Open Access

ARTICLE

Scour Effect on Dynamic Characteristics and Responses of Offshore Wind Turbines

Dongyue Tang¹, Ming Zhao^{1, *}

1 College of Civil Engineering, Tongji University, Shanghai, China.

* Corresponding Author: Zhao Ming. Email: .

(This article belongs to the Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)

Computer Modeling in Engineering & Sciences 2020, 124(2), 433-457. https://doi.org/10.32604/cmes.2020.09268

Received 28 November 2019; Accepted 21 April 2020; Issue published 20 July 2020

Abstract

The monopile foundation is the main form of offshore wind turbine foundation, and its surrounding scouring pit will reduce the constraints of the soil on the piles, which makes wind turbine foundation instability a key issue affecting the structural safety of offshore wind turbines. In previous studies, the rotating rotor and control system are neglected when studying the influence of scour on the offshore wind turbine structure. In this paper, the numerical model of the blade-tower-monopile integrated offshore wind turbine is established, and the influence of scour on the dynamic characteristics of wind turbine is obtained considering parameters, such as blade azimuth, pitch angle, rotor speed, and soil stiffness. After calculating wind load by using the modified Blade Element Momentum theory, the impact of scour on the wind-induced response of a monopile wind turbine is achieved, considering control system and aeroelastic coupling. Therefore, a reference method is proposed for estimating scour depth according to the monopile foundation offshore wind turbine wind-induced response.

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Citations