Design and Trial of MW-Scale Wind Turbine Blade Fatigue Loading Control System

2014 ◽  
Vol 945-949 ◽  
pp. 1123-1128
Author(s):  
Yi Chun Wang ◽  
Jian Zhong Wu ◽  
Gao Hua Liao
Keyword(s):  
Control System ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Design Method ◽  
Frequency Control ◽  
Fatigue Loading ◽  
Wind Turbine Blade ◽  
Loading Test ◽  
Scanning Frequency ◽  
Novel Design

This study analyzed requirements of the wind turbine blade fatigue loading, and proposed a novel design method for blade fatigue loading control system. The hardware and software of the control system were designed. Frequency scanning, frequency control and amplitude tracking flow chart have been presented. A control system of the fatigue loading facility was built based on this investigation. The loading test of wind turbine blade has been completed. The data and curve acquired from the test prove that the control system could satisfy loading requirements.

Control Framework and Integrative Design Method for an Adaptive Wind Turbine Blade

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Hamid Khakpour Nejadkhaki ◽  
John F. Hall
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Design Method ◽  
Design Procedure ◽  
Wind Turbine Blade ◽  
Control Technique ◽  
Angle Distribution ◽  
Control Framework ◽  
Integrative Design

Abstract A control framework and integrative design method for an adaptive wind turbine blade is presented. The blade is adapted by actively transforming the twist angle distribution (TAD) along the blade. This can alleviate fatigue loads and improve wind capture. In this paper, we focus on wind capture. The proposed design concept consists of a rigid spar that is surrounded by a series of flexible blade sections. Each section has two zones of stiffness. The sections are actuated at each end to deform the TAD. A quasi-static control technique is proposed for the TAD. The controller sets the position of the blade actuators that shape the TAD during steady-state operation. A design procedure is used to define the required TAD as a function of the wind speed. This is based on an optimization procedure that minimizes the deviation between the actual TAD and that found in the aerodynamic design. The design inputs for this optimization problem include the stiffness for each zone of the section, and the actuator locations along the blade. Given the optimal TAD at each wind speed, the free position of the blade is established using a dynamic programming technique. The position is selected based on minimal actuation energy according to wind conditions at any installation site. The proposed framework is demonstrated using a National Renewable Energy Laboratory (NREL) certified wind turbine model with recorded wind data. An increase in efficiency of 3.8% with only a deviation of 0.34% from the aerodynamic TAD is observed.

Study on Wind Turbine Blade Design Method and Modeling Technology

2011 ◽  
Vol 88-89 ◽  
pp. 549-553
Author(s):  
Wen Xian Tang ◽  
Cheng Cheng ◽  
Yun Di Cai ◽  
Fei Wang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Design Method ◽  
Three Dimensional ◽  
Design Procedure ◽  
Wind Turbine Blade ◽  
Solid Model ◽  
Blade Design ◽  
Modeling Technology ◽  
Turbine Blade Design

According to the design procedure of wind turbine blade, a design method that can make CAD software joint used was brought up. Wilson method was used to design and calculate the main data of blade. On this basis, the three-dimensional solid model of wind turbine blade could get by using and playing the function of different CAD software. This study provided a reference for the design of wind turbine blade and other similar complicated structures, which settles the basis for the further analysis of blade.

Life prediction of wind turbine blades using multi-scale damage model

2021 ◽  
pp. 073168442199588
Author(s):  
Sepideh Aghajani ◽  
Mohammadreza Hemati ◽  
Shams Torabnia
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Fatigue Damage ◽  
Life Prediction ◽  
Turbine Blades ◽  
Damage Model ◽  
Fatigue Loading ◽  
Multiaxial Fatigue ◽  
Wind Turbine Blade ◽  
Wind Turbine Blades

Wind turbine blade life prediction is the most important parameter to estimate the power generation cost. Due to the price and importance of wind blade, many experimental and theoretical methods were developed to estimate damages and blade life. A novel multiaxial fatigue damage model is suggested for the life prediction of a wind turbine blade. Fatigue reduction of fiber and interfiber characteristics are separately treated and simulated in this research. Damage behavior is considered in lamina level and then extended to laminate; hence, this model can be used for multidirectional laminated composites. The procedure of fatigue-induced degradation is implemented in an ABAQUS user material subroutine. By applying the fatigue damage model, life is estimated by the satisfaction of lamina fracture criteria. This model provides a comprehensive idea about how damage happens in wind blades regarding a multi-axis fatigue loading condition.

scholarly journals Fatigue Life Evaluation For Wind Turbine Blade Based on Multistage Loading Accumulative Damage Theory

2015 ◽  
Vol 9 (1) ◽  
pp. 422-427 ◽  
Author(s):  
Zhang Leian ◽  
Huang Xuemei ◽  
Yuan Guangming
Keyword(s):  
Fatigue Life ◽  
Theoretical Calculation ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Characteristic Curve ◽  
Fatigue Loading ◽  
Resonant Mode ◽  
Wind Turbine Blade ◽  
Damage Theory ◽  
Multistage Loading

The fatigue life of MW wind turbine blade was assessed by applying theoretical calculation and test verification. Firstly, the fatigue characteristic curve of FRP material was obtained based on Palmgren-Miner damage theory. Furthermore, The fatigue life of Aeroblade1.5-40.3 wind turbine blade using multistage loading accumulative damage theory could be evaluated over 20 years accordingly. Then the coordinate system of wind turbine blade and its Bladed simulation model were set. By calculating fatigue loading, the moment distribution of fatigue test was obtained. Finally, the blade’s fatigue loading system driven by an eccentric mass was built and the multi-level amplitude resonant mode was adopted to carry on the test. Almost three months’ test results showed that the blade vibrating amplitude was constant, which illustrate the little variation of stiffness of loading point. The stable of stiffness could testify the fatigue life of blade was over 20 years. The results of in-site experiment were basically consistent with the theoretical calculation.

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