力学与实践 ›› 2019, Vol. 41 ›› Issue (4): 393-397.DOI: 10.6052/1000-0879-19-073

• 应用研究 • 上一篇    下一篇

大货车转弯侧翻的影响因素分析

杨雨杰*, 邱信明,1)()   

  1. * 清华大学汽车工程系,北京 100084
    清华大学航天航空学院,北京 100084
  • 收稿日期:2019-02-25 出版日期:2019-08-27 发布日期:2019-08-26
  • 通讯作者: 邱信明
  • 作者简介:1) E-mail: qxm@tsinghua.edu.cn

THE CONDITIONS AND INFLUENCING FACTORS OF TRUCKS' ROLL-OVER DURING TURNING

YANG Yujie*, QIU Xinming,1)()   

  1. * Department of Automotive Engineering, Tsinghua University, Beijing 100084, China
    School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
  • Received:2019-02-25 Online:2019-08-27 Published:2019-08-26
  • Contact: QIU Xinming

摘要:

因重心高、载重大,大货车在弯道行驶时,如果速度过高,很容易发生侧翻。针对货车转弯侧翻这一物理现象,本文利用动静法建立了其动力学模型。引入了描述侧翻的两个物理量——倾斜临界速度和侧翻临界速度,在给定参数下对车的受力和运动进行了数值计算,并分析了车重、车的质心高度和转弯半径等因素对转弯侧翻的影响。并对如何避免大货车转弯侧翻,给出了定性的驾驶指导建议。

关键词: 货车, 转弯, 侧翻, 临界速度

Abstract:

When driving on a bend, due to the high gravity center and the heavy load, large trucks or lorries are easy to roll-over if their speed is high. This paper proposes a simplified theoretical model of the roll-over process of a truck during its turning, based on the dynamics analysis. Two critical velocities are defined to evaluate the state of the truck: the tilting critical velocity and the roll-over critical velocity. For a truck of given parameters, the main factors that affect the roll-over process are analyzed, including the weight of the truck, the height of the gravity center, and the turning radius of the road. Finally, some qualitative driving suggestions are given about how to avoid roll-over of large trucks.

Key words: truck, turning, rollover, critical velocity

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