横风作用下载重汽车在复杂路段运行的安全模型

Operational security model of truck in complex sections under cross wind

为提高横风作用下载重汽车在复杂路段运行的安全性,通过风攻角0°和90°这2种不同工况下的风洞试验模拟强风作用对载重汽车运行安全的影响,建立了载重汽车气动力六分力坐标系,获得了作用于载重汽车的风作用六分力系数,利用空气动力学公式对作用于载重汽车的六分力进行了量化,对影响横风作用下复杂路段载重汽车运行安全的风险因素进行研究;在此基础上,对在横风作用下运行在弯道路段的载重汽车进行受力分析,利用Matlab仿真软件建立了载重汽车在弯道路段侧翻和侧滑的安全运行速度模型,提出了横风作用下复杂路段载重汽车的限速标准,并将限速标准应用于横风作用影响较大的弯道路段。研究结果表明:提出的限速标准减少了强横风弯道路段载重汽车交通事故的发生,为强横风地区复杂路段的限速方案提供了参考,对强风地区复杂路段载重汽车的运行安全起到了一定的保障作用。

In order to improve running safety of truck in complex road sections under cross-wind, the impact of wind acting on the truck was simulated through the wind tunnel test in two different conditions of wind attack angle 0° and 90°, and a six-component truck aerodynamic coordinate system was established. Besides, six-component coefficient of wind action acting on the truck was obtained, and six component acting on the truck was quantified by using aerodynamic formula. The action of cross wind affecting road truck operational safety complex risk factors was studied, on the basis, forces acting on truck under cross-wind were analyzed in the curve sections, and safe operation velocity model of truck rollover and sliding was established by using Matlab simulation software under strong wind. Besides, the standard of speed limit of truck in complex sections under cross-wind was prposed and was applied in the curve sections under strong cross- wind. The results show that the standard of speed limit of truck in curve sections under cross- wind reduces the traffic accidents, provides a reference for speed limit proposal for complex sections under cross-wind, and plays an important role in safeguarding truck running safety in complex sections under strong wind. 3 tabs, 8 figs, 16 refs.