UNDERWATER SHOCK WAVE FREQUENCY SPECTRUM ANALYSIS. V. SPECTRA OF REFRACTED PULSES COMPARED WITH ISOVELOCITY SHOCK WAVES,
Abstract
Fourier integral spectra of refracted shock waves from 56-lb TNT explosions fired at 50-ft depth were digitally computed on the IBM-7090. Comparisons were made between the spectra of various refracted pulses and the spectrum of the shock wave expected in isovelocity water at the same distance. Pulses received in the 'shadow zone', at the caustic, and in the region of multiple arrivals of the ray pattern were analyzed. The maximum spectral density level increases as the impulse increases; spectral oscillations are a function of surface cut-off times and of the difference in arrival times of the multiple peaks. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 17, 1966
- Accession Number
- AD0632529
Entities
People
- Mary Alice Genau
Organizations
- Naval Ordnance Laboratory