工程科学学报2017，Vol.39Issue(9)：1453-1462,10.DOI:10.13374/j.issn2095-9389.2017.09.020
全风向来流非高斯风场风机疲劳寿命可靠性分析
Reliability analysis of the fatigue life of wind turbines under a non-Gaussian wind field with a full-direction inflow
摘要
Abstract
Using the Hermite moment model, three types of wind fields with different probability characteristics, namely the Gaussian, hardening non-Gaussian, and softening non-Gaussian processes, were generated via the Kaimal spectrum for a typical wind turbine under operational conditions. Reliability analysis of the fatigue life of the wind turbine was performed by taking tower base con-nections as an example with consideration of the joint probability density distribution of the wind direction and mean wind speed. The dynamic response was calculated by an aerodynamic model of the blade and multi-body dynamics, and the time-and frequency-domain characteristics of the response were analyzed. Using linear damage accumulation theory and the Paris equation, the fatigue crack initia-tion life and crack growth life of the turbine were discussed in detail. Fatigue estimation shows that the crack initiation life of the tur-bine is more sensitive to non-Gaussian winds, whereas its crack propagation life is less sensitive to the non-Gaussian characteristics of wind load. The influence of the non-Gaussian characteristics of wind load on the fatigue damage of the wind turbine should be consid-ered. In terms of the full-direction inflow, the failure positions of the crack initiation and propagation stages are identical and in the dominant wind direction.关键词
全风向/非高斯性/雨流计数法/裂纹形成/裂纹扩展Key words
full-direction inflow/non-Gaussian characteristic/rain-flow counting method/crack initiation/crack propagation分类
建筑与水利引用本文复制引用
双妙,宋波..全风向来流非高斯风场风机疲劳寿命可靠性分析[J].工程科学学报,2017,39(9):1453-1462,10.基金项目
国家自然科学基金资助项目(51178045) （51178045）
北京科技大学与台北科技大学专题联合研究计划资助项目(TW201601) （TW201601）
高校2016年度引智项目资助项目(110000201420160126) （110000201420160126）
