摘要
应用子结构法建立了一种UPS型6自由度并联机床及其部件的有限元实体模型,并通过模态实验和有限元模态分析对有限元实体模型进行了验证.应用有限元法对机床模型进行了谐响应分析.获得了机床各节点沿机床虚拟x、y、z轴向的位移谐响应曲线.在此基础上,对该并联机床谐响应规律进行了分析,明确了该机床谐响应的特点和响应幅度的数量级,为该类机床的结构优化设计提供了理论依据.
A finite element full-scale entity model for 6-UPS parallel kinematic machine (PKM) and its accessories are established based on substructure method. It is further confirmed through a modality study and a finite element modality analysis. The displacement harmonic response curves of the nodes on the virtual x, y and z axes of PKM are obtained through a harmonic response analysis on PKM performed with a finite element method. Based on these resultant curves, a law of harmony response on the PKM is investigated. The resultant parameters clearly demonstrate a harmony response characteristic of PKM and its response scope magnitude, which can provide an important theoretical basis for the optimal structure design of PKM.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2008年第5期40-43,共4页
Journal of Beijing University of Posts and Telecommunications
基金
中国博士后基金项目(2005038083)
关键词
并联机床
谐响应
STEWART平台
动力学
parallel kinematic machine
harmonic response
Stewart platform
dynamics