Abstract：For metro train-induced environmental vibration problems, a new prediction method of measured deep-hole excitation transfer function is proposed. Firstly, a vehicle-track coupling analysis model with high accuracy is applied to solve the input forces sequence of vibration source. Secondly, the in-site deep-hole excitation measurement is done to acquire the soil vibration transfer function series. Thirdly, a finite element model is used to get the tunnel structure correction function series. Then, the three parts above are superimposed in frequency domain to obtain the ground vibration response caused by the metro operation. In order to verify the prediction method, a new deep-hole excitation equipment is developed. And the soil transfer function is obtained by the impulse excitation tested inside the 15 meter excitation hole. Further, the proposed method is used to predict metro train-induced environmental vibration. The comparison of the predicted results and the in-situ measured data shows that: the time-domain vibration peaks are both 0.08m/s2; the main frequencies of vibration are both around 40Hz to 70Hz; the magnitudes and change regulations of the 1/3 octave band spectrums and Z vibration levels are also similar. It shows that this prediction method has high accuracy in metro environmental vibration prediction.
刘维宁 陈嘉梁 吴宗臻 王文斌 . 地铁列车振动环境影响的深孔激振实测传递函数预测方法[J]. 土木工程学报, 2017, 50(9): 82-89.
Liu Weining Chen Jialiang Wu Zongzhen Wang Wenbin . Prediction method of measured deep-hole excitation transfer function for environmental influence of metro train-induced vibration. 土木工程学报, 2017, 50(9): 82-89.
