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research-article

Coupled Dynamics of a Flexible Horizontal Axis Wind Turbine with Damaged Blades: Experimental and Numerical Validations

[+] Author and Article Information
Mohamed Amin Ben Hassena

Res. Lab. of Electro-Mechanical Systems, National Eng. School of Sfax, University of Sfax, TUNISIA
b.hassena.med.amin@gmail.com

Fehmi Najar

Applied Mechanics and Systems Res. Lab., Tunisia Polytechnic School, University of Carthage, TUNISIA
fehmi.najar@gmail.com

Slim Choura

Res. Lab. of Electro-Mechanical Systems, National Eng. School of Sfax, University of Sfax, TUNISIA
s_choura@yahoo.com

Fathi H. Ghorbel

Department of Mechanical Engineering, Rice University, USA
ghorbel@rice.edu

1Corresponding author.

ASME doi:10.1115/1.4037529 History: Received July 21, 2016; Revised July 04, 2017

Abstract

In this paper, we propose a new coupled dynamical model of a Horizontal Axis Wind Turbine (HAWT). The proposed model takes into consideration the dynamic coupling of the flexible tower with both bending and torsion of the flexible blades. This model also accounts for the dynamics of an additional point mass located in one of the blades to simulate a crack. In addition, a Finite Element Model analysis along with an experimental study are conducted in this research to validate the modal analysis of a HAWT prototype. Data from the analytical, numerical and experimental investigations were collected and showed comparable findings. Using the analytical model, the modal analysis and the steady state response of the HAWT prototype are performed for two configurations: with and without a crack. In this paper, we also propose a new model-based technique for the detection of cracks in the HAWT.

Copyright (c) 2017 by ASME
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