空气弹簧刚度特性模型及气体非理想化修正方法研究

Study on Air Spring Stiffness Characteristic Model and Amendment to the Non-ideal Gas

基于范德瓦耳斯方程建立了3类空气弹簧的刚度特性模型,通过理论分析可知,以往的模型不能反映范德瓦耳斯常数、空气弹簧初始压力和温度等气体非理想化因素的影响,为此引入一个表征气体非理想化特性的无量纲因子H进行修正。仿真计算结果表明,在低温高压的情况下,基于理想气体状态方程的空气弹簧刚度特性模型存在较大误差;

Three types of air spring stiffness characteristic models are established based on Van Der Waals Equation. It is known from theoretical analysis that the previous models can not reflect the influence of gas non-ideal factors such as van der Waals constant, initial pressure of air spring, temperature and so on. Therefore, a non-dimensional factor H which represents the characteristic of non-ideal gas was introduced to amend. The simulation results show that, under the condition of low temperature and high pressure, there is great error in the air spring stiffness model based on the state equation of ideal gas. The introduced factor H can improve the applicability of air spring stiffness model.