Diffraction of SH cylindrical waves by a finite crack: an analytical solution

Details Diffraction of SH cylindrical waves by a finite crack: an analytical solution Diffraction of SH cylindrical waves by a finite crack: an analytical solution

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010geoji.181.1634i&link_type=abstract

Geophysical Journal International, Volume 181, Issue 3, pp. 1634-1642.

Astronomy and Astrophysics

Astronomy

Theoretical Seismology, Wave Scattering And Diffraction, Wave Propagation, Fractures And Faults

Scientific paper

A new analytic solution for the problem of a line source of harmonic SH waves that struck a finite 2-D plane crack is introduced. This construct is based on Macdonald's solution for the problem of cylindrical acoustic waves diffracted by a wedge. We consider this approach, since special cases of wedges include semi-infinite cracks. The finite crack is assembled by superimposing the effects of two semi-infinite cracks. The new solution is obtained by taking into account diffracted waves generated at the edges travelling along the faces of the crack. Repeated wave fields that result from fitting the two cracks are removed. Comparisons with the results obtained with the Indirect Boundary Element Method (IBEM) are shown. Both frequency and time domain cases are included.

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