中文摘要：

为得到某新型支承块式轨道结构的振动特性,运用模型试验,研究了该新型支承块式轨道结构在落轴冲击作用下钢轨、支承块、道床及地面的振动特性,并进行了时域特性及频域特性分析。研究结果表明,钢轨的振动加速度远远大于支承块、道床及地面的振动加速度;振动由钢轨传递到地面的过程中,道床的振动加速度要比支承块及地面处的振动加速度大;线性计权下,钢轨、支承块、道床及地面的振动加速度级取值范围分别为115-160d B、98-126d B、100-123d B及95-121d B,钢轨、道床及地面的振动加速度级大体上随频率增大而增大;Z计权下,道床振动加速度级在3.15-80Hz范围内处于波动状态,地面振动加速度级在3.15-31.5Hz范围内大体上随频率增大而增大,在31.5-80Hz范围内随频率增大而减小。

英文摘要：

In order to obtain the vibration characteristics of a new type of supported block track structure,it analyzes a new supporting block track structure（ an elliptical supporting block track structure） under the impact of wheel load drop based on model test,describes the characteristic of some parts such as the rail,supporting blocks,track and ground,presents the characteristics in time domain and frequency domain. The results show that the vibration acceleration of rail vibration acceleration is far greater than the vibration of support block,track and ground; the vibration acceleration of the ballast bed is larger than that of the supporting block and the ground when the vibration transfers from the rail to the ground. Under linear weight,vibration acceleration level range of rail,support blocks,track and ground are respectively： 115 ~ 160 d B,98 ~ 126 d B,100 ~ 123 d B and 95 ~121d B; the vibration acceleration level of rail,track and ground generally increases with increasing frequency.Under Z weight,track vibration acceleration level fluctuates in the range of 3. 15 ~ 80Hz; the ground vibration acceleration level generally increases with increasing frequency in the range of 3. 15 ~ 31. 5Hz and decreases with the increasing frequency in the range of 31. 5 ~ 80 Hz.