差分法计算地震动旋转分量

李栋青; 王赟; 孙丽霞

doi:10.3799/dqkx.2019.265

Volume 46 Issue 1

Jan. 2021

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Article Navigation > Earth Science > 2021 > 46(1): 369-380

Li Dongqing, Wang Yun, Sun Lixia, 2021. Calculating Rotational Components of Ground Motions by Finite Difference Method. Earth Science, 46(1): 369-380. doi: 10.3799/dqkx.2019.265

Citation:

Li Dongqing, Wang Yun, Sun Lixia, 2021. Calculating Rotational Components of Ground Motions by Finite Difference Method. Earth Science, 46(1): 369-380. doi: 10.3799/dqkx.2019.265

Li Dongqing, Wang Yun, Sun Lixia, 2021. Calculating Rotational Components of Ground Motions by Finite Difference Method. Earth Science, 46(1): 369-380. doi: 10.3799/dqkx.2019.265

Citation:

Li Dongqing, Wang Yun, Sun Lixia, 2021. Calculating Rotational Components of Ground Motions by Finite Difference Method. Earth Science, 46(1): 369-380. doi: 10.3799/dqkx.2019.265

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Calculating Rotational Components of Ground Motions by Finite Difference Method

doi: 10.3799/dqkx.2019.265

School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China

Received Date: 2019-10-21
Publish Date: 2021-01-15

Abstract

Abstract

Rotational seismology is a new subject to study the motions of the earth's medium caused by earthquakes, blasting and environmental vibration in an all-round way. The study of rotational components of ground motion has a long history. However, there is no high-precision rotational component seismograph, so the study of rotational motions is usually limited to theoretical aspects. As an alternative method of calculating rotational components by translational components, the finite difference method is relatively mature in theoretical research, but its application in practical data is still less. Based on the full investigation of the research that studying the rotational motions, the finite difference method is tested and analyzed by using the simulated data and the recording explosive source data. By comparing the waveforms, amplitude spectra and phase spectra of the rotational components calculated by the finite difference method with thoserecorded, it is concluded that the finite difference method can be used as an effective alternative to calculate the horizontal rotational components (R_X, R_Y) within an error allowable range. At the same time, in view of the high frequency characteristics of the explosive source and the dense array, we have improved the finite difference method and proposed a higher precision finite difference method for calculating rotational components.
- rotational seismology,
- finite difference method,
- translational component,
- simulated data,
- explosive source,
- geophysics

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References(23)

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