Physical model of acoustic forward scattering by cylindrical shell and its experimental validation |
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| Authors: | Lei Bo Yang Kun-De and MaYuan-Liang |
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| Affiliation: | College of Marine, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | Research on the underwater target scattering can provide
important theoretical support for target detection. The scattering
model of cylindrical shell is established in this paper. It is found
that the forward target strength is much stronger and varies with
angles of incident wave less significantly than backward target
strength. The received forward signal strength fluctuates with the
target moving due to the interference between direct signal and
scattering signal, which is most significant when target approaches
the baseline. An experiment is carried out in an anechoic tank to
validate the scattering model. The method of acquisiting forward
scattering in the tank is proposed. The forward and the backward
target strengths are achieved by using the pulse compression
technology, and they are about 3dB less than the modeling results.
The forward scattering phenomena of quiescent and moving target are
measured, which are similar to modeling results with different
target types. |
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| Keywords: | scattering model forward scattering target strength shell |
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