A study of dynamic response of a wind turbine blade based on the multi-body dynamics method

In this paper, the entity model of a 1.5 MW offshore wind turbine blade was built by Pro/Engineer software. Fluid flow control equations described by arbitrary Lagrange–Euler (ALE) were established, and the theoretical model of geometrically nonlinear vibration characteristics under fluid–structure interaction (FSI) was given. The simulation of offshore turbulent wind speed was achieved by programming in Matlab. The brandish displacement, the Mises stress distribution and nonlinear dynamic response curves were obtained. Furthermore, the influence of turbulence and FSI on blade dynamic characteristics was studied. The results show that the response curves of maximum brandish displacement and maximum Mises stress present the attenuation trends. The region of the maximum displacement and maximum stress and their variations at different blade positions are revealed. It was shown that the contribution of turbulence effect (TE) on displacement and stress is smaller than that of the FSI effect, and its extent of contribution is related to the relative span length. In addition, it was concluded that the simulation considering bidirectional FSI (BFSI) can reflect the vibration characteristics of wind turbine blades more accurately.

Download Full-text

Aspects of the Dynamic Response of a Small Wind Turbine Blade in Highly Turbulent Flow: Part 2 Predicted Blade Response

Wind Engineering ◽

10.1260/030952407783123042 ◽

2007 ◽

Vol 31 (4) ◽

pp. 217-231 ◽

Cited By ~ 4

Author(s):

S.V.R. Wilson ◽

P.D. Clausen

Keyword(s):

Dynamic Response ◽

Turbulent Flow ◽

Wind Turbine ◽

Turbine Blade ◽

Wind Turbine Blade ◽

Small Wind Turbine ◽

Flow Part

Download Full-text

Flutter Limit Investigation for a Horizontal Axis Wind Turbine Blade

Journal of Vibration and Acoustics ◽

10.1115/1.4039402 ◽

2018 ◽

Vol 140 (4) ◽

Cited By ~ 9

Author(s):

Mennatullah M. Abdel Hafeez ◽

Ayman A. El-Badawy

Keyword(s):

Dynamic Response ◽

Wind Turbine ◽

Turbine Blade ◽

Nonlinear Partial Differential Equations ◽

Stability Limit ◽

Wind Turbine Blade ◽

Horizontal Axis ◽

Horizontal Axis Wind Turbine ◽

Centrifugal Stiffening ◽

Aeroelastic Model

This work presents a new aeroelastic model that governs the extensional, chordwise, flapwise, and torsional vibrations of an isolated horizontal axis wind turbine blade. The model accounts for the sectional offsets between the shear, aerodynamic, and mass centers. The centrifugal stiffening effects are also accounted for by including nonlinear strains based on an ordering scheme that retains terms up to second-order. Aerodynamic loading is derived based on a modified Theodorsen's theory adapted to account for the blade rotational motion. A set of four coupled nonlinear partial differential equations are derived using the Hamiltonian approach that are then linearized about the steady-state extensional position. The finite element method (FEM) is then employed to spatially discretize the resulting equations with the aim of obtaining an approximate solution to the blade's dynamic response, utilizing state space techniques and complex modal analysis. Investigation of the blade's flutter stability limit is carried out. Effects of parameters such as wind speed and blade sectional offsets on the flutter limit and dynamic response are also investigated.

Download Full-text