Structural Dynamic Analysis of A Tidal Current Turbine Using Geometrically Exact Beam Theory

[+] Author and Article Information
Qi Wang

Siemens Wind Power Inc. 1050 Walnut Street Boulder, CO 80302-5142, USA

Pengkun Zhang

School of Naval Architecture and Civil Engineering Shanghai Jiaotong University Shanghai, 200240 China

Ye Li

State Key Laboratory of Ocean Engineering and Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, School of Naval Architecture and Civil Engineering Shanghai Jiaotong University Shanghai, 200240 China

1Corresponding author.

ASME doi:10.1115/1.4038172 History: Received September 08, 2016; Revised October 03, 2017


This paper presents a numerical study of the dynamic performance of a vertical axis tidal current turbine. Firstly, we introduce the geometrically exact beam theory along with its numerical implementation GEBT which are used for structural modeling. We also briefly review the variational asymptotic beam sectional analysis (VABS) theory and discrete vortex method with free-wake structure (DVM-UBC) which provide the one-dimensional (1D) constitutive model for the beam structures and the hydrodynamic forces, respectively. Then we validate the current model with results obtained by ANSYS using three-dimensional (3D) solid elements and good agreements are observed. We investigate the dynamic performance of the tidal current turbine including modal behavior and transient dynamic performance under hydrodynamic loads. Finally, based on the results in the global dynamic analysis, we study the local stress distributions at the joint between blade and arm by VABS. It is concluded that the proposed analysis method is accurate and efficient for tidal current turbine and has a potential for future applications to those made of composite materials.

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