摘要
为提高车辆在弯道路段的行驶安全性,在分析弯道路段事故形态的基础上,提出弯道行驶安全性评价指标。同时,从车辆侧向稳定性分析角度,建立道路圆曲线半径与弯道路段行驶安全性的定量关系。通过TruckSim与Simulink的联合仿真实验,利用3种典型的弯道行驶工况,对现行规范中规定的标准弯道的行驶安全性进行评价。结果表明:道路圆曲线半径与车辆侧向稳定性呈正相关,车速与其呈负相关。在给定实验工况下,车速为120km/h,圆曲线半径为500m时,侧向加速度超过0.4g,横向载荷转移率达到0.7,车辆极易发生侧滑/侧翻;而当车速为40km/h,圆曲线半径低于60m时,车辆动态响应的幅度虽有所增加,但车辆并不会发生侧滑与侧翻现象。
In order to improve the safety of vehicle driving on curved roads, this paper studies the driving safety on curves, and analyzes the features of curved road safety, and quantifies the relationship between road curve radius and safe- ty based on the principle of vehicle lateral stability. A vehicle simulation model combining TruckSim and Simulink is de- veloped to evaluate the safety of standard curves of the current specifications by using three typical curve driving condi- tions. The simulation results show that curve radius is positively correlated with vehicle lateral stability while vehicle speed is negatively correlated with the lateral stability. When a vehicle reaches the speed of 120 km/h and curve radius is below 500m, the lateral acceleration exceeds 0.4g and lateral-load transfer ratio reaches 0.7. There are some safety risks so that the vehicle has not passed the curve with sideslip/rollover. When a vehicle reaches the speed of 40 km/h and curve radius is below 60m, the range of vehicle dynamic response increases slightly; however, the vehicle is still in a stable state without sideslip/rollover.
出处
《交通信息与安全》
2014年第6期95-100,共6页
Journal of Transport Information and Safety
基金
国家自然科学基金项目(批准号:51105286)
中央高校基本科研业务费专项资金项目(批准号:2014-IV-137)
同济大学道路与交通工程教育部重点实验室开放基金项目(批准号:K201301)
道路交通安全公安部重点实验室开放课题基金项目(批准号:2014ZDSYSKFKT09)资助
关键词
弯道路段
行驶安全评价
侧向稳定性
侧翻
侧滑
curve segments
road safety evaluation
lateral stability
rollover
sideslip
