立式四轴舱体内腔加工专机机械动力学建模与分析  

Mechanical dynamics modeling and analysis of the special machine for vertical inner cavity

作　　者：李凌霄 成群林[1] 平昊 袁桢棣 叶磊 LI Lingxiao;CHENG Qunlin;PING Hao;YUAN Zhendi;YE Lei(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,CHN)

机构地区：[1]上海航天精密机械研究所,上海201600

出　　处：《制造技术与机床》2022年第8期14-20,共7页Manufacturing Technology & Machine Tool

基　　金：上海市自然科学基金项目(21ZR1427600);上海航天技术研究院科技委项目(KJW-KT-ZYZ-2021-10)。

摘　　要：针对立式四轴舱体内腔加工专机,基于动态子结构法进行了机械动力学建模。求解了专机动结合部的滚珠丝杠副和直线导轨副的动态刚度特性。由建立的动力学模型分析整机的固有模态,应用解析法求解整机的固有频率。应用有限元软件建立专机有限元模型,求解结合部刚性接触与设定了动态刚度性的整机固有频率与振型及谐响应分析结果。结果显示建立的含动态刚度的动力学模型能够有效镜像专机动力学特性,可应用于专机的动力分析与数字孪生虚拟样机研究。For the vertical four-axis inner cavity machining special machine,the mechanical dynamics modeling is carried out based on the dynamic sub-structure method.The dynamic stiffness characteristics of the ball screw pair and linear guide pair of the special motorized joint are solved.The natural mode of the whole machine is analyzed by the established dynamic mode,and the natural frequency is solved by the analytical method.The finite element mode of the machine is established by the finite element software,and the analysis results of the natural frequency,mode shape and harmonic response of the whole machine with the rigid contact of the joint and the dynamic stiffness are set.The results show that the established dynamic model with dynamic stiffness can effectively mirror the dynamic characteristics of the machine,and can be applied to the dynamic analysis of the machine and the research of the digital twin virtual prototype.

关 键 词：内腔加工专机 子结构法 结合部动特性 动力学建模 

分 类 号：TH113.1[机械工程—机械设计及理论]