Title :
Pulse diffraction by a step discontinuity
Author :
Zhang, Q. ; Jull, E.V.
Author_Institution :
Dept. of Electr. Eng., British Colombia Univ., Vancouver, BC, Canada
Abstract :
The uniform geometrical theory of diffraction (GTD) is used to obtained a frequency-domain solution for acoustic point-source diffraction by a 90 degrees C step in a plane-surface with a hard boundary condition. The time-domain solution is then construction for an appropriate seismic pulse in which the low-frequency components are suppressed and the results presented in a form for geophysical interpretation. It is noted that results generated using the solutions thus obtained are in better agreement with experiment than numerical values based on the Kirchhoff method.<>
Keywords :
acoustic wave diffraction; boundary-value problems; seismic waves; seismology; acoustic point-source diffraction; geometrical theory of diffraction; geophysical interpretation; hard boundary condition; seismic pulse; step discontinuity; time-domain solution; Acoustic applications; Acoustic diffraction; Acoustic pulses; Acoustic reflection; Acoustic waves; Electromagnetic diffraction; Electromagnetic modeling; Electromagnetic reflection; Frequency domain analysis; Physical theory of diffraction;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1988. AP-S. Digest
Conference_Location :
Syracuse, NY, USA
DOI :
10.1109/APS.1988.94013
