基于有限元方法的贴片机整机模态研究  

Mode Research of the Placement Machine Based on FEM

作　　者：肖永山[1] 刘少军[1] 宋福民 

机构地区：[1]中南大学机电学院,长沙410083 [2]广州羊城科技实业有限公司,广州510520

出　　处：《机械设计与研究》2008年第2期103-106,共4页Machine Design And Research

基　　金：国家火炬计划资助项目(2003EB041301)

摘　　要：基于有限元技术进行贴片机整机模态分析。建立贴片机的数学模型和有限元模型;基于建立的模型,对影响装配体固频与振型的因素进行了仿真分析;根据分析结果,优化模型并进行了整机的模态分析;最后对仿真结果进行了实验验证。分析结果表明,动静比(动物体质量/静物体质量)越小,整机固频越小;重心越高,固频越小;优化模型的1阶固频得到提高,避开了控制系统的激振频率,能有效地提高整机的动态性能。The modal analysis of the automatic placement machine is made based on FEM technology. Both the mathematic model and the FEM model are built. The simulation is done for the factors that impact the natural frequency and the mode shapes. The system model is optimized and the mode analysis of the whole machine is made. Finally, the experiment is performed to validate the simulation results. The results indicate that the smaller the mass ratio of moving object to still object is, the smaller the natural frequency is ; the higher the center of gravity is, the smaller the natural frequency is; and the first order natural frequency of the optimized model is improved, so it avoids the exciting frequency of the control system and can increase the system dynamic performance.

关 键 词：贴片机 FEM 动力学模型 模态分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]