Non-linear ultimate strength and stability limit state analysis of a wind turbine blade

Wind Energy ◽  
2015 ◽  
Vol 19 (5) ◽  
pp. 825-846 ◽  
Author(s):  
Malo Rosemeier ◽  
Peter Berring ◽  
Kim Branner
Keyword(s):  
Wind Turbine ◽  
Ultimate Strength ◽  
Turbine Blade ◽  
Limit State ◽  
Stability Limit ◽  
Wind Turbine Blade ◽  
Limit State Analysis ◽  
Non Linear ◽  
State Analysis

Non-linear dynamic response of a wind turbine blade

1979 ◽  
Vol 63 (2) ◽  
pp. 265-286 ◽  
Author(s):  
I. Chopra ◽  
J. Dugundji
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Linear Dynamic ◽  
Non Linear

Flutter Limit Investigation for a Horizontal Axis Wind Turbine Blade

2018 ◽  
Vol 140 (4) ◽  
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.

scholarly journals Dynamic Instability of a Wind Turbine Blade Due to Large Deflections: An Experimental Validation

2020 ◽  
Vol 66 (9) ◽  
pp. 523-533
Author(s):  
Andres Lopez-Lopez ◽  
Jose Billerman Robles-Ocampo ◽  
Perla Yazmin Sevilla-Camacho ◽  
Orlando Lastres-Danguillecourt ◽  
Jesús Muniz ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Experimental Validation ◽  
Dynamic Instability ◽  
Turbine Blades ◽  
Wind Turbine Blade ◽  
Large Deflections ◽  
Wind Turbine Blades ◽  
Non Linear ◽  
Linear Behaviour

Wind turbine blades are designed to be thin and flexible elements. Because unstable dynamic behaviour can affect the life of the rotor, it is crucial to understand the instability of non-linear behaviour caused by large deflections. The present study undertakes both a stability analysis of the non-linear response and an experimental validation of a simplified model for a wind turbine blade based on a cantilever beam. The model is formulated taking into account large geometric deflections and assuming a Galerkin approach. The model is validated experimentally in a wind tunnel with aluminium beams of differing geometry. Analysis of the dynamic response using phase planes reveals that the degree of instability is related to the amplitude of the excitation and the stiffness characteristics.

Non-linear dynamic analysis of a wind turbine blade

2019 ◽  
Vol 42 (8) ◽  
pp. 727-737 ◽  
Author(s):  
R. Maktouf ◽  
M. Yangui ◽  
T. Fakhfekh ◽  
R. Nasri ◽  
M. Haddar
Keyword(s):  
Dynamic Analysis ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Linear Dynamic ◽  
Non Linear

Noise analysis of the wind turbine blade

2013 ◽  
Author(s):  
Gwochung Tsai ◽  
Yita Wang ◽  
Yuhchung Hu ◽  
Jaching Jiang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Noise Analysis ◽  
Wind Turbine Blade
Sign in / Sign up

Export Citation Format

Share Document