Experimental damping assessment of a full scale offshore mono bucket foundation

Szymon Gres; Morten Fejerskov; Lars Bo Ibsen; Lars Damkilde

Experimental damping assessment of a full scale offshore mono bucket foundation

Szymon Gres, Morten Fejerskov, Lars Bo Ibsen, Lars Damkilde

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

6 Citationer (Scopus)

68 Downloads (Pure)

Abstract

This paper quantifies the system damping of a offshore meteorological mast supported by a Mono Bucket foundation based on a long-term experimental campaign. The structure is located at Dogger Bank west, North Sea, and equipped with a measurement system monitoring acceleration, strain, inclination and sea surface elevation. Natural frequencies and corresponding damping ratios are assessed using different operational modal analysis techniques, enhanced frequency domain decomposition and stochastic subspace identification. Application and results from both methods are compared and discussed. Research shows that the total damping ratio of the lowest eigenmode is normally distributed with mean value of 1.11% of critical damping. Linear correlation between the damping ratio and the significant wave height is observed.

Originalsprog	Engelsk
Titel	Proceedings of ISMA2016 : International conference proceedings on noise and vibration engineering
Redaktører	P. Sas, D. Moens, A. van de Walle
Antal sider	10
Udgivelsessted	Leuven
Forlag	KU Leuven, Department of Mechanical Engineering, PMA
Publikationsdato	2016
Sider	4045-4054
Status	Udgivet - 2016
Begivenhed	The International Conference on Noise and Vibration Engineering - Leuven, Belgien Varighed: 19 sep. 2016 → 21 sep. 2016 Konferencens nummer: 2016

Konference

Konference	The International Conference on Noise and Vibration Engineering
Nummer	2016
Land/Område	Belgien
By	Leuven
Periode	19/09/2016 → 21/09/2016

Emneord

Offshore foundations
Mono bucket foundation
Full scale
Experimental damping assessment

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Experimental damping assessment of a full scale offshore mono bucket foundationAccepteret manuskript, 249 KB

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Citationsformater

@inproceedings{b5102101d7e545dd83f54e17863733e5,

title = "Experimental damping assessment of a full scale offshore mono bucket foundation",

abstract = "This paper quantifies the system damping of a offshore meteorological mast supported by a Mono Bucket foundation based on a long-term experimental campaign. The structure is located at Dogger Bank west, North Sea, and equipped with a measurement system monitoring acceleration, strain, inclination and sea surface elevation. Natural frequencies and corresponding damping ratios are assessed using different operational modal analysis techniques, enhanced frequency domain decomposition and stochastic subspace identification. Application and results from both methods are compared and discussed. Research shows that the total damping ratio of the lowest eigenmode is normally distributed with mean value of 1.11% of critical damping. Linear correlation between the damping ratio and the significant wave height is observed.",

keywords = "Offshore foundations, Mono bucket foundations, Full scale, Experimental damping assessment, Offshore foundations, Mono bucket foundation, Full scale, Experimental damping assessment",

author = "Szymon Gres and Morten Fejerskov and Ibsen, {Lars Bo} and Lars Damkilde",

year = "2016",

language = "English",

pages = "4045--4054",

editor = "P. Sas and D. Moens and {van de Walle}, A.",

booktitle = "Proceedings of ISMA2016",

publisher = "KU Leuven, Department of Mechanical Engineering, PMA",

note = "The International Conference on Noise and Vibration Engineering, ISMA ; Conference date: 19-09-2016 Through 21-09-2016",

}

Gres, S, Fejerskov, M, Ibsen, LB & Damkilde, L 2016, Experimental damping assessment of a full scale offshore mono bucket foundation. i P Sas, D Moens & A van de Walle (red), Proceedings of ISMA2016: International conference proceedings on noise and vibration engineering. KU Leuven, Department of Mechanical Engineering, PMA, Leuven, s. 4045-4054, The International Conference on Noise and Vibration Engineering, Leuven, Belgien, 19/09/2016.

Experimental damping assessment of a full scale offshore mono bucket foundation. / Gres, Szymon; Fejerskov, Morten; Ibsen, Lars Bo et al.
Proceedings of ISMA2016: International conference proceedings on noise and vibration engineering. red. / P. Sas; D. Moens; A. van de Walle. Leuven: KU Leuven, Department of Mechanical Engineering, PMA, 2016. s. 4045-4054.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

TY - GEN

T1 - Experimental damping assessment of a full scale offshore mono bucket foundation

AU - Gres, Szymon

AU - Fejerskov, Morten

AU - Ibsen, Lars Bo

AU - Damkilde, Lars

N1 - Conference code: 2016

PY - 2016

Y1 - 2016

N2 - This paper quantifies the system damping of a offshore meteorological mast supported by a Mono Bucket foundation based on a long-term experimental campaign. The structure is located at Dogger Bank west, North Sea, and equipped with a measurement system monitoring acceleration, strain, inclination and sea surface elevation. Natural frequencies and corresponding damping ratios are assessed using different operational modal analysis techniques, enhanced frequency domain decomposition and stochastic subspace identification. Application and results from both methods are compared and discussed. Research shows that the total damping ratio of the lowest eigenmode is normally distributed with mean value of 1.11% of critical damping. Linear correlation between the damping ratio and the significant wave height is observed.

AB - This paper quantifies the system damping of a offshore meteorological mast supported by a Mono Bucket foundation based on a long-term experimental campaign. The structure is located at Dogger Bank west, North Sea, and equipped with a measurement system monitoring acceleration, strain, inclination and sea surface elevation. Natural frequencies and corresponding damping ratios are assessed using different operational modal analysis techniques, enhanced frequency domain decomposition and stochastic subspace identification. Application and results from both methods are compared and discussed. Research shows that the total damping ratio of the lowest eigenmode is normally distributed with mean value of 1.11% of critical damping. Linear correlation between the damping ratio and the significant wave height is observed.

KW - Offshore foundations

KW - Mono bucket foundations

KW - Full scale

KW - Experimental damping assessment

KW - Offshore foundations

KW - Mono bucket foundation

KW - Full scale

KW - Experimental damping assessment

UR - https://www.isma-isaac.be/publications/purchase.html

M3 - Article in proceeding

SP - 4045

EP - 4054

BT - Proceedings of ISMA2016

A2 - Sas, P.

A2 - Moens, D.

A2 - van de Walle, A.

PB - KU Leuven, Department of Mechanical Engineering, PMA

CY - Leuven

T2 - The International Conference on Noise and Vibration Engineering

Y2 - 19 September 2016 through 21 September 2016

ER -

Experimental damping assessment of a full scale offshore mono bucket foundation

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