摘要
基于工程热力学和空气动力学理论分别建立了带附加气室空气弹簧系统各元部件的状态方程和动力学方程，为了简化复杂的非线性模型，根据泰勒级数理论，利用小偏差线性化的方法在小振幅的条件下对各方程进行了线性化处理，并推导出了带附加气室空气弹簧动刚度的线性化模型。为了验证线性化模型的精度和分析各参变量对弹簧动刚度的影响关系，以美国Firestone公司生产的 1T15M-2型膜式空气弹簧作为计算对象，分别利用空气弹簧动刚度的非线性和线性化模型计算了弹簧动刚度与各因素之间的动态变化关系，计算结果表明空气弹簧内压、节流孔有效面积、弹簧振动频率以及附加气室容积等因素均会影响弹簧动刚度；动刚度的线性化与非线性模型在各因素影响下的变化曲线基本吻合。
Abstract
Based on the theory of thermomechanics and fluid dynamics, the state equations and dynamic equations of air spring, auxiliary chamber and orifice are established. In order to simplify the complex nonlinear model, supposing the amplitude of vibration is small, the dynamic equations are linear processed with small deviation linear method which based on Taylor series, then the linearied model for dynamic stiffness of air spring is deduced. In order to verify the precision of linearied model and analyze the effect of each parameter on dynamic stiffness of air spring, taking the Firestone 1T15M-2 air spring as example, the dynamics stiffness of air spring with varying parameters was calculated with the dynamic stiffness nonlinear model and the dynamic stiffness linearied model respectively. The results show that air spring pressure, area of orifice, frequency of vibration, volume of auxiliary chamber all affect dynamic stiffness of air spring. Under the affection of each factor, the change curves of linearied model and that of nonlinear model are closed on the whole.
关键词
空气弹簧 /
附加气室 /
动刚度 /
线性化模型
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Key words
Air spring /
Auxiliary chamber /
Dynamic stiffness /
Linearied model
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王家胜;朱思洪.
带附加气室空气弹簧动刚度的线性化模型研究[J]. 振动与冲击, 2009, 28(2): 72-76
Wang Jiasheng;Zhu Sihong.
STUDY ON LINEARIED MODEL FOR DYNAMIC STIFFNESS OF AIR SPRING WITH AUXILIARY CHAMBER[J]. Journal of Vibration and Shock, 2009, 28(2): 72-76
中图分类号：
TH135
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