摘要
为了优化汽车系统,避免振动响应过大引起的汽车垂向振动环境恶化对汽车行驶舒适性和安全性的不利影响,基于能量原理和拉格朗日方程方法,建立了汽车垂向振动系统的非线性动力学方程,扩展了分析力学理论在汽车非线性建模方面的应用.利用动态灵敏度技术,提出了汽车垂向振动响应对车体、悬架和轮胎参数的灵敏度非线性时域分析模型,通过数值仿真,分析了系统的惯性、阻尼和线性及非线性刚度参数变化对汽车垂向振动响应的影响规律.研究结果表明,汽车垂向振动响应对系统惯性和阻尼参数的敏感程度明显比刚度参数大,簧载质量变化对汽车垂向振动响应的影响最大,轮胎非线性刚度变化对汽车垂向振动响应的影响最小.
In order to optimize the vehicle system and avoid the negative influence of vertical vibration environment deterioration on the ride comfort and safety caused by excessive vibration response,the energy principle and Lagrange equation method were employed to establish the nonlinear dynamic equation of the vertical vibration in vehicle system,and the application of analytical mechanics theory on the vehicle nonlinear modeling was extended.A nonlinear time domain model for analyzing the sensitivity of the vertical response in vehicle system(TVRIVS)with respect to parameters of the vehicle body,suspension and tire was proposed based on the dynamic sensitivity technique.The influence of the variations of inertial parameters,drag parameters,linear and nonlinear stiffness parameters on TVRIVS were analysed by using the numercal simulation.The results show the sensitive extents of TVRIVS with respect to inertial and the drag parameters are sharply greater than the stiffness parameters,the effect of sprung mass variation on TVRIVS is the maximum,and the effect of nonlinear stiffness variation of the tire on TVRIVS is the minimum.This work provides references to the reduction of the vertical vibration and to the further study of the dynamic characteristics in vehicle system.
作者
唐冶
潘道远
时培成
TANG Ye;PAN Daoyuan;Shi Peicheng(School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China)
出处
《宜宾学院学报》
2018年第12期41-45,69,共6页
Journal of Yibin University
基金
国家自然科学基金项目"轮毂驱动电动汽车垂向机-电耦合振动机理及抑制方法研究"(51575001)
安徽省高校自然科学研究项目"汽车悬架系统非线性粘性阻尼低频被动减振机理研究"(TSKJ2016B18
KJ2017A106)
关键词
汽车
非线性垂向振动
拉格朗日方程
时域响应
灵敏度
vehicle
nonlinear vertical vibration
Lagrange equation
time domain response
sensitivity
