北京大学学报自然科学版 ›› 2019, Vol. 55 ›› Issue (5): 813-822.DOI: 10.13209/j.0479-8023.2019.074

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高铁地震波场特点的理论分析

温景充1,2, 宁杰远1,2,†, 张献兵1   

  1. 1. 北京大学地球与空间科学学院, 北京 100871 2. 高铁地震学联合研究组, 北京 100029
  • 收稿日期:2019-07-17 修回日期:2019-08-11 出版日期:2019-09-20 发布日期:2019-09-20
  • 通讯作者: 宁杰远, E-mail: njy(at)pku.edu.cn
  • 基金资助:
    国家自然科学基金(41874071)资助

Theoretical analysis on the Characteristics of Seismic Wave Field Produced by High-Speed Train

WEN Jingchong1,2, NING Jieyuan1,2,†, ZHANG Xianbing1   

  1. 1. School of Earth and Space Sciences, Peking University, Beijing 100871 2. The Joint Research Group of High-Speed Rail Seismology, Beijing100029
  • Received:2019-07-17 Revised:2019-08-11 Online:2019-09-20 Published:2019-09-20
  • Contact: NING Zhiyuan, E-mail: njy(at)pku.edu.cn

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摘要：

为了利用高铁震源反演浅层或深层地下结构, 将高铁铁路桥墩视为点源位置, 分别利用波阵面叠加、求解声波波场和半无限空间弹性波波场等方法, 对高铁激发的远场波场进行模拟。利用不同类型的震源时间函数与格林函数卷积计算得到的波场结果显示, 考虑高铁自重影响的桥墩静力响应的低频震源时间函数对应的波场与实际记录具有一定的相似性。

关键词: 高铁地震学, 声波, 弹性波, 格林函数, 干涉叠加

Abstract:

In order to invert shallow or deep underground structure by using high-speed train source, the far-field wave field excited by high-speed train is simulated by wave front superposition, solving acoustic wave field and elastic wave field in semi-infinite space. During the calculation, a pier of high-speed rail is regarded as a point source. The results of wave field calculated by convolution of different types of source time function and Green’s function show that the wave field corresponding to the low frequency source time function of pier static response considering the influence of high-speed train deadweight is similar to the actual record.

Key words: high-speed train seismology, acoustic wave, elastic wave, Green’s function, interference superposition

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