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.

Dynamic prediction fatigue life of composite wind turbine blade

2015 ◽  
Vol 18 (3) ◽  
pp. 673-691 ◽  
Author(s):  
Samir Lecheb ◽  
Abdelkader Nour ◽  
Ahmed Chellil ◽  
Hamza Mechakra ◽  
Hicham Ghanem ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Dynamic Prediction

A Method of Estimating Wind Turbine Blade Fatigue Life and Damage using Continuum Damage Mechanics

2011 ◽  
Vol 21 (6) ◽  
pp. 810-821 ◽  
Author(s):  
A. Movaghghar ◽  
G. I. Lvov
Keyword(s):  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Damage Mechanics ◽  
Elastic Strain Energy ◽  
Continuum Damage Mechanics ◽  
Wind Turbine Blade ◽  
Mode Shapes ◽  
Ansys Analysis ◽  
Natural Resonance Frequency

In this article, an energy-based model for predicting fatigue life and evaluation of progressive damage in a full composite wind turbine blade is proposed. Itis based on the assumption that the damage growth rate in a composite material depends on the maximum value of elastic strain energy per cycle. Design, finite element modeling, and dynamic analysis of the blade have been performed using ANSYS software. The first five natural frequencies and mode shapes of the blade were calculated and dangerous nodes in the critical location were determined using the modal and harmonic analysis techniques. Obtaining critical stresses from ANSYS analysis, fatigue life of the blade at the first natural resonance frequency was estimated by the model. Results showed that the calculated life of the analyzed blade could meet the design requirement.

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.

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.

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