【摘要】 由于橡胶减速带的高度相对于路面粗糙度大的多,当车辆快速经过时极易产生跳车现象。跳动的车辆对地面产生冲击作用,从而引起周边建筑物的较大振动。对于一般的载重汽车后轮承受重量比前轮大的多,跳车时后轮对地面的冲击力也将比前轮大的多。本文建立一种简化的跳车模型,在固定位置作用一个冲击力来模拟车辆跳车时车轮对地面的作用力,求解动力方程并求出车辆冲击荷载,然后通过计算半无限体在该作用力表面的振动情况来近似预测车辆跳车时引起的地面振动。最后选取一场地通过实测结果与理论计算分析进行对比。更多还原

【Abstract】 Because the rubber speed control humps are higher than the uplifts caused by the road roughness,vehicles easily jump when they run across the rubber speed control humps.And then jumping vehicles have huge impacts on the road surfaces.The actions cause the building vibrations when the vibrational forces transmitted to the building foundations.Commonly,back wheels of trucks are heavier than their fore wheels.So the impact forces of back wheels are larger than fore wheels.A simplified vehicle jumping model only considering single axle of back wheels is established.The impact forces acting on the fixed station are used to simulate the actions of back wheels on the road surface,and dynamic equations and the impact forces of vehicles are calculated.We can predict the vibrations caused by jumping vehicles through calculating the surface vibrations when the impact forces act on the semi-infinite body.Finally,a comparison with the practical test and theoretical result is studied.更多还原