Wave propagation in layered model due to point-source loading in low-impedance medium

1971 ◽  
Vol 11 (5) ◽  
pp. 210-216 ◽  
Author(s):  
I. M. Daniel ◽  
R. L. Marino
Keyword(s):  
Wave Propagation ◽  
Point Source ◽  
Layered Model

WAVE PROPAGATION IN A LAYERED MODEL DUE TO POINT SOURCE LOADING IN A HIGH‐IMPEDANCE MEDIUM

Geophysics ◽  
1971 ◽  
Vol 36 (3) ◽  
pp. 517-532 ◽  
Author(s):  
I. M. Daniel ◽  
R. L. Marino
Keyword(s):  
Wave Propagation ◽  
Point Source ◽  
Explosive Loading ◽  
Isochromatic Fringe ◽  
Layered Model ◽  
High Impedance ◽  
Impedance Ratio ◽  
Fringe Patterns ◽  
Refracted Waves ◽  
Attenuation Characteristics

Dynamic photoelastic techniques were used to study the incident, reflected, and refracted waves in a layered model. The model, consisting of two birefringent layers with an impedance ratio of 2.2:1, was subjected to point source explosive loading in the high‐impedance medium. The isochromatic fringe patterns were photographed with a Cranz‐Schardin multiple spark camera operating at a rate of 200,000 frames per second. Propagation and attenuation characteristics of waves in both layers were studied.

Transformation from 2-D to 3-D wave propagation for horizontally layered media

Geophysics ◽  
1994 ◽  
Vol 59 (12) ◽  
pp. 1920-1926 ◽  
Author(s):  
Lasse Amundsen ◽  
Arne Reitan
Keyword(s):  
Wave Propagation ◽  
Point Source ◽  
Line Source ◽  
Layered Media ◽  
Cylindrical Symmetry ◽  
Seismic Processing ◽  
Geometric Spreading ◽  
Processing Algorithms ◽  
The Relationship ◽  
D Wave

The relationship between 2-D and 3-D wave propagation in horizontally layered media was first investigated by Dampney (1971). In the last few years the usefulness and feasibility of transforming point‐source responses with 3-D geometric spreading to equivalent line‐source responses with 2-D geometric spreading have been thoroughly discussed (see Helgesen, 1990; Wapenaar et al., 1990, 1992; Herrmann, 1992; Helgesen and Kolb, 1993; Amundsen, 1993). In the case of cylindrical symmetry this transformation constitutes a required preprocessing step for several seismic processing algorithms based on 2-D wave propagation. The work of Dampney (1971) has apparently been missed by the authors discussing the 3-D to 2-D geometric spreading transform.

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