimization of the structure and property of the parallel stabilized platform.