Dynamic Behavior of a Tension Leg Platform Offshore Wind Turbine under ‎Environmental Loads

Authors

1 Faculty of Engineering and Applied Science,‎ Memorial University of Newfoundland ‎, St. John’s, NL, Canada

2 School of Mechanical Engineering,Sharif University of Technology ‎,Tehran, Iran

3 Mathematical science Department ‎,Sharif University of Technology, Tehran, Iran

Abstract

In order to evaluate dynamic behaviors of floating offshore wind turbine, the authors consider two approaches. A numericalmethod is used to investigate a tension leg platform (TLP) offshore wind turbine response behavior in a parked condition. This code considers nonlinearities due to changes in the tension of tethers. The off-diagonal components of stiffness, damping and mass matrices are considered to calculate coupling. This code solves nonlinear equation of motion in each time step. However, in order to validate the data generated by the code, a scaled-down model was fully tested in the marine laboratory. The importance of these series of experiments is due to the fact that this model possesses a unique design and specification to which no other model can be compared. Measurement of three degrees of freedom under environmental loads is the goal of the experiments.[AE1]. Also, the results clearly show that direction of encountering waves is such an important factor. It can be concluded that wind loads can dampen oscillation of the model and it can prevent the impact of large loads on the tethers. The results show the discrepancy between experimental and numerical results in different degrees of freedom are acceptable enough

Keywords

Scientia Iranica
Volume 21, Issue 3
Transactions on Civil Engineering (A)
May and June 2014
Pages 480-491

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