Session: 09-01-13 Novel and Hybrid Offshore Wind Concepts

Paper Number: 80493

80493 - Dynamic Analysis of an Integrated Structure Consists of Jacket Offshore Wind Turbine and Aquaculture Cage 

The intensive exploration of marine resources is announced by Chinese government. The abundant offshore wind energy in the water depth of 30-50 m shall be developed in the offshore regions in China during the next decades, which are also feasible areas for marine farming. In view of structural safety and economic benefits, a multi-utility offshore structure is proposed in the study with the intension of realizing the ocean resources with high quality exploration. The recommended offshore structure is consists of a jacket-type offshore wind turbine (OWT) and an aquaculture cage. In order to investigate the influence of the additional aquaculture cage, the finite element models of the integrated offshore structure is established in SACS, the hydrodynamic model of the aquaculture cage is equivalented as Morison model. The comparisons of the dynamic characteristics and structural responses with the original jacket OWT are carried out. There are the remarkable discrepancies between the natural modes of the integrated offshore structure and jacket OWT due to the added aquaculture cage. Meanwhile, the remarkably increased hydrodynamic forces on the integrated offshore wind turbine under wave and current loads are observed. The influence of aquaculture cage on the dynamic characteristics and hydrodynamics of the integrated offshore structure are discussed.

Presenting Author: Na Li State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology

Authors:

Na Li State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
Haisheng Zhao State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
Wei Shi State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
Wenhua Wang State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
Xin Li State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology