Wideband measurement of acoustic scattering from a cylindrical shell using a parametric array
Wang, Lian Sheng, Humphrey, Victor, Menon, Raghav, Stacey, Phil and Lepper, Paul (2009) Wideband measurement of acoustic scattering from a cylindrical shell using a parametric array. In, Third International Conference on Underwater Acoustic Measurements, Technologies and Results, Nafplion, Greece, 21 - 26 Jun 2009. 8pp.
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Description/Abstract
An experiment to measure the backscattering from a partially water-filled cylindrical shell of mild steel using a parametric array has been performed at the National Physical Laboratory (NPL) facility on Wraysbury reservoir. The purpose of the experiment was to obtain information on the frequency responses of the target for different angles of incidence, over a wide frequency range, for comparison with theoretical and numerical predictions. A parametric array system developed by Loughborough University was used for the experiment. The transmitting transducer was a square planar array with a centre
frequency of 75 kHz; a number of secondary waveforms were generated, including tone bursts, Ricker pulses and frequency chirps. The target used in the experiment was 1.4 m long
with hemispherical ends, and had a radius of 0.28 m and a wall thickness of 4 mm. Overall the response was measured at secondary frequencies from 2 to 24 kHz and primary frequencies from 63 to 87 kHz. Some measured results in terms of the time and frequency responses as a function of angle of incidence are presented here
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Additional Information: | Paper 31-3 |
| Related URLs: | |
| Keywords: | parametric array, partially water-filled, cylindrical shell, backscattering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics |
| Item ID: | 79117 |
| Date Deposited: | 19 Mar 2010 |
| Last Modified: | 02 Mar 2012 13:57 |
| Contributors: | Wang, Lian Sheng (Author) Humphrey, Victor (Author) Menon, Raghav (Author) Stacey, Phil (Author) Lepper, Paul (Author) Papdakis, J.S. (Editor) Bjorno, L. (Editor) |
| Date: | June 2009 |
| Additional Information: | Paper 31-3 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/79117 |
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