Fragility analysis of steel and concrete wind turbine towers

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Title: Fragility analysis of steel and concrete wind turbine towers
Authors: Quilligan, Aidan
O'Connor, Alan
Pakrashi, Vikram
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Date: Mar-2012
Online since: 2019-05-14T07:31:31Z
Abstract: The tower is an essential component of a wind turbine assembly with its cost amounting to approximately 30% of the overall turbine costs for onshore installations. This paper investigates the relative performance of steel and concrete tower solutions for a selection of heights and wind speeds by means of a flapwise numerical model. For each case, elements of a baseline 5. MW wind turbine are used to model the components supported by the tower. The Lagrangian approach is used to establish the equations of motion of the dynamic system, allowing for the coupling of the tower and the system of blades. The analysis is performed for a range of typical tower heights from 88 to 120. m. Comparison of the relative performance of the two tower solutions is presented using fragility curves. This illustrates the probabilistic characteristics of limit state exceedance as a function of wind loading.
Funding Details: Irish Research Council for Science, Engineering and Technology
Type of material: Journal Article
Publisher: Elsevier
Journal: Engineering Structures
Volume: 36
Start page: 270
End page: 282
Copyright (published version): 2011 Elsevier
Keywords: Wind turbine towersConcreteSteelFragility curvesLagrangianModal analysisFlapwise vibration
DOI: 10.1016/j.engstruct.2011.12.013
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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