摘要
采用有限元模态分析法对国内某机匣加工中心床身进行了动态特性分析,为探求弹性支承工况下最佳的结合面处理方法,分别采用弹簧单元法与完全约束法对床身-垫块结合部进行了处理,并得到了前四阶模态的固有频率与振型,找出了薄弱环节。将其与实验模态分析法所得结果进行对比,结果表明在弹性支承工况下,通过完全约束法对结合部进行简化处理所造成的误差很小。最后针对薄弱环节提出了改进建议,为进一步研究及改进提供依据及有效模型。
The Finite Element Modal method is used to analyze a domestic cartridge receiver machining center bed. In order to find the method which minimize the error of FEM analysis to simplify the joint surface in case of elastic support, line-spring elements method and complete constrained boundary method are used to simplify the joint surface between the bed and base mounting pad. The four natural frequencies and modes are given. Then where the bed was weakest is found. Being compared with the result carried out by Experimental Modal Analysis, the result of Finite Element Modal Analysis is verified and thus error of analysis by using the complete constrained boundary method is proved to be small in case of elastic support. Finally, a suggestion for improvement is proposed, which gives a feasible method and useful Finite Element model for further research and improvement.
出处
《机械设计与研究》
CSCD
北大核心
2016年第3期65-68,共4页
Machine Design And Research
基金
国家重大专项资助项目(2013ZX0400-1061)
