长大纵坡路段重型车辆爬坡速度

发布时间：2018-05-26 23:07

本文选题：道路工程 + 长大纵坡　；参考：《长安大学学报(自然科学版)》2014年03期

【摘要】：为了确定合理的坡度和坡长,建立了适宜于长大纵坡路段特点的重型车辆动力学模型。模型中的轮胎和悬架既能够承受垂向荷载作用,也可以承受沿坡道方向的水平荷载作用;利用发动机的转矩特性和动力传递系统的挡位转换关系,研究了重型车辆爬坡过程中的速度变化规律,分析了轴载、入坡速度、坡度和坡长等因素对车辆爬坡速度的影响。研究结果表明:爬坡过程中,车辆驱动力矩变化复杂,而车辆速度呈单调下降状态;当坡长足够长时,总存在某一稳定速度,坡度越大、轴重越高,车速下降越快,稳定速度就越小;入坡速度对稳定速度没有影响,但入坡速度越高,稳定坡长越大。在分析爬坡速度影响规律基础上,提出了坡度和坡长设计控制指标,建立了合理坡度与坡长的函数模型,可供山区公路路线设计参考。
[Abstract]:In order to determine the reasonable slope and length of slope, a dynamic model of heavy vehicle is established, which is suitable for the characteristics of long longitudinal slope section. The tire and suspension in the model can withstand both vertical load and horizontal load along the ramp. In this paper, the law of speed variation in the process of heavy vehicle climbing is studied, and the influence of axle load, entry speed, slope degree and slope length on the climbing speed of the vehicle is analyzed. The results show that the change of driving torque is complex and the vehicle speed decreases monotonously during slope climbing. When the slope is long enough, there is always a steady speed. The higher the slope is, the higher the axle load is, and the faster the speed decreases. The smaller the steady velocity is, the larger the slope length is, but the higher the entry velocity is, the less the stability velocity is. On the basis of analyzing the influence law of climbing speed, the design control index of slope and slope length is put forward, and the function model of rational slope and slope length is established, which can be used as a reference for the design of mountain highway route.
【作者单位】：长安大学道路施工与装备教育部重点实验室;江苏华通动力重工有限公司;
【基金】：国家自然科学基金项目(51008030) 中央高校基本科研业务费专项资金项目(CHD2011JC100,CHD2011ZD001)
【分类号】：U412.3

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