考虑叶片离心刚化效应的风力机塔架风振反应分析  

WIND-INDUCED RESPONSE ANALYSIS OF WIND TURBINE TOWER CONSIDERING THE CENTRIFUGAL STIFFENING EFFECT OF BLADE

作　　者：陈小波[1] 李静[1] 陈健云[1,2] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《工程力学》2010年第1期240-245,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(50708015);教育部新世纪优秀人才计划项目(NCET-06-0270)

摘　　要：为分析风轮作用力和叶片刚化对风力机塔架风振反应的影响,研究了考虑叶片刚化效应时风力机塔架的风振反应。采用谐波叠加法模拟了风力机塔架和叶片的脉动风速时程,在理论上推导了考虑离心刚化效应的叶片振动方程。该文分3种工况计算了叶片与塔架在风荷载作用下的动力反应,并对比了3种工况的塔架顶点位移及其相对误差。结果分析表明:叶片剪力对塔架的动力反应影响较大,叶片刚化效应减小了塔架的风振反应,在动力计算过程中应考虑刚化效应的影响。To analyze the influence of the blades force and the blade centrifugal stiffening effect on wind-induced response of wind turbine tower, the wind-induced response of wind turbine tower was investigated, with the centrifugal stiffening effect taken into account. The fluctuating wind velocity time series of wind turbine were simulated by the harmony superposition method, and the theoretical vibration equation of blade involving centrifugal stiffening effect was derived. The wind-induced responses of blade and tower were calculated in three conditions, and the tower top displacement and the relative errors in each condition were recorded. The results show that the blades force on tower has great effect on the dynamic response of tower, and the wind-induced response of tower was reduced by centrifugal stiffening effect. Hence, the influence of the centrifugal stiffening effect should be considered in the dynamic calculation.

关 键 词：离心刚化效应 叶片 塔架 风振反应 谐波叠加法 

分 类 号：TU311.3[建筑科学—结构工程]