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针对某型工程车辆的油气悬架系统,确定了含非线性刚度和阻尼的油气悬架和轮胎的数学模型,并根据虚位移原理推导了油气悬架恢复力和轮胎恢复力之间关系的解析表达式。结合工程实际,基于有限元动力学方法,采用连接单元来模拟非线性刚度和阻尼特性,建立了油气悬架和轮胎耦合的非线性悬架系统动力学模型,并通过施加正弦载荷、冲击载荷和阶跃载荷,揭示了油气悬架系统的特性。该方法为同类型悬架系统动力学建模提供了借鉴,结果为悬架系统和汽车系统动力学的研究提供了参考。
Aiming at the hydro-pneumatic suspension system of a certain type of engineering vehicle, the mathematical model of the hydro-pneumatic suspension and tire with nonlinear stiffness and damping is determined and the relationship between the restoring force of the hydro-pneumatic suspension and the restoring force of the tire is deduced based on the principle of virtual displacement expression. Based on the engineering practice, based on the finite element method, the connection element is used to simulate the nonlinear stiffness and damping characteristics. The dynamic model of the nonlinear suspension system coupled with the hydro-pneumatic suspension and the tire is established. By applying sinusoidal load, Step loading reveals the characteristics of the oil-gas suspension system. This method provides a reference for the dynamic modeling of the same kind of suspension system. The result provides a reference for the research of suspension system and vehicle system dynamics.