Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2019, Vol. 55 ›› Issue (5): 805-812.DOI: 10.13209/j.0479-8023.2019.076

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Comparative Analysis of Time-Frequency Characteristics of Seismic Signal Induced by High-Speed Train

BAO Qianzong1,2,†, XU Jie1,2, XU Mingrui1,2   

  1. 1. School of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054 2. The Joint Research Group of High-Speed Rail Seismology, Beijing 100029
  • Received:2019-08-04 Revised:2019-08-15 Online:2019-09-20 Published:2019-09-20
  • Contact: BAO Qianzong, E-mail: qzbao(at)chd.edu.cn

高铁地震信号时频特征对比分析

包乾宗1,2,†, 许杰1,2, 许明瑞1,2   

  1. 1. 长安大学地质工程与测绘学院, 西安 710054 2. 高铁地震学联合研究组, 北京 100029
  • 通讯作者: 包乾宗, E-mail: qzbao(at)chd.edu.cn
  • 基金资助:
    国家自然科学基金(41074089, 41774135)和中央高校基本科研业务费专项资金(310826172002)资助

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Abstract:

The time-frequency spectrum analysis of high-speed train (HST) seismic signals measured in Baoding, Hebei Province and Shenzhen, Guangdong Province is carried out by using synchrosqueezing wavelet transform. It is found that the seismic signals generated by HST passing through viaducts are more abundant in low-frequency information than those generated by running through tunnels and on the surface. Through the time-frequency spectrum characteristics of the HST seismic signal, the state of change of the runing speed of HST can be determined.

Key words: high-speed train seismology, time-frequency analysis, synchronous compression wavelet transform; equidistant spectral lines

摘要：

利用同步挤压小波变换方法, 对河北保定和广东深圳地区实测的高铁地震信号进行时频谱分析。结果表明, 高铁在经过高架桥时, 在其附近产生的地震信号中低频信息比通过隧道和接触地表运行产生的地震信号丰富。利用高铁地震信号的时频谱特性, 可以确定高铁运行速度的变化。

关键词: 高铁地震, 时频分析, 同步挤压小波变换, 分立谱

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