Theoretical and Experimental Propagation of Elastic Waves in an Air-Fluid-Solid and in an Air-Fluid-Solid-Solid System

摘要

This report presents a comparison of the theoretical and experimental waveforms of the pressure response due to an impulsive source in an airfluid-solid and an air-fluid-solid-solid system. The theoretical expressions derived by spitznogle for the inclusion of the surface arrivals due to the water-air interface have been evaluated by computer techniques. They have been added to the results of the fluid-solid-solid theory to obtain the complete pressure response as a function of time. The experimental waveforms that are obtained in the laboratory compare favorably with the waveforms that are theoretically derived. This investigation should prove useful in predicting the total pressure response in either-shallow or deep water environments when the pressure is due to an impulsive source. (Author)