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Measurement and characterisation of radiated underwater sound from a 3.6 MW monopile wind turbine

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posted on 07.12.2016, 11:52 by Tanja Pangerc, Pete D. Theobald, Lian-Sheng Wang, Stephen P. Robinson, Paul Lepper
This paper describes underwater sound pressure measurements obtained in close proximity (50 m) to two individual wind turbines, over a 21-day period, capturing the full range of turbine operating conditions. The sound radiated into the water was characterised by a number of tonal components, which are thought to primarily originate from the gearbox for the bandwidth measured. The main signal associated with the turbine operation had a mean-square sound pressure spectral density level which peaked at 126 dB re 1 lPa2 Hz 1 at 162 Hz. Other tonal components were also present, notably at frequencies between about 20 and 330 Hz, albeit at lower amplitudes. The measured sound characteristics, both in terms of frequency and amplitude, were shown to vary with wind speed. The sound pressure level increased with wind speed up to an average value of 128 dB re 1 lPa at a wind speed of about 10 ms 1, and then showed a general decrease. Overall, differences in the mean-square sound pressure spectral density level of over 20 dB were observed across the operational envelope of the turbine.

Funding

Department for Business, Energy and Industrial Strategy (BEIS) through the National Measurement System Programme for Acoustics and Ionising Radiation Metrology.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

The Journal of the Acoustical Society of America

Volume

140

Issue

4

Pages

2913 - 2922

Citation

PANGERC, T. ... et al, 2016. Measurement and characterisation of radiated underwater sound from a 3.6 MW monopile wind turbine. Journal of the Acoustical Society of America, 140 (4), pp. 2913-2922.

Publisher

© Acoustical Society of America

Version

VoR (Version of Record)

Acceptance date

01/10/2016

Publication date

2016-10-26

Copyright date

2016

Notes

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. This article appeared in PANGERC, T. ... et al, 2016. Measurement and characterisation of radiated underwater sound from a 3.6 MW monopile wind turbine. The Journal of the Acoustical Society of America, 140 (4), pp. 2913-2922 and may be found at http://dx.doi.org/10.1121/1.4964824

ISSN

0001-4966

eISSN

1520-8524

Language

en

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