风轮和塔架耦合作用和旋转效应对大型风力机动态响应的影响  

INFLUENCES OF INTERACTION BETWEEN BLADES AND TOWER AND ROTATION EFFECT ON DYNAMIC RESPONSE FOR THE LARGE-SCALE WIND TURBINE

作　　者：张建平[1,2] 施锋锋 

机构地区：[1]上海电力学院能源与机械工程学院,上海200090 [2]上海电力学院上海市电力材料防护与新材料重点实验室,上海200090

出　　处：《机械强度》2017年第2期273-278,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(11572187);上海市教育委员会科研创新项目(14ZZ154);上海市科学技术委员会项目(14DZ2261000;13160501000)资助~~

摘　　要：通过自行编制的风剪切和Davenport脉动风谱程序建立了更加贴近实际工况的风场,以UG建立的5 MW大型风力机实体模型作为研究对象,基于单向流固耦合技术(UFSI),运用有限元软件Ansys数值模拟了不同转速下考虑风轮-塔架耦合作用的风力机结构动态响应。结果表明:叶轮与塔架耦合作用会显著增大叶片与塔架的最大位移和应力响应值;耦合作用使得叶片最大应力由相对翼展0.5处移动到0.7处且塔架出现多处应力极值;需考虑结构间耦合与旋转效应的联合作用时,才能得到风机准确的运行参数。The actual working wind filed was established by the self-designed programs of wind shear and Davenport wind spectrum. Taking the 5MW wind turbine built in UG as the research object, the dynamic response of the wind turbine suffered interaction between blades and tower under different rotating speed was simulated by ANSYS based on unidirectional fluid- structure interaction （UFSI）. The results indicate that owing to the interaction effect between blades and tower, the maximum displacement and stress of the blades and tower increase to a certain extent. The coupling effect leads to the phenomenon that the maximum stress of the blades changes its location from relative span 0.5 to 0. 7, and several maximum stresses appear in the tower area. It＇ s necessary to consider the combined effect between the structural coupling and rotation to obtain the accurate operating parameters of the wind turbine.

关 键 词：风轮 塔架 流固耦合 旋转效应 动态响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]