基于TruckSim的装载工况影响下弯道安全车速阈值

为研究装载工况和路面条件对弯道路段安全车速阈值的影响，运用TruckSim仿真软件建立大型车辆整车动力学模型、道路场景模型和驾驶人控制策略模型，从装载质量和道路附着系数2个方面分别设计实验进行仿真，分析车辆在弯道路段发生侧滑、侧翻的影响因素及其影响程度。以陕西省某高速公路一弯道路段为例，研究了车辆在双因素影响下，通过弯道的安全车速阈值。结果表明：随着装载质量的增加，弯道安全车速阈值减小，安全车速阈值与装载质量之间为幂函数关系；道路附着系数在0.1~0.6范围内时，随着弯道路面附着系数的增加，弯道安全车速阈值减小，且二者为指数函数关系；当道路附着系数在0.6~1.1范围内时，随着弯道路面附着系数的增加，弯道安全车速阈值变化趋于平缓。根据模型仿真分析结果，针对超载超限问题，进一步对交通管理部门、装载人员和驾驶人提出相应的安全建议，旨在提高公路弯道行车主动安全性，也为公路安全运营研究提供理论及技术支持。

Safe driving speed threshold on curve section of road under different loading conditions based on TruckSim

In order to investigate the influence of loading conditions and road conditions on safe driving speed threshold on curve section of road,oversize vehicle dynamics model,road scene model and driver con-trol model were established by using TruckSim software.Simulation tests were conducted in terms of the load-ing quality and road adhesion coefficient,and the contributory factors to vehicle rollover and sideslip on curve section of road and the degree of influence were analyzed.Finally,one curve section on an expressway in Shaanxi Province was taken as an example,and the safe driving speed threshold influenced by two factors was studied.The results indicate that the safe driving speed threshold on curve section decreases with increasing loading quality of freight,and it shows a power function relationship between safe driving speed threshold and loading quality;safe driving speed threshold on the curve section presents a downward trend while the road ad-hesion coefficient increases from 0.1 to 0.6,and the safe driving speed threshold and road adhesion coefficient show an exponential function relationship;safe driving speed threshold on the curve section remains stable while the road adhesion coefficient increases from 0.6 to 1 .1 .In accordance with the model simulation analy-sis results and aimed at overload and over-limited problems,this paper gives some security advice to traffic management departments,stevedores as well as drivers,which can improve the active safety for driving on the curve section of road and provide theoretical and technical support for road safety operation research.