Dynamic Behaviour of Truck at Long and Steep Longitudinal Slope Section
To study the reasonable grade and grade length for the highway in mountain area, a dynamic truck model is set up which is suitable to the character of steep and long longitudinal slope.The tire and suspension can bear forces not only in the vertical direction but also in the horizontal direction along slope.Considering the torque characteristics of the engine and the stall conversion relationship of the power transmission system, the speed variation during the truck climbing process is studied.The influences of axle load,entrance speed, grade and grade length on the truck speed are analyzed.It is found that the changes of the truck driving torque is quite complex during the climbing process,but the speed is always decline.If the grade length is enough long, there is always a steady speed.With the increase of grade and axle load, the decline of the speed is faster,and the steady speed is lower.The entrance speed has no influence on the steady speed, but with the increase of the entrance speed, the steady length is longer.Based on the above analysis, the control indicators of grade and grade length are put forward, and then a function model on the relationship between grade and grade length is built up.The result could provide reference for route design of highway in mountain area.
long and steep longitudinal slope heavy truck grade grade length vehicle speed
Liu Yaosong Duan Xiaofeng Wang Xian Dong Zhonghong
Key Laboratory of Road Construction Technology and Equipment, Ministry of Education, Changan University, Xian 710064, China
国际会议
西安
英文
392-396
2015-09-18（万方平台首次上网日期，不代表论文的发表时间）