基于Trucksim的弯道安全车速模型研究  

Research of safety speeds model on curve road by using Trucksim

作　　者：邵金菊[1] 张洪加 谭德荣[1] 于洋[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《广西大学学报（自然科学版）》2017年第3期961-969,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51508315);山东省自然科学基金项目(ZR2016EL19)

摘　　要：为提高车辆弯道行驶的安全性,针对汽车弯道行驶中侧滑、侧翻等侧向失稳问题,选用某型商用车为研究对象,考虑车辆悬架的动刚度特性和轮胎的非线性特性等,通过Trucksim软件建立了整车动力学模型,在平直路面上进行了不同弯道半径、不同附着系数与通过车速的交互仿真试验,然后在曲面函数拟合的基础上结合仿真实验数据建立了安全车速与附着系数、弯道半径的数学模型。通过Matlab仿真将本文模型与现有的弯道安全车速计算模型进行对比分析,该模型得到的弯道安全车速值在现有模型的计算值之间,同时在当路面附着系数在上升到某一定值后,通过模型计算出的安全车速值还呈现出车速峰值现象,反映出了通过弯道时的侧翻现象;最后,采用Trucksim软件对转弯半径为250 m、附着系数0.7的弯道仿真,使得出的安全车速值与该模型得到的安全车速值进行对比,本文模型将计算误差从传统计算模型的16%降低到了1.4%,提高了计算精度。该研究为车辆转弯时的侧翻、侧滑评价以及车辆转向行驶的主动安全控制提供了参考。In order to improve the vehicle driving safety in and to avoid vehicle lateral unstable incidents in curves,such as rollover,sideslip,the vehicle dynamic model of a truck is built by using Trucksim and considering the nonlinear characteristics of tire and dynamic stiffness of suspension.Then,the orthogonal simulation experiment of different driving speeds and radius and adhesion coefficient is carried out on the flat roads. Finally,the mathematical response surface model of safety speed to curve radius is established. Through Matlab software,the value of vehicle safety speed among the existing calculation models during turning is analyzed and compared. The results show that safety speed of improved model always fall in between the calculated values of existing models.When road adhesion coefficient rises to a certain range,safety speed of improved model has a unique peak phenomenon,which can reflect rollover accident occurred at high speed in curves. Finally,software Trucksimis used to simulate curved roads of turning radius 250 m and adhesion coefficient0. 7 to compare with the safety speed value obtained in this paper. The mathematical model is reduced to 1. 4% from the traditional calculation error of 16%. The calculation precision is improved. The result of this study is worth to reference for the stability evaluation and the active safety control of the vehicle under the condition of extreme turn and sideslip.

关 键 词：交通工程 车速计算模型 响应面 弯道 侧翻 侧滑 

分 类 号：U461[机械工程—车辆工程]