Surface-Wave Simulation for the Continuously Moving Seismic Sources

Yan Yuefeng; Sun Chengyu; Lin Tengfei; Wang Jiao; Yang Jidong; Wu Dunshi

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Surface-Wave Simulation for the Continuously Moving Seismic Sources

机译：持续移动地震源的表面波仿真

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In exploration and earthquake seismology, most sources used in subsurface structure imaging and rock property estimation are fixed in certain positions. Continuously moving seismic sources, such as vehicles and the metro, are one kind of important passive sources in ambient noise research. Commonly, seismic data acquisition and processing for moving sources are based on the assumption of simple point passive sources, and the dispersion curve inversion is applied to constrain near-surface velocity. This workflow neglects the Doppler effects. Considering the continuously moving properties of the sources, we first derive the analytical solution for the Rayleigh waves excited by heavy vehicles and then analyze their Doppler effects and dispersion curves. We observe that the moving source data have the Doppler effect when compared with the changes in the frequency of the source intensity, but this effect does not affect the frequency dispersion of Rayleigh waves. The dispersion curves computed for moving source records are consistent with the analytical dispersion solutions, which provide a theoretical foundation for velocity estimation using moving source data.

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《Seismological research letters》 |2021年第4期|共12页
作者
Yan Yuefeng; Sun Chengyu; Lin Tengfei; Wang Jiao; Yang Jidong; Wu Dunshi;
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作者单位

China Univ Petr East China Sch Geosci Qingdao Peoples R China;

China Univ Petr East China Sch Geosci Qingdao Peoples R China;

PetroChina Dept Middle East E&

P RIPED Beijing Peoples R China;

Qingdao Huanghai Univ Qingdao Peoples R China;

China Univ Petr East China Sch Geosci Qingdao Peoples R China;

PetroChina Res Inst Petr Explorat &

Dev Northwest Lanzhou Peoples R China;

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正文语种 eng
中图分类地震学;
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Surface-Wave Simulation for the Continuously Moving Seismic Sources

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