为提高医疗物资公路运输的安全性，采用Trucksim动力学仿真软件，建立厢式医疗运输车、道路、侧风的耦合模型。通过改变路面摩擦系数，分别模拟了晴天、雨天、雪天和结冰条件下的路面状况，改变侧风模型的极值模拟各类风速等级，改变货载质量模拟各类医疗物资，进行单移线常见工况闭环仿真试验，得到了车辆侧向位移和侧倾角的响应输出。结果表明：厢式医疗运输车的行驶稳定性与路面摩擦系数的变化呈正相关性，与货载质量、风速等级的变化呈负相关性；在雪天路面摩擦系数为0.28，车速为60km/h的单移线工况下，车辆侧向位移达到4.5m，车辆容易超出车道，引发碰撞危险；在高风速等级作用下，车辆发生侧翻的概率大大增加；货载质量的变化对车辆稳定性的影响整体较小。
In order to improve the safety of road transportation of medical materials, using the dynamics simulation software of Trucksim, the coupling model of van type medical transport vehicle, road and crosswind was established. By changing the friction coefficient of the road, the road conditions in sunny, rainy, snowy and frozen days were simulated. The extreme value of the crosswind model was changed to simulate all kinds of wind speed levels, and the cargo quality was changed to simulate all kinds of medical supplies. The closed-loop simulation test of the common working conditions of the single transfer line was carried out, and the response output of the lateral displacement and the roll angle of the vehicle were obtained. The results show that the driving stability of the van type medical transport vehicle is positively correlated with the change of the road friction coefficient, and negatively correlated with the change of the cargo quality and the wind speed grade; under the condition of single transfer line with the road friction coefficient of 0.28 and the vehicle speed of 60km/h in snowy days, the lateral displacement of the vehicle reaches 4.5m, the vehicle is easy to exceed the lane, causing the risk of collision; under the high wind speed level, the probability of vehicle rollover is greatly increased; the influence of the change of the cargo quality on the stability of the vehicle is small as a whole.
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