非线性耦合油气悬架系统动力学建模与仿真研究  

Dynamic modeling and simulation study of nonlinear coupled hydro-pneumatic suspension system

作　　者：朱孙科[1] 任杰[1] 马大为[1] 朱忠领[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械设计》2010年第9期43-47,共5页Journal of Machine Design

摘　　要：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。Based on the hydro-pneumatic suspension system of certain engineering vehicle,the mathematic models of hydro-pneumatic suspension and tire containing nonlinear stiffness and damping were determined.Based on the virtual displacement principle,analytical expression of the relationship between restoring force of hydro-pneumatic suspension and that of tire was derived.By combining with actual condition of the engineering,based on FEM dynamics method and by using the connecting units to simulate the nonlinear stiffness and damping characteristics,a nonlinear suspension system dynamic model of hydro-pneumatic suspension coupled with tire was established.The hydro-pneumatic suspension system characteristics were revealed by applying sinusoidal load,impact load and step load.This method provides reference for similar suspension system dynamic modeling and its result can be used to suspension and vehicle system dynamics study.

关 键 词：油气悬架系统 动力学模型 非线性 数值仿真 

分 类 号：TH113[机械工程—机械设计及理论]