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以多体动力学理论和随机振动理论为基础,运用机械系统动力学仿真软件Adams/Car模块,建立了工程车辆前悬架虚拟样机模型。根据路面不平度垂直位移功率谱密度,采用数值模拟的方法得到不同等级路面激励的数学模型,并输入到前悬架系统模型中进行随机振动仿真。仿真结果对工程车辆前悬架结构的参数设计具有指导意义。
Based on the theory of multi-body dynamics and stochastic vibration theory, a virtual prototyping model of engineering vehicle front suspension is established by using the mechanical system dynamics simulation software Adams / Car module. According to the vertical displacement power spectral density of road roughness, mathematical models of different levels of road surface excitation are obtained by numerical simulation and input to the front suspension system model for random vibration simulation. The simulation results are of guiding significance to the parameter design of the front suspension structure of engineering vehicles.