副车架计算模态分析中衬套动刚度的当量方法.PDFVIP

第37 卷 第3 期 噪 声 与 振 动 控 制 Vol 37 No.3 2017 年6 月 NOISE AND VIBRATION CONTROL Jun. 2017 文章编号：1006-1355(2017)03-0107-05 副车架计算模态分析中衬套动刚度的当量方法 苏瑞强，丁渭平，杨明亮，申 超，高思奇, 王守健 （西南交通大学 机械工程学院，成都 610031 ） 摘 要：针对副车架计算模态分析中橡胶衬套的处理问题，在有限元分析软件中以CBUSH 单元模拟橡胶衬套，并 以橡胶衬套动刚度的当量值作为CBUSH 单元的刚度赋值。从动刚度与静刚度之比的角度出发，提出一种基于橡胶衬 套静刚度的动刚度当量方法，称之为“橡胶衬套动刚度的修正系数当量方法”。运用正交试验设计，通过试验模态与计 算模态的对比验证所提橡胶衬套动刚度当量方法的有效性，同时，明确不同位置的橡胶衬套对模型精度的影响规律， 可应用于相关建模分析中。 关键词：振动与波；副车架；橡胶衬套；动刚度；当量方法；正交试验 中图分类号：U463 ；O241.82 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1355.2017.03.021 Rubber Bush ’s Dynamic Stiffness Equivalent Method in Modal Analysis and Computation of Subframes SU Rui-qiang , DING Wei-ping , YANG Ming-liang , SHEN Chao , GAO Si-qi , WANG Shou-jian （College of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China ） Abstract : Aiming at the problem of rubber bush’s boundary in modal analysis and computation of subframes, CBUSH elements are used to simulate the rubber bush by means of finite element analysis software with equivalent value of rubber bush ’s dynamic stiffness. This method is known as rubber-bush ’s dynamic-stiffness equivalent method. In this method, the dynamic stiffness of the rubber bush is always replaced by the static stiffness multiplied by a correction coefficient according to the ratio of dynamic stiffness to static stiffness. This method is realized by orthogonal test design. By comparing modals of testing with the modals of computation, the validity of the dynamic stiffness equivalent method of the rubber bushes is proved. The influence of the rubber bush ’s location on the a