Signal reconstruction of surface waves on SASW measurement using Gaussian Derivative wavelet transform

Czasopismo : Acta Geophysica
Tytuł artykułu : Signal reconstruction of surface waves on SASW measurement using Gaussian Derivative wavelet transform

Autorzy :
Yamasaki, K.
Department of Earth and Planetary Sciences, Faculty of Science, Kobe University, Nada, Kobe, Japan,,
Teisseyre, R.
Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland,,
Herak, M.
University of Zagreb, Faculty of Science and Mathematics, Department of Geophysics, Zagreb, Croatia,,
Rosyidi, S. A. P.
Department of Civil Engineering, Muhammadiyah University of Yogyakarta, Yogyakarta, Indonesia,,
Abstrakty : Surface wave method consists of measurement and processing of the dispersive Rayleigh waves recorded from two or more vertical transducers. The dispersive phase data are inverted and the shear wave velocity versus depth is obtained. However, in case of residual soil, the reliable phase spectrum curve is difficult to be produced. Noises from nature and other human-made sources disturb the generated surface wave data. In this paper, a continuous wavelet transform based on mother wavelet of Gaussian Derivative was used to analyze seismic waves in different frequency and time. Time-frequency wavelet spectrum was employed to localize the interested seismic response spectrum of generated surface waves. It can also distinguish the fundamental mode of the surface wave from the higher modes of reflected body waves. The results presented in this paper showed that the wavelet analysis is able to determine reliable surface wave spectrum of sandy clayey residual soil.

Słowa kluczowe : signal reconstruction, continuous wavelet transform (CWT), surface waves, Gaussian Derivative wavelets,
Wydawnictwo : Instytut Geofizyki PAN
Rocznik : 2009
Numer : Vol. 57, no. 3
Strony : 616 – 635
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Cytuj : Yamasaki, K. ,Teisseyre, R. ,Herak, M. ,Rosyidi, S. A. P. , Signal reconstruction of surface waves on SASW measurement using Gaussian Derivative wavelet transform. Acta Geophysica Vol. 57, no. 3/2009