Residual strength assessment of wind turbine rotor blade composites under combined effects of natural aging and fatigue loads

被引：9

作者：

Gao, Jian-Xiong ^{[1
]}

An, Zong-Wen ^{[2
]}

Ma, Qiang ^{[2
]}

Bai, Xue-Zong ^{[2
]}

机构：

[1] Xinjiang Univ, Postdoctoral Res Stn Elect Engn, Sch Mech Engn, Urumqi 830046, Peoples R China

[2] Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China

来源：

EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY | 2020年 / 22卷 / 04期

基金：

中国国家自然科学基金;

关键词：

wind turbine rotor blade; natural aging; fatigue loads; residual strength; composite material; FIBER-REINFORCED COMPOSITES; RELIABILITY-ANALYSIS; MODEL; DAMAGE; PREDICTION; TESTS; LIFE;

D O I：

10.17531/ein.2020.4.3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the combined effects of natural aging and fatigue loads are considered to assess the residual strength of wind turbine rotor blade composites under actual service environments. Firstly, a comprehensive environmental factor (CEF) methodology is adopted to quantify the combined effects of environmental factors on residual strength. Meanwhile, the artificial accelerated aging test data are used to determine the weight coefficients of the CEF. Subsequently, a two-variable function is presented to characterize the relationship among residual strength, aging time and the CBF. The natural aging test data are utilized to estimate the unknown parameters of the two-variable function. Finally, the combined effects of natural aging and fatigue loads are considered, and a residual strength model is proposed to analyze the strength degradation behaviors of the wind turbine rotor blade composites. The results indicate that fatigue loads have negative effect on the residual strength, while natural aging has both positive and negative effects on the residual strength.

引用

页码：601 / 609

页数：9

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