CONVERTION OF WAVE MODES UPON REFLECTION AT THE BOUNDARY BETWEEN ELASTIC HALF-SPACES

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详细

It is known that an incident bulk P-wave propagating in a homogeneous isotropic halfspace, being reflected from the plane boundary, may exhibit a mode conversion into shear S-wave without the formation of reflected P-waves. The mode conversion takes place, when the incident wave hits the boundary at some critical angles, which depend upon Poisson’s ratio. Herein, it is revealed that the Jeffreys solution for the mode conversion angles needs in in corrections, mainly because of spurious roots, appeared at solving a specially constructed eighth-order polynomial for the P-wave reflection coefficient. The developed approach allowed us to construct a bi-cubic polynomial and obtain analytical expressions for its roots, and to find correct values for angles of incidence, at which the mode conversion occurs.

作者简介

A. Karakozova

Moscow State University of Civil Engineering

Email: karioca@mail.ru
Москва, Россия

S. Kuznetsov

Moscow State University of Civil Engineering; Institute of Mechanics of the Russian Academy of Sciences named after A.Yu. Ishlinsky

编辑信件的主要联系方式.
Email: karioca@mail.ru
Москва, Россия; Москва, Россия

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