WIT Press


High-frequency Acoustic Emission Generated By Underwater Explosion With Cylindrical Symmetry

Price

Free (open access)

Paper DOI

10.2495/AFM000631

Volume

29

Pages

5

Published

2000

Size

424 kb

Author(s)

L. Likhterov

Abstract

A high-frequency part of the acoustic spectrum excited by an underwater explosion with cylindrical symmetry is investigated theoretically. It is assumed that the liquid is inviscid and incompressible, the surface tension is negligible and the model for the explosive source is infinite in extent. A simple solution can be obtained when the adiabatic exponent is equal to 1.625. This, fortunately, gets into the interval of permissible heat ratio values. It is shown that, in the first approximation, the spectral density of the acoustic energy emitted by the underwater explosion with cylindrical symmetry varies as the minus 2/7 power of the frequency and decreases approximately by 2 decibels per octave. Such slow decay of the spectral density versus frequency is due to the adopted assumption about liquid incomp

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