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Volume 18, Issue 35 (5-2022)                   Marine Engineering 2022, 18(35): 47-59 | Back to browse issues page

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Pahlavannejad Tabarestani Y, Naghipour M. Numerical investigation of structural behavior of fixed offshore wind turbines with CFDST sections based on hybrid monopile-footing foundation. Marine Engineering 2022; 18 (35) :47-59
URL: http://marine-eng.ir/article-1-933-en.html
Numerical investigation of structural behavior of fixed offshore wind turbines with CFDST sections based on hybrid monopile-footing foundation
Yasin Pahlavannejad Tabarestani1 , Morteza Naghipour * 1
1- Babol Noshirvani University of Technology
Abstract:   (2060 Views)
Offshore wind energy is one of the main sources of renewable energy, which has led to the increasing expansion of offshore wind farms worldwide.One of the major challenges for offshore wind projects is the cost of construction of the foundation, which, depending on the location and type of wind turbine, accounts for about 16 to 34% of the total cost.Therefore, proper design of foundations is very important to ensure the performance of offshore wind turbines.The foundation proposed in this research includes a hybrid monopile-footing foundation in which CFDST sections have been used in monopile instead of conventional steel sections.Dynamic analysis of the foundation under environmental loads has been performed using finite element method by ABAQUS  software. The results show that the use of CFDST sections, in addition to being able to reduce the diameter of the monopile, add a circular footing to the monopile, creates more lateral stiffness for the monopile at mud level and also reduces its lateral displacement.Also, by comparing the natural frequencies of wind turbines based on the proposed foundation, it was found that these structures are within the allowable frequency range and do not pose a risk of resonance.
Keywords: Offshore wind turbine, Hybrid foundation, CFDST sections, Finite element analysis
Full-Text [PDF 2405 kb]   (822 Downloads)    
Type of Study: Research Paper | Subject: Offshore Structure
Received: 2021/10/4 | Accepted: 2022/04/6
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