Train velocity has little influence on the dynamic stress and dynamic deformation of subgrade bed, but has obvious influence on vibrating velocity and vibrating acceleration.
列车运行速度对振动速度、振动加速度的影响比对动应力、动变形的影响更显著。
Using theory of vibration wave propagation, the concept of the attenuation coefficient of vibrating acceleration is drawn, and the test results of attenuation coefficient are analyzed.
应用振动波传播理论引出加速度衰减系数的概念，并对加速度衰减系数的试验结果进行了分析。
The vibrating acceleration on the ground is strongest over the tunnel, and weakens gradually in the lateral directions. It is amplified at a certain distance away from tunnel central line.
地表振动加速度在隧道正上方强度最大，往两侧逐渐减弱，而在离开隧道轴线一定距离部位出现了一加强区。
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