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中文摘要：
建立新一代超大功率风力机系统,考虑风轮离心力的＂风轮-机舱-塔体-基础＂一体化有限元模型,输入采用基于谐波叠加法和叶素-动量理论计算的考虑风轮旋转、塔架-风轮模态和气动相干效应的脉动风荷载;结合考虑结构背景、共振及耦合项的风振精细化计算方法,研究风力机塔-轮系统的风振响应、等效静力风荷载（ESWL）和动力放大系数的分布特性.结果表明：新一代大型风力机塔-轮系统的风振呈现多模态耦合、多振型响应和多目标等效3个显著特征,其中塔架中上部和风轮由共振响应主导,塔架底部背景和共振响应相当,背景和共振交叉项影响不能忽略.
英文摘要：
The integrated finite element model consisting of the rotor, the nacelle, the tower and the basis of 5 MW new generation wind turbine system was established. The harmony superposition method and blade-element momentum （BEM） theory were used to calculate the simulation of wind loads on tower-rotor system, which considers the rotational effect, tower-blades modal and aerodynamic interaction effects. The wind induced responses, equivalent static wind load （ESWL） and dynamic amplified coefficients of wind turbine tower-rotor system were analyzed combined with the calculating method, which could consider the coupled effect between the resonant modes, and the cross term of resonant and background responses. Results showed that the wind induced responses and ESWL were characterized with complicated wind loads, multimode buffeting responses, and multiple equivalent objectives for equivalent static wind loads. The resonant component had more contribution to wind-induced response and ESWL in middle upper part and wind rotors. The background responses were similar with the resonant responses in the bottom tower. Cross term between background and resonant components had important effect.
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