减速垄几何参数对车及路冲击性的影响

发布时间：2018-01-07 13:01

本文关键词：减速垄几何参数对车及路冲击性的影响　出处：《中国安全科学学报》2014年01期 　论文类型：期刊论文

【摘要】：为将用于低速场合的减速垄更合理地安装在干线公路上(高速场合),对现有的减速垄进行改进,重新设计横截面的形状,并较细致地分析和描述减速垄横截面几何参数与冲击力(车辆振动,对路面冲击力)之间的关系。用仿真方法,在计算机上借助多体动力学仿真软件ADAMS建立车辆动力学模型和减速垄模型,并对模型进行验证。通过大量的仿真试验,得到下述结论:目前街区常用的减速垄不能直接安装于公路;在公路设置减速垄时,其宽度应至少在600 mm以上,同时必须降低减速垄的高度;T形,多边形,圆顶形减速垄之间就冲击性(路面冲击力,警示力度)而言并不存在显著的差别;对于T形减速垄,通过降低坡面斜率所能起到的路面保护作用十分有限;减速垄下缘厚度只要在通常范围内,其数值对于冲击性无关紧要。
[Abstract]:In order to install the decelerating ridge used in the low speed situation more reasonably on the trunk highway (in the high speed situation, the existing deceleration ridge is improved, and the shape of cross section is redesigned. The relationship between geometric parameters of deceleration ridge cross section and impact force (vehicle vibration, impact force on road surface) is analyzed and described in detail. The simulation method is used. The vehicle dynamics model and deceleration ridge model are established with the help of multi-body dynamics simulation software ADAMS on the computer, and the model is verified. A large number of simulation experiments are carried out. The conclusions are as follows: at present, the commonly used deceleration ridges in blocks can not be directly installed on highways; The width of the deceleration ridge should be more than 600 mm when the highway is set up, and the height of the deceleration ridge must be reduced. There is no significant difference between the T-shaped, polygonal and dome deceleration ridges in terms of impact (road surface impact, warning strength); For T-shaped deceleration ridge, the pavement protection function by reducing slope slope is very limited. As long as the thickness of the lower edge of the deceleration ridge is in the normal range, its value is irrelevant to the impact.
【作者单位】：内蒙古大学交通学院;重庆交通大学交通运输学院;
【基金】：国家自然科学基金资助(51278514) 内蒙古大学高层次人才引进科研启动项目(125115) 内蒙古自治区高等学校科学研究项目(NJZC13030)
【分类号】：U491.5
【正文快照】： 0引言一些地区的公路管理部门在设置减速垄时,往往将用于低速场合的减速垄直接安装在干线公路上。公路上的车辆不像在拥挤的街道上那样容易受到前后车辆以及两侧环境的影响,车速往往很高,超过设计速度也是十分常见的,车辆减速后一般仍以40~50 km/h的速度驶过减速垄。车辆前轴

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