具有新型牵引式后悬挂系统的车辆平顺性分析和仿真试验  

Ride-comfort analysis and simulation test of a vehicle with a new traction rear-suspension system

作　　者：杨兰福 田冲 刘鹏 任明明 YANG Lan-fu;TIAN Chong;LIU Peng;REN Ming-ming(School of Mechanical and Electrical Engineering,Tianjin Modern Vocational Technology College,Tianjin 300350;School of Mechanical Engineering,Tianjin University,Tianjin 300354;Jinxi Axle Co.,Ltd.,Taiyuan 030027)

机构地区：[1]天津现代职业技术学院机电工程学院,天津300350 [2]天津大学机械工程学院,天津300354 [3]晋西车轴股份有限公司,山西太原030027

出　　处：《机械设计》2020年第9期84-93,共10页Journal of Machine Design

摘　　要：针对一种新型牵引式后悬架系统,在考虑非线性弹簧与非线性阻尼力的基础上建立了7自由度整车悬架系统动力学模型。对改进前后两种结构从车身加速度、悬架动挠度和轮胎动载荷3方面进行了对比和平顺性分析。在理论分析的基础上,建立了整车仿真模型并进行了仿真试验研究。研究结果表明,新型牵引式后悬挂系统与原结构相比,车身加速度与悬架动挠度变小,汽车平顺性提高,验证了新结构的合理性。另外研究了悬架刚度与悬架阻尼对汽车平顺性的影响。通过分析发现:车身加速度受悬架刚度和阻尼影响明显,随着刚度和阻尼的增加而逐渐增加,汽车平顺性变差;悬架动挠度基本不受悬架刚度影响,但悬架动挠度随着阻尼的增加而降低;轮胎动载荷随着悬架刚度阻尼的增加而逐渐降低,汽车安全性增加。In this article,for a new traction rear-suspension system,a 7-DOF dynamic model of the vehicle’s suspension system is set up,with the nonlinear spring and the nonlinear damping force taken into account.The contrast and ride-comfort analysis is conducted on the improved structures from the perspectives of the acceleration of the vehicle body,the suspension deflection and the tire dynamic load.Based on the theoretical analysis,the vehicle’s simulation model is worked out and the simulation experiment is carried out.The results show that compared with the original structure,the new rear-suspension system enjoys a lower standard of body acceleration and suspension dynamic deflection,and the vehicle’s ride comfort has improved.In addition,the analysis is conducted on the influence of suspension stiffness and damping on ride comfort.It’s found that body acceleration is affected by the above-mentioned factors obviously.With the ever-growing stiffness and damping,body acceleration increases,and the vehicle’s ride comfort reduces.Basically,suspension dynamic deflection is not affected by stiffness,but it reduces with the increase of damping.With the increase of stiffness and damping,the tire’s dynamic load decreases,and the vehicle ensures a higher standard of safety.

关 键 词：悬架系统 非线性动力学 平顺性仿真 

分 类 号：TH132[机械工程—机械制造及自动化]