Generation of acoustic waves by an impulsive point source in a fluid/solid configuration with a plane boundary

1984 ◽  
Vol 75 (6) ◽  
pp. 1709-1715 ◽  
Author(s):  
Adrianus T. de Hoop ◽  
J. H. M. T. van der Hijden
Keyword(s):  
Point Source ◽  
Acoustic Waves ◽  
Plane Boundary

Acoustic waves generated by a point source in a sloping fluid layer

1989 ◽  
Vol 85 (4) ◽  
pp. 1414-1426 ◽  
Author(s):  
Yih‐Hsing Pao ◽  
Franz Ziegler ◽  
Yi‐Sun Wang
Keyword(s):  
Point Source ◽  
Acoustic Waves ◽  
Fluid Layer

Seismic waves generated by an impulsive point source in a solid/fluid configuration with a plane boundary

Geophysics ◽  
1985 ◽  
Vol 50 (7) ◽  
pp. 1083-1090 ◽  
Author(s):  
Adrianus T. de Hoop ◽  
Jos H. M. T. van der Hijden
Keyword(s):  
Point Source ◽  
Seismic Waves ◽  
Integral Transform ◽  
Vertical Plane ◽  
Computation Time ◽  
Plane Boundary ◽  
Head Wave ◽  
Transform Method ◽  
Expansion Model ◽  
Fluid Configuration

The space‐time acoustic wave motion generated by an impulsive point source in a solid/fluid configuration with a vertical plane boundary is calculated with the aid of the modified Cagniard method. Two types of sources are considered in detail, viz. (1) a point source of expansion (model for an explosive source), and (2) a point force parallel to the vertical interface (model for a mechanical vibrator). Numerical results are presented for the transmitted scalar traction in the fluid in those regions of space where head wave contributions occur. There is a marked difference in the time response observed for the two types of sources and for the different positions of the receiver in the fluid with respect to the position of the source in the solid. These waveform differences are important when the transmitted wave in the fluid is used to determine experimentally the elastic properties of the solid. Scholte waves are observed only when the source is close to the fluid/solid interface. As compared with the traditional Fourier‐Bessel integral transform method of handling this problem, the computation time with the method presented here is considerably less.

Acoustic waves: a finite difference film

1983 ◽  
Vol 20 (3) ◽  
pp. 506-508
Author(s):  
George McMechan ◽  
Bill Price
Keyword(s):  
Finite Difference ◽  
Point Source ◽  
Acoustic Waves ◽  
Time Frame ◽  
Two Dimensional ◽  
Acoustic Wave Equation ◽  
Dimensional Model ◽  
Varying Thickness ◽  
Finite Difference Solution ◽  
Circular Wavefront

A finite difference solution of the acoustic wave equation is an ideal basis for making movies since the computations naturally provide a series of frames at successive, discrete time increments. Each time frame contains a picture of the wave field present at that time. An example is illustrated in a short (~2.8 Min) 16 mm film that shows the dynamic response of a two-dimensional model to a point source. The model consists of a layer of varying thickness that overlies a half space. The film shows the point source expanding into a circular wavefront that is reflected, refracted, and diffracted by the model.

Acoustic waves generated by a laser point source in an isotropic cylinder

2004 ◽  
Vol 116 (2) ◽  
pp. 814-820 ◽  
Author(s):  
Yongdong Pan ◽  
Clément Rossignol ◽  
Bertrand Audoin
Keyword(s):  
Point Source ◽  
Acoustic Waves ◽  
Isotropic Cylinder

Scattering of acoustic waves from a point source over an impedance wedge

Wave Motion ◽  
2020 ◽  
Vol 93 ◽  
pp. 102472
Author(s):  
Mikhail A. Lyalinov ◽  
Svetlana V. Polyanskaya
Keyword(s):  
Point Source ◽  
Acoustic Waves ◽  
Impedance Wedge ◽  
Scattering Of Acoustic Waves
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