Health & Environmental Research Online (HERO)


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8371644 
Journal Article 
Experimental apparatus for spherical wave propagation in solid 
Wang, Z; Li, X; Zhang, R; Zheng, X; Zhu, Y; Liu, X; Hu, Z 
2000 
20 
2 
103-109 
Chinese 
An experimental apparatus for spherical divergent wave propagation in solid was developed. Spherical waves were generated by using miniature spherical explosives with yields equivalent to 0.12 g and 0.49 g of TNT and the circular electromagnetic particle velocity gages were used to monitor particle velocities in PMMA and granite. The miniature charges make it possible to study the wave propagation in a medium at larger scaled distances by using smaller blocks of the sample medium. Using the electromagnetic particle velocity gages, the signal outputs are kept unattenuated due to the geometrical divergence, and represent the average of the measured dynamic states of the medium over a circle on the wavefront.