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汽车空气弹簧动静刚度特性分析

Dynamic and Static Stiffness Characteristics of Automobile Air Spring

  • 摘要: 针对某一膜式空气弹簧,运用非线性有限元软件ABAQUS建立有限元模型.首先通过模拟空气弹簧静特性试验,得出了空气弹簧在给定位移和一定初始气压情况下的静刚度特性曲线,其次改变空气弹簧的物理参数,分析初始气压、帘线加强层的角度和各层间的距离对空气弹簧垂向静特性的影响,最后建立动刚度模型,研究在特定工作气压下振动频率对动刚度的影响.计算结果表明,该膜式空气弹簧的帘线层角度、帘线层间距的改变对其静刚度会产生相应的影响;不同频率下,空气弹簧的动刚度也将发生相应改变以适应不同工况.

     

    Abstract: For a membrane air spring, a finite element model was established by nonlinear finite element software ABAQUS. By simulating the static test of the air spring, the static stiffness curve of the air spring under a given displacement and a certain initial pressure were obtained. The physical parameters of the air spring were changed, and the influence of the initial pressure, the angle of the cord reinforcement layer, the distance between the layers on the vertical static characteristics of the air spring were analyzed. Finally, the dynamic stiffness model was established to study the impact of the vibration frequency on the dynamic stiffness. The calculation results showed that the change of the cord layer angle and the cord layer distance of the membrane air spring have corresponding effects on the static stiffness of the membrane air spring. The dynamic stiffness of the air spring will also be changed at different frequencies to adapt to different working conditions. Our findings can provide a reference for the matching of air spring and vehicle suspension system.

     

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