Reflection and transmission of plane harmonic P wave at planar interface between elastic medium and frozen poroelastic medium. Issue 2 (10th March 2023)

• Record Type: Journal Article
• Authors: Ma, Qiang; Jiang, Huipeng; Zhou, Fengxi
• Is Part Of: Geophysical journal international. Volume 234:Issue 2(2023)
• Page Start: 948
• Page End: 971
• Publication Date: 2023-03-10
• Subjects: Body waves -- Earthquake dynamics -- Wave propagation -- Saturated frozen poroelastic medium -- Transmission and reflection energy ratios; Geophysics -- Periodicals; 550
• DOI: 10.1093/gji/ggad104
• Languages: English
• ISSNs: 0956-540X

Abstract

SUMMARY: Based on the propagation theory of elastic waves in three-phase frozen poroelastic media and single-phase elastic media, the energy transmission problem of a plane harmonic P -wave incident at the planar interface between elastic medium and frozen poroelastic medium is studied. According to the boundary conditions at the planar interface, the analytical expressions of the transmission and reflection coefficients and energy ratios of the transmitted and reflected waves are derived. The relationship between the energy of plane harmonic P -wave incident on the planar interface between elastic medium and frozen poroelastic medium and the incident angle, frequency of incident wave, cementation parameters, porosity, saturation and contact parameters are investigated. The results show that the incident angle significantly affects the reflection and transmission energy ratios; the incidence frequency only has a large effect on the transmission energy ratios of the transmitted P 2, P 3 and S 2 waves; the contact parameters have a relatively large effect on the reflected S wave and the transmitted P 2, P 3, S 1 and S 2 waves, but have a smaller effect on the reflected P wave and the transmitted P 1 wave; cementing parameters, porosity, saturation has a great influence on the energy ratios.