Validation of the Virtual Gather Generation Method from Synthetic Data for High-Speed Rail Seismic Source

doi:10.13209/j.0479-8023.2022.047

Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2022, Vol. 58 ›› Issue (5): 820-828.DOI: 10.13209/j.0479-8023.2022.047

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Validation of the Virtual Gather Generation Method from Synthetic Data for High-Speed Rail Seismic Source

YIN Changyang¹, SHI Yongxiang¹, WU Han¹, NING Jieyuan^1,2,†

1. School of Earth and Space Sciences, Peking University, Beijing 100871 2. Hebei Hongshan National Geophysical Observation and Research Station, Xingtai 054000

Received:2021-06-01 Revised:2022-05-22 Online:2022-09-20 Published:2022-09-20
Contact: NING Jieyuan, E-mail: njy(at)pku.edu.cn

基于合成数据对高铁震源虚拟道集生成方法的验证

殷常阳¹, 石永祥¹, 伍晗¹, 宁杰远^1,2,†

1. 北京大学地球与空间科学学院, 北京 100871 2. 河北红山地球物理国家野外科学观测研究站, 邢台 054000

通讯作者: 宁杰远, E-mail: njy(at)pku.edu.cn
基金资助:
河北省地震科技星火计划(DZ20200827054)和国家自然科学基金(41874071)资助

Abstract

Abstract:

Based on the principle of superposition method which can eliminate the crosstalk noise of the high-speed rail seismic wavefield recorded by the stations and generate virtual gathers, the operation ways of the superposition method are given and the method is verified on the synthetic high-speed rail data. The precise source time function of the high-speed rail is obtained by establishing the vibration equation of the high-speed rail viaduct, and the forward modeling of the high-speed rail wavefield in layered medium is calculated by using the finite element method and time-shift superposition of forward modeling of the high-speed rail wavefield with different speeds is carried out. The virtual gathers are obtained, which verifies the correctness of the stacking method.

Key words: high-speed rail, interference field, source time function, virtual gather

摘要：

根据稳相点分析的叠加方法原理, 提出一种波形叠加方法, 消除台站记录中高铁波场的串扰噪声, 生成虚拟道集, 并用合成的高铁数据进行验证。通过建立高铁桥梁振动方程, 获得精细的高铁震源时间函数, 然后使用有限元方法,在分层介质模型中进行高速铁路波场正演模拟计算, 并对不同速度的高铁列车正演模拟记录进行时移叠加, 获得虚拟道集, 从而验证叠加方法的正确性。

关键词: 高铁, 干涉场, 震源时间函数, 虚拟道集

YIN Changyang, SHI Yongxiang, WU Han, NING Jieyuan. Validation of the Virtual Gather Generation Method from Synthetic Data for High-Speed Rail Seismic Source[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2022, 58(5): 820-828.

殷常阳, 石永祥, 伍晗, 宁杰远. 基于合成数据对高铁震源虚拟道集生成方法的验证[J]. 北京大学学报自然科学版, 2022, 58(5): 820-828.

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URL: https://xbna.pku.edu.cn/EN/10.13209/j.0479-8023.2022.047

https://xbna.pku.edu.cn/EN/Y2022/V58/I5/820

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Validation of the Virtual Gather Generation Method from Synthetic Data for High-Speed Rail Seismic Source

基于合成数据对高铁震源虚拟道集生成方法的验证

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