Details
| Original language | English |
|---|---|
| Pages (from-to) | 2212-2223 |
| Number of pages | 12 |
| Journal | Journal of the Acoustical Society of America |
| Volume | 146 |
| Issue number | 4 |
| Publication status | Published - 4 Oct 2019 |
Abstract
The bubble curtain is one of the most used measures to reduce underwater pile driving noise. A model of the local distribution of the effective wavenumber was developed. The bubble size distribution was derived from tank measurements. The local distribution of the air fraction was determined by means of an integral method. In a preliminary step, the transfer characteristics of a bubble curtain were studied. The results show a decrease of the transmission coefficient for higher frequencies and additionally for lower water depths. For lower frequencies, λ/2-transmission can be observed. Examining the noise mitigation of a bubble curtain under offshore conditions, a model of the acoustical scenario was developed. Two different offshore measurement sites are described in detail and compared to the modeling results. The distance between bubble curtain and the pile was identified as an important parameter affecting the noise mitigation. The presented approach shows an appropriate representation of the noise mitigation and allows, due to its generic definition, for future investigations of various aspects, e.g., the influence of the soil or the effect of an extra pile near system on the noise mitigation.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
Sustainable Development Goals
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of the Acoustical Society of America, Vol. 146, No. 4, 04.10.2019, p. 2212-2223.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modeling the noise mitigation of a bubble curtain
AU - Bohne, Tobias
AU - Grießmann, Tanja
AU - Rolfes, Raimund
N1 - Funding information: The Institute of Structural Analysis is part of the Center for Wind Energy Research For-Wind. Part of the research at Leibniz University Hannover on numerical modeling of a bubble curtain was carried out in the frame of the BORA project in cooperation with project partners from the University of Kiel and the Hamburg University of Technology. The authors gratefully acknowledge the funding of the Federal Ministry for Economic Affairs and Energy due to an act of the German Parliament (project Ref. No. 0325421).
PY - 2019/10/4
Y1 - 2019/10/4
N2 - The bubble curtain is one of the most used measures to reduce underwater pile driving noise. A model of the local distribution of the effective wavenumber was developed. The bubble size distribution was derived from tank measurements. The local distribution of the air fraction was determined by means of an integral method. In a preliminary step, the transfer characteristics of a bubble curtain were studied. The results show a decrease of the transmission coefficient for higher frequencies and additionally for lower water depths. For lower frequencies, λ/2-transmission can be observed. Examining the noise mitigation of a bubble curtain under offshore conditions, a model of the acoustical scenario was developed. Two different offshore measurement sites are described in detail and compared to the modeling results. The distance between bubble curtain and the pile was identified as an important parameter affecting the noise mitigation. The presented approach shows an appropriate representation of the noise mitigation and allows, due to its generic definition, for future investigations of various aspects, e.g., the influence of the soil or the effect of an extra pile near system on the noise mitigation.
AB - The bubble curtain is one of the most used measures to reduce underwater pile driving noise. A model of the local distribution of the effective wavenumber was developed. The bubble size distribution was derived from tank measurements. The local distribution of the air fraction was determined by means of an integral method. In a preliminary step, the transfer characteristics of a bubble curtain were studied. The results show a decrease of the transmission coefficient for higher frequencies and additionally for lower water depths. For lower frequencies, λ/2-transmission can be observed. Examining the noise mitigation of a bubble curtain under offshore conditions, a model of the acoustical scenario was developed. Two different offshore measurement sites are described in detail and compared to the modeling results. The distance between bubble curtain and the pile was identified as an important parameter affecting the noise mitigation. The presented approach shows an appropriate representation of the noise mitigation and allows, due to its generic definition, for future investigations of various aspects, e.g., the influence of the soil or the effect of an extra pile near system on the noise mitigation.
UR - http://www.scopus.com/inward/record.url?scp=85073431484&partnerID=8YFLogxK
U2 - 10.1121/1.5126698
DO - 10.1121/1.5126698
M3 - Article
C2 - 31671959
AN - SCOPUS:85073431484
VL - 146
SP - 2212
EP - 2223
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
SN - 0001-4966
IS - 4
ER -