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