【摘要】 针对现有理论方法不能预测远距离地面振动的不足,对《动力机器基础设计规范》的地面振动衰减公式的参数进行适当调整,使其可用于预测铁路产生的地面振动衰减.计算了距铁路轨道中心50,100,200,400,500和1 000 m等不同测点处的地面振动,并与实测资料作了对比分析;首次预测并对比分析了列车运行引起的1 000 m远距离处地面振动传播与衰减.分析结果表明:调整后的《动力机器基础设计规范》公式可以预测铁路引起的远距离地面振动;由于实测加速度对比资料较少,因此,目前该公式仅推荐计算铁路的地面振动位移幅值和速度幅值.更多还原

【Abstract】 The existing theory can not predict the long-range responses of the ground vibration,so an empirical formula is presented by adjusting the parameters in the attenuation formula in order to predict the ground vibration in the far field generated by a moving train.The formula is used to predict the ground vibrations at the distances of 50,100,200,400,500,and 1 000 m to the track center in the first time.The calculated ground vibration displacements are also compared with the measured ones.The results indicated that the formula can well predicted the propagation and attenuation of ground vibration responses generated by the moving trains.However,due to the lack of the measured vibration acceleration,the formula is only recommended to predict the vibration velocity and displacement of ground.更多还原