Fragility reduction of offshore wind turbines using tuned liquid column dampers

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Hemti, Arash and Oterkus, Erkan and Barltrop, Nigel (2019) Fragility reduction of offshore wind turbines using tuned liquid column dampers. Soil Dynamics and Earthquake Engineering, 125. pp. 1-16. 105705. ISSN 0267-7261 (https://doi.org/10.1016/j.soildyn.2019.105705)

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Abstract

High flexibility of offshore wind turbines (OWTs) makes them vulnerable to excessive vibrations. This paper studies vibration control of offshore wind turbines induced by multi-hazard excitations. A model consisting of entire offshore wind turbine foundation and tower controlled by tuned liquid column dampers(TLCD) considering nonlinear soil pile interaction is established. The model is subjected to wave, wind, and seismic loading. The effect of severity of earthquake on the performance of the structural control device is investigated. A fragility analysis based on acceleration capacity thresholds is performed to estimate reliability improvement using the structural control devices. The fitted fragility functions based on multiple stripes analysis are constructed and compared with the empirical cumulative distribution curves. The results suggest that the use of an optimal TLCD with a mass ratio of 2.5% reduces the fragility of the system by as much as 6% and 12% for operational and parked conditions, respectively.

ORCID iDs

Hemti, Arash, Oterkus, Erkan ORCID logoORCID: https://orcid.org/0000-0002-4614-7214 and Barltrop, Nigel;
  • Item type:Article
    ID code:68182
    Dates:
    Date
    Event
    1 October 2019
    Published
    14 June 2019
    Published Online
    28 May 2019
    Accepted
    17 September 2018
    Submitted
    Notes:© 2019 Elsevier Ltd. All rights reserved Arash Hemmati, Erkan Oterkus, Nigel Barltrop, Fragility reduction of offshore wind turbines using tuned liquid column dampers, Soil Dynamics and Earthquake Engineering, Volume 125, 2019, 105705, https://doi.org/10.1016/j.soildyn.2019.105705
    Subjects:Technology > Hydraulic engineering. Ocean engineering
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:03 Jun 2019 11:03
    Last modified:26 Nov 2024 01:14
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/68182
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