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research-article

Multiple Limit Cycles Shimmy of the Dual-Front Axle Steering Heavy Truck Based on Bisectional Road

[+] Author and Article Information
Daogao Wei

School of Automotive and Transportation Engineering, Hefei University of Technology, 193, Tunxi Rd, Hefei 230009, Anhui(Province), China
weidaogao@hfut.edu.cn

Yingjie Zhu

School of Automotive and Transportation Engineering, Hefei University of Technology, 193, Tunxi Rd, Hefei 230009, Anhui(Province), China
zhuyingjie@mail.hfut.edu.cn

Tong Jiang

Zhejiang Zotye Automobile Manufacturing Co., Ltd Hangzhou Branch, 509, Wenjin Rd, Hangzhou 310016, Zhejiang(Province), China
1109771449@qq.com

Andong Yin

School of Automotive and Transportation Engineering, Hefei University of Technology, 193, Tunxi Rd, Hefei 230009, Anhui(Province), China
yin_ad@163.com

wenhao zhai

School of Automotive and Transportation Engineering, Hefei University of Technology, 193, Tunxi Rd, Hefei 230009, Anhui(Province), China
1114538983@qq.com

1Corresponding author.

ASME doi:10.1115/1.4042294 History: Received May 03, 2018; Revised December 03, 2018

Abstract

The self-excited shimmy problem does great harm to vehicles and is difficult to solve, especially the multi-limit cycle shimmy. Moreover, the dynamic behaviour of the multi-limit cycle shimmy of vehicles based on bisectional road is more complex. Self-excited shimmy practically appears in the trucks of cooperative factories during utilization. Thus, we take the heavy truck of a cooperative factory as the prototype and establish the 12-degree of freedom (DOF) full vehicle dynamic model of a vehicle-road coupling shimmy system, considering the road adhesion coefficient and the dry friction between the suspension and the steering system. On the basis of the dynamic model, the Hopf bifurcation theory is used to qualitatively analyse the existence of the limit cycle for the vehicle shimmy system, and the multi-limit cycle shimmy phenomenon is successfully reproduced using a numerical method. Moreover, the effect of the road adhesion coefficient on the multi-limit cycle shimmy characteristic is studied. Results show that the speed interval and amplitude of the multi-limit cylce shimmy decrease with the adhesion coefficient; when the coefficient is reduced to a certain extent, the multi-limit cycle shimmy phenomenon disappears. In addition, the adhesion coefficient of the second bridge has a stronger effect on the shimmy characteristic than that of the first bridge.

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