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    Home > Biochemistry News > Biotechnology News > Ning Jieyuan's research group from the School of Earth and Space confirms the existence of Doppler effect in the seismic wave field of high-speed railways

    Ning Jieyuan's research group from the School of Earth and Space confirms the existence of Doppler effect in the seismic wave field of high-speed railways

    • Last Update: 2022-03-04
    • Source: Internet
    • Author: User
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    The seismology community has long regarded road vibrations as noise that affects seismic observations


    The road source represented by high-speed rail is a typical mobile combined source, which is significantly different from the traditional point source, and its wave field characteristics need to be further studied


    In a recent study, the team of Prof.


    Figure 1 Journal cover and article homepage

    The article proposes that, for high-speed trains running on viaducts, a series of eigenfrequencies (“vehicle frequencies”) periodically generated by the carriages do not produce Doppler effects; ”), there is the Doppler effect, and there are blue shifts and red shifts before and after the train


    Figure 2 Three synthetic records (a~c) and two actual records (d, e)

    (a) A single set of wheels for a single car; (b) 4 sets of wheels for a single car; (c) 4 sets of wheels for a multi-car


    The paper further proposes a medium wave velocity measurement method based on the Doppler effect


    Fig.


    The results of (a) and (c) are from station RD002; the results of (b) and (d) are from all stations


    Publication information

    Chinese: Jiang Yiran, Ning Jieyuan, Wen Jingchong, Shi Yongxiang.


    English: Jiang Y, Ning J, Wen J, Shi Y.



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