摘要
车速的合理选择,是影响弯道行车安全的关键。为此,针对车辆在弯道行驶过程中因超速导致的侧滑、侧翻等侧向失稳事故,通过建立车辆转向行驶动力学模型,结合道路环境信息,在分析车辆转向时载荷横向偏移、悬架变形等基础之上,对传统模型进行改进,建立精度更高的弯道安全车速计算模型。并采用车辆动力学仿真软件CarSim和TruckSim进行不同工况下的仿真试验验证。运用正交试验方法对试验结果进行极差和方差分析,获取弯道安全车速对7种主要影响因素的敏感度。结果表明,该模型所得的安全车速值,与车辆侧向失稳时的临界车速值之间的平均误差为1.55%;相比于其他因素,弯道半径和路面附着系数对安全车速的影响最为显著;当路面附着系数达到特定值时,模型考虑了车辆的侧翻危险,使其计算得到的弯道安全车速呈现饱和现象。
Appropriate speed on curve segments is important for improving driving safety.Accidents relate to lateral instability due to speeding on curve segments are analyzed,including rollover and sideslip.A dynamic model of vehicle cornering is developed.Combined with road environment information,lateral load transfer,and distortion of suspension system during vehicle cornering are analyzed.The traditional model is improved to calculate safe speed on curve segments with higher precision.The model is verified by conducting simulations under different traffic conditions in CarSim and TruckSim.An orthogonal method with range and variance analysis is conducted to analyze influences of seven factors on safe speeds.The results show that the average error between safe speed and critical stability speed is 1.55%.Compared with other factors,effects of radius of curve and surface adhesion coefficient of road are more significant.When surface adhesion coefficient of road increases after a certain value,the safe speed will saturate,indicates that the model considers rollover risks.
作者
杨俊儒
褚端峰
王维锋
万剑
邓泽健
吴超仲
YANG Junru;CHU Duanfeng;WANG Weifeng;WAN Jian;DENG Zejian;WU Chaozhong(Intelligent Transport Systems Research Center,Wuhan University of Technology,Wuhan 430063,China;Engineering Research Center for Transportation Safety of Ministry of Education,Wuhan University of technology,Wuhan 430063,China;Central Design Group Co.,Ltd.,Nanjing 210000,China;Research and Development Center on ITS Technology and Equipment,Nanjing 210000,China)
出处
《交通信息与安全》
CSCD
北大核心
2018年第6期1-8,共8页
Journal of Transport Information and Safety
基金
国家自然科学基金项目(51675390
U1764262)资助
关键词
汽车工程
弯道安全车速
车路耦合分析
敏感度分析
侧翻
侧滑
automotive engineering
safe speed on curve segments
vehicle-road coupling effect analysis
sensitivity analysis
rollover
sideslip
