不利线形匝道车辆行驶侧向稳定性仿真分析

Simulation and Analysis on Lateral Stability of Vehicles on Adverse Linear Ramp

摘要:

基于Trucksim的模拟场景搭建，研究车辆在苏州独墅湖南隧道NE匝道上行驶的车辆侧向行驶稳定性。构建车辆整体动力学模型、道路模型、驾驶人控制策略模型，分析装载质量、附着系数对弯道安全速度的影响。结果表明：为确保车辆在匝道（弯道）路段安全行驶，道路路面的附着系数不宜低于0.7，匝道（弯道）安全速度的阈值与车辆装载质量呈负相关。以期探究在最不利车辆工况下的行驶稳定及安全问题，对不利线形工况下的设计与分析提供参考。

Abstract:

Based on the simulation scenario of TruckSim， the lateral stability of vehicles driving on the NE ramp of Dushu Hunan Tunnel in Suzhou is studied. The overall vehicle dynamics model， road model and driver control strategy model are built to analyze the influence of load quality and adhesion coefficient on the safe speed of the curve. The results show that the adhesion coefficient of the pavement should not be lower than 0.7 in order to ensure the safe driving of vehicles on ramp （curve) sections. The threshold of on-ramp （curve) safe speed is negatively correlated with vehicle loading mass. In order to explore the driving stability and safety problems under the most unfavorable vehicle driving conditions， the reference is provided for the design and analysis under the unfavorable linear driving conditions.