车辆通过减速带引起地面振动的机理分析

Vibration Analysis of the Ground Generated by the Vehicles Crossing Speed Control Humps

虽然车辆通过减速带时引起的地面振动引起了一些人的注意,但研究内容集中在测量几种车辆通过不同形式的减速带引起的地面振动量以及对这些结果的分析比较。研究了两个自由度的车辆模型通过减速带时,振动的产生过程以及机理并建立计算模型。作用过程分为3个阶段:轮胎对减速带的冲击,车辆在减速带上行驶时候的竖向振动,以及车辆落地时对地面的冲击作用。通过建立计算模型和实际测量,研究了车辆轮胎对减速带的冲击力的大小和作用时间,以及车辆在减速带上行驶时候,对减速带作用的简谐力的时域过程,和车辆落地时候对于地面的冲击力。当车辆速度较大时候,会产生跳车现象。该文计算了这一临界速度。最终,综合分析这些对地面的作用力,计算出地面振动的时域和频域情况,并且与实际测量的振动量比较。

Though the vibration of the ground has been paid attention by some scholars,the main concern is measurement of the level of vibration of the ground generated by different kinds of vehicles crossing speed control humps with varied shapes.This paper studies the process and mechanics of the generation of the vibration using vehicle model with two freedoms.The process is divided into three parts： the shock to the speed control hump generated by the tires,the vertical vibration when vehicle crossing speed control humps,the shock to the ground when the vehicle falls down on the ground.By modeling and measurement,this paper studies the process.When the vehicles cross speed control humps with high speeds,the vehicle-hop would happen.The criteria speed is determined in this paper.