Prediction Method of Ground Vibration Caused by High-Speed Railway Based on the Formula from the Federal Transportation Administration

基于美国联邦运输管理局公式的高速铁路地面振动预测方法

Authors: Ghosh Tanmay; Kanitkar Tejal; Srikanth R.

作者：戈什·坦迈；卡尼特卡尔·特哈尔；斯里坎特·R

Abstract: To predict the environmental vibration caused by high-speed railways, a prediction method combining actual measurement and simulation is proposed based on the vibration prediction formula proposed by Federal Transportation Administration (FTA). On a subgrade section of the Nanchang-Jiujiang Intercity Railway in China, the ground vibration acceleration level and the line source transfer mobility of the soil layer were measured using the field vibration test and the hammer test. Second, the force density function of the moving train is determined by applying the prediction formula inversely. In conjunction with the line source transfer mobility calculated by the finite element simulation, the ground vibration caused by the high-speed train operating in the subgrade section is finally predicted. The results indicate: This method’s prediction result is nearly identical to the variation law of the measured vibration acceleration level curve, and the vibration acceleration level of each center frequency in the frequency range above 5 Hz is essentially identical; the error between the result of the weighted vibration acceleration level and the measured value is only 1.1% at 10 m (71.84 dB and 72.64 dB, respectively). The predicted and measured results of the Z vibration level at 30 m are 66.02 dB and 68.94 dB, with an error of 4.23%. It can be seen that the prediction accuracy of this method is reasonably good. Environmental vibration and noise caused by high-speed railways has become a new environmental problem, with the rapid development of high-speed railways. Accurately predicting the environmental vibration caused by trains is crucial for effective railway vibration reduction and noise control. The combination of combining field test and numerical simulation is proposed based on the vibration prediction formula offers a method with high prediction accuracy and ease of implementation, which can enhance the prediction of the environmental vibration impact caused by high-speed railways or rail transit. In future research, the findings of this study have significant engineering application value for environmental assessment.

摘要： 为了预测高速铁路引起的环境振动，本文基于美国联邦运输管理局（FTA）提出的振动预测公式，提出了一种实测与仿真相结合的预测方法。在南昌至九江城际铁路某路基段，采用现场振动试验和锤击试验相结合的方法，测定了土层的地面振动加速度水平和线源传递导纳。其次，通过应用反向预测公式来确定运动的列车的力密度函数。结合有限元模拟计算的线源传递导纳，最终预测了高速列车在路基段运行时引起的地面振动。结果表明：该方法的预测结果与实测振动加速度水平曲线的变化规律基本一致，在5赫兹以上频率范围内各中心频率的振动加速度水平基本一致；加权振动加速度水平的结果与10米处的测量值之间的误差仅为1.1%（分别为71.84分贝和72.64分贝）。对30米处Z振动水平的预测和测量结果分别为66.02分贝和68.94分贝，误差为4.23%。可以看出，该方法的预测精度尚可。随着高铁的快速发展，其引起的环境振动和噪音已成为一个新的环境问题。准确预测列车引起的环境振动对于有效减少铁路振动和控制噪声至关重要。基于振动预测公式，将现场试验与数值模拟相结合，提供了一种预测精度高、易于实现的方法，可以增强对高铁或轨道交通引起的环境振动影响的预测。在今后的研究中，本研究成果对环境评估具有重要的工程应用价值。

Key words: High-speed railway; Ground vibration; Hammer test; Line source transfer mobility; Force density function; Prediction method

关键词：高速铁路；地面振动；锤击试验；线源传递导纳；力密度函数；预测方法

来源：https://ascelibrary.org/

发表时间：2023年9月1日

检索：程子馨

翻译：殷嘉怡

一审：褚梦迪

二审：彭莉

三审：罗玲娟

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