Experimental damping assessment of a full scale offshore mono bucket foundation

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

1 Citation (Scopus)

Resumé

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.
OriginalsprogEngelsk
TitelProceedings of ISMA2016 : International conference proceedings on noise and vibration engineering
RedaktørerP. Sas, D. Moens, A. van de Walle
Antal sider10
Udgivelses stedLeuven
ForlagKU Leuven, Department of Mechanical Engineering, PMA
Publikationsdato2016
Sider4045-4054
StatusUdgivet - 2016
BegivenhedThe International Conference on Noise and Vibration Engineering - Leuven, Belgien
Varighed: 19 sep. 201621 sep. 2016
Konferencens nummer: 2016

Konference

KonferenceThe International Conference on Noise and Vibration Engineering
Nummer2016
LandBelgien
ByLeuven
Periode19/09/201621/09/2016

Fingerprint

Damping
Modal analysis
Natural frequencies
Decomposition
Monitoring

Emneord

  • Offshore foundations
  • Mono bucket foundation
  • Full scale
  • Experimental damping assessment

Citer dette

Gres, S., Fejerskov, M., Ibsen, L. B., & 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 (s. 4045-4054). Leuven: KU Leuven, Department of Mechanical Engineering, PMA.
Gres, Szymon ; Fejerskov, Morten ; Ibsen, Lars Bo ; Damkilde, Lars. / Experimental damping assessment of a full scale offshore mono bucket foundation. 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
@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",
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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; Damkilde, Lars.

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 proceedingKonferenceartikel i proceedingForskningpeer review

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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

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KW - Full scale

KW - Experimental damping assessment

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