自由膜式空气弹簧非线性有限元分析  

Nonlinear finite element analysis of the free membrane-type air spring

作　　者：陈昊森 唐华平[1] 王胜泽 李云召 CHEN Haosen;TANG Huaping;WANG Shengze;LI Yunzhao

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]中车株洲电力机车有限公司,湖南株洲412000

出　　处：《现代机械》2018年第4期46-50,共5页Modern Machinery

基　　金：南车120km/h米轨城际动车组研制项目(2011NCK020)

摘　　要：对一种自由膜式空气弹簧进行非线性有限元分析,建立自由膜式空气弹簧非线性柔性体有限元动力学模型,研究其各项力学性能。橡胶气囊采用分层壳单元耦合建立,内外层橡胶采用一次多项式Mooney-Rivlin橡胶材料本构模型,内置帘线层采用帘线织布材料本构模型。利用AIRBAG模型模拟橡胶气囊气固耦合,对建立起的有限元模型进行力学仿真计算,数值计算结果对比试验表明模型精度较高。对其进行力学分析,得出橡胶气囊初始气压对空气弹簧影响较大,刚度值随气压增大呈非线性增长;帘线层层数对垂向刚度影响较小,横向刚度影响较大;辅助弹簧对空气弹簧垂向及横向刚度影响较大。所得结果为进一步进行整车动态分析及空气弹簧设计研究提供理论以及数据基础。The nonlinear finite element analysis of a free membrane-type air spring was carried out. The nonlinear flexible body dynamics model of the free membrane-type air spring was established to study its mechanical properties. The rubber airbag was coupled with layered shell element,and the inner and outer rubber layers adopted primary polynomial Mooney-Rivlin rubber material constitutive model,and the built-in cord layers adopted the woven fabric constitutive model. The AIRBAG model was used to simulate the gas-solid coupling of rubber gasbag,the mechanical calculation of the established model is carried out,and the numerical results of the model were more accurate than the experiment. The mechanical analysis shows that the initial pressure of rubber air bag has great influence on the air spring,and the stiffness increases nonlinearly with the increase of air pressure. The number of cord layers has little effect on vertical stiffness,and great influence on lateral stiffness. The auxiliary spring has great influence on the vertical and lateral stiffness of the air spring. The results provide theoretical and data basis for further dynamic analysis of the whole vehicle and the design of air spring.

关 键 词：空气弹簧 非线性 有限元分析 柔性体 

分 类 号：U264.8[机械工程—车辆工程]