基于Davenport谱风机叶片旋转状态下的应力分析  

Stress analysis on wind turbine blade under rotating state based on Davenport spectrum

作　　者：张建平[1] 韩熠[1] 李冬亮[1] 任建兴[1] 胡丹梅[1] 

机构地区：[1]上海电力学院能源与机械工程学院,上海200090

出　　处：《沈阳工业大学学报》2014年第3期252-257,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(50706025;51201097);上海市优秀学科带头人计划(B类)资助项目(13XD1425200);上海市科学技术委员会资助项目(11160500600;11dz2281700;09DJ1400204);上海市教育委员会科研创新资助项目(14ZZ154;13ZZ130);上海市教育委员会曙光计划资助项目(09SG51);上海电力学院能机学院"十二五"内涵建设("085"工程)资助项目

摘　　要：为了确保风力机叶片安全可靠运行,对其进行了旋转工况下的应力分析.以UG建立的叶片实体模型为研究对象,运用更加贴近实际工况的Davenport风谱建立了近海风场,利用Newmark法求解了结构运动方程,并在与文献试验结果对比的基础上,数值模拟了叶片应力分布.研究结果表明,风力机叶片的位移响应与应力响应幅值均随来流风速的增加而增加,旋转速度和来流风速均对叶片在相对弦长和相对翼展方向上的最大mises应力变化趋势有明显影响,该结果可以为风力机叶片优化设计提供参考.In order to ensure the safe and reliable operation of wind turbine blade,the stress was analyzed under rotating condition. Through taking the blade solid model established with UG software as the research object,the offshore wind field was established with Davenport wind spectrum closer to the actual working conditions,and the structure motion equation was solved with Newmark method. On the basis of comparing with the test results from the references,the blade stress distribution was numerically simulated. The results indicate that with increasing the incoming wind speed,the amplitudes of both displacement and stress response for wind turbine blade increase. In addition,both rotational speed and incoming wind speed have a significant influence on the variation trend of the maximum mises stress in both relative chord length and relative wingspan directions of blade. The present results can provide the reference for the optimization design of wind turbine blade.

关 键 词：风力机叶片 Davenport风谱 旋转工况 来流风速 实体模型 应力分布 Newmark方法 相对翼展 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]