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Concept Design of Jacket foundations for Offshore Wind Turbines in 10 steps

Jalbi, M Saleh and Bhattacharya, Suby (2020) Concept Design of Jacket foundations for Offshore Wind Turbines in 10 steps Soil Dynamics and Earthquake Engineering.

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Abstract

Simplified design procedures for offshore wind turbine (OWT) support structures are necessary in the concept and tender design stages for assessing the financial viability. Building upon the previous research on simplified monopile design, this paper presents a similar method to design jacket supported OWTs founded on piles or suction caissons. The method is based on the minimum and necessary data, namely the site characteristics (wind speed at reference height, wind turbulence intensity, water depth, wave height and wave period), turbine characteristics (rated power, rated wind speed, rotor diameter, cut-in and cut-out speed, mass of the rotor-nacelle-assembly) and ground profile (soil stiffness variation with depth and soil strength). A flowchart of the design process is also presented for visualisation of the rather complex multi-disciplinary analysis. Insights are given for 3 and 4 legged jackets. The calculation procedures that are required can be easily carried out either through a series of spreadsheets or simple hand calculations. An example problem emulating the design of jacket on piles is taken from literature to demonstrate the proposed calculation procedure. The data used for the calculations are obtained from publicly available sources and the example shows that the simplified method arrives at a similar foundation to the one reported.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Jalbi, M Salehm.jalbi@surrey.ac.uk
Bhattacharya, Subys.bhattacharya@surrey.ac.uk
Date : 5 August 2020
Uncontrolled Keywords : Offshore Wind Turbine, Natural Frequency, Jacket, Modes of Vibration
Additional Information : Embargo OK Metadata Pending
Depositing User : James Marshall
Date Deposited : 13 Aug 2020 10:03
Last Modified : 13 Aug 2020 10:03
URI: http://epubs.surrey.ac.uk/id/eprint/858403

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