| 高铁地震信号时频特征对比分析 |
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| 引用本文： | 包乾宗,许杰,许明瑞.高铁地震信号时频特征对比分析[J].北京大学学报(自然科学版),2019,55(5):805-812. |
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| 作者姓名： | 包乾宗 许杰 许明瑞 |
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| 作者单位： | 长安大学地质工程与测绘学院, 西安 710054;高铁地震学联合研究组, 北京 100029 |
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| 基金项目： | 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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| 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。
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| 关 键 词： | 高铁地震 时频分析 同步挤压小波变换 分立谱 |
| 收稿时间： | 2019-08-04 |
Comparative Analysis of Time-Frequency Characteristics of SeismicSignal Induced by High-Speed Train |
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| BAO Qianzong,XU Jie,XU Mingrui.Comparative Analysis of Time-Frequency Characteristics of SeismicSignal Induced by High-Speed Train[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2019,55(5):805-812. |
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| Authors: | BAO Qianzong XU Jie XU Mingrui |
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| Institution: | 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 |
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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. Itis found that the seismic signals generated by HST passing through viaducts are more abundant in low-frequencyinformation than those generated by running through tunnels and on the surface. Through the time-frequency spectrumcharacteristics of the HST seismic signal, the state of change of the runing speed of HST can be determined. |
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| Keywords: | high-speed train seismology time-frequency analysis synchronous compression wavelet transform equidistant spectral lines
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