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

被引：25

作者：

Movaghghar, A. ^{[1
]}

Lvov, G. I. ^{[1
]}

机构：

[1] Kharkov State Polytech Univ NTU KHPI, Dept Dynam & Strength Machines, UA-61002 Kharkov, Ukraine

来源：

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS | 2012年 / 21卷 / 06期

关键词：

composite materials; damage mechanics; fatigue life; fracture; natural frequency; vibration;

D O I：

10.1177/1056789511419693

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：810 / 821

页数：12