悬架减震器非线性特性对汽车拖车组合系统稳定性的影响
Effects of nonlinear characteristics of suspension dampers on stability of car-trailer combinations
摘要 为了研究汽车拖车组合系统中牵引车悬架减震器非线性引起的时变特性的谐波动态轴载对系统动态稳定性的影响,提出了一种带有双轴拖车系统的线性单轨模型.根据推导出的有效轴载量化动态轴载,并采用基于时频域分析的方法识别系统的时变参数.实验研究表明,此谐波效应具有时变性.设计了一种基于车辆横摆角速度的仿真方法来模拟道路实验中观测到的谐波效应,并通过仿真分析谐波幅值和相位对系统动态临界车速的灵敏度,初步验证了考虑悬架减震器非线性特性引起的谐波动态轴载对汽车拖车细合系统稳定性影响的理论分析.
Abstract:
To investigate effect on a time-varying harmonic dynamic axle load induced by the change of nonlinear characteristics on suspension dampers installed in the towing car on the dynamic stability of car-trailer combinations,a linear single-track model with a tandem-axle trailer was proposed and an effective axle load was used to quantify the harmonic dynamic axle load.A parameter identification method based on time-frequency analysis was applied in the process,too.Experimental study shows the harmonic effect has a time-varying phenomenon.A simulation method is designed for the purpose of a harmonic force generator to simulate the harmonic effect in road experiments.On this basis,the sensitivity analysis of the influence on the harmonic amplitude or the phase on the system dynamic stability is performed by the simulation.It is preliminarily proved that the proposed theoretical analysis of the harmonic dynamic axle load on the stability effects of car-trailer combinations is reasonable and acceptable.
Author: Zhang Ning Ju Anjian Li Pengcheng Yin Guodong
作者单位: 东南大学机械工程学院,南京,211189
年,卷(期): 2017, 47(2)
分类号: U461.61
在线出版日期: 2017年5月16日
基金项目: 国家自然科学基金青年基金资助项目,江苏省自然科学基金青年基金资助项目