Normally incident wave propagation across a joint set with the virtual wave source method

This paper presents an analytical study on normally incident wave propagation across a joint set. Combined with the displacement discontinuity method (DDM), the virtual wave source method (VWSM) is adopted to take account of multiple wave reflections among joints. After theoretical formulation, a co...

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Veröffentlicht in:Journal of applied geophysics 2011-03, Vol.73 (3), p.283-288
Hauptverfasser: Zhu, J.B., Zhao, X.B., Li, J.C., Zhao, G.F., Zhao, J.
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container_end_page 288
container_issue 3
container_start_page 283
container_title Journal of applied geophysics
container_volume 73
creator Zhu, J.B.
Zhao, X.B.
Li, J.C.
Zhao, G.F.
Zhao, J.
description This paper presents an analytical study on normally incident wave propagation across a joint set. Combined with the displacement discontinuity method (DDM), the virtual wave source method (VWSM) is adopted to take account of multiple wave reflections among joints. After theoretical formulation, a comparison between results from VWSM and those from the method of characteristics (MC) is carried out. These results agree well with each other, and the applicability of VWSM into wave propagation study is verified. Subsequently, an interesting phenomenon, i.e., the magnitude of transmission coefficient increases with joint number on some circumstances, is pointed out and studied. By analyzing differently arriving transmitted waves and their superposition, such phenomenon is explained. ► A modified virtual wave source method is introduced and validated. ► The modified method has several advantages. ► Wave propagation through jointed rock masses is studied. ► An “abnormal” phenomenon is pointed out and explained.
doi_str_mv 10.1016/j.jappgeo.2011.01.012
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subjects Applied geophysics
Discontinuity
Displacement
Earth sciences
Earth, ocean, space
Exact sciences and technology
Formulations
Geophysics
Incident waves
Internal geophysics
Mathematical analysis
Method of characteristics
Rock joints
Transmission coefficient
Virtual wave source method
Wave propagation
Wave reflection
title Normally incident wave propagation across a joint set with the virtual wave source method
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