流体机械2017，Vol.45Issue(8)：19-23,5.DOI:10.3969/j.issn.1005-0329.2017.08.005
基于流固耦合的风力机叶片裂纹扩展机理研究
Study on Crack Growth Mechanism of Wind Turbine Blade Based on Fluid Solid Coupling
摘要
Abstract
In view of the severity of wind turbine working environment and the complexity of wind turbine blade crack growth.In this paper,by using computational fluid dynamics (CFD) and fracture mechanics simulation analysis,wind load is used as the main load of crack propagation,the mechanism of wind turbine blade crack propagation was simulated by data transfer problem of fluid solid coupling interface.A semi elliptical three-dimensional crack with different initial dimensions is embedded on the surface of the blade,and the stress intensity factor of three dimensional crack under different wind speeds is calculated.Dynamic crack growth mechanism of crack at different initial sizes under different wind speeds is analyzed.The results show that the initial size of the crack and the size of the wind load have effects on the crack propagation rate and direction of the blade,and the unsteady probability of crack growth under high wind speed increases.关键词
风力机叶片/流固耦合/三维裂纹/裂纹扩展Key words
wind turbine blade/fluid structure interaction/three dimensional crack/crack propagation分类
机械制造引用本文复制引用
周勃,张亚楠,王琳琳,陈长征..基于流固耦合的风力机叶片裂纹扩展机理研究[J].流体机械,2017,45(8):19-23,5.基金项目
国家自然科学基金项目(51575361) （51575361）
中国博士后科学基金项目(2014M560220) （2014M560220）
辽宁省百千万人才工程项目(2015049) （2015049）
