scholarly journals FATIGUE LIFE OPTIMIZATION OF WIND TURBINE BLADE

2014 ◽  
Vol 03 (15) ◽  
pp. 843-850 ◽  
Author(s):  
Satishkumar V Tawade .
Keyword(s):  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade

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.

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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