Finite Element Analysis of Vertical Stiffness of Air Spring System
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摘要: 对空气弹簧系统材料非线性、几何非线性和状态非线性问题以及气固耦合问题进行了理论分析,得到了在有限元分析中的处理方法.用有限元软件ABAQUS建立了空气弹簧系统有限元模型,其中帘线采用rebar单元.计算了空气弹簧系统的垂向刚度,并分析了气体压力和帘线角对垂向刚度的影响.有限元计算结果表明,空气弹簧系统垂向刚度随气体压力的增加而增加,随帘线角的增大而略减小.Abstract: The vertical stiffness problem of an air spring system was formulated for finite element analysis,and the nonlinearity of the material,geometry and state,as well as the air-solid coupling,were analyzed theoretically.Finite element model of an air spring system was established with the commercial software ABAQUS,and the rebar element was used for the cords.The vertical stiffness of the air spring system was calculated,and the effects of air pressure and cord angle on it were analyzed.The results show that the vertical stiffness increases with an increase in air pressure,decreases a little with an increase in cord angle.
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Key words:
- finite element method /
- air spring /
- stiffness /
- characteristic /
- nonlinearity
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