Fragility reduction of offshore wind turbines using tuned liquid column dampers
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)
Preview |
Text.
Filename: Hemmati_etal_SDEE_2019_Fragility_reduction_of_offshore_wind_turbines_using_tuned_liquid_column_dampers.pdf
Accepted Author Manuscript License: Download (3MB)| Preview |
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: https://orcid.org/0000-0002-4614-7214 and Barltrop, Nigel;-
-
Item type: Article ID code: 68182 Dates: DateEvent1 October 2019Published14 June 2019Published Online28 May 2019Accepted17 September 2018SubmittedNotes: © 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: 28 Sep 2024 14:00 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/68182