风力发电机组塔筒的横向振动分析

摘要

结合有限元方法和工程计算对风力发电机组塔筒的横向振动进行分析.通过塔筒固有频率和风振频率的对比,判断塔筒容易发生共振的区域.给出并分析塔筒发生横向振动时塔顶最大位移、惯性力和特征弯矩的简化计算方法,并给出算例.计算了塔筒发生横向振动时的疲劳损伤.结果表明塔筒底部容易因横向振动而发生共振.%Transverse vibration for wind turbine tower was analyzed combined with finite element method and theoretical computation. It estimated the resonance region of tower by contrasting natural frequency and wind vibration frequency. It showed and analyzed the simple computation function for the maximal amplitude, the inertial force and characteristic moments when tower vibrated in the transverse direction. It also showed examples. Fatigue damage for tower which vibrated in transverse direction was calculated. The results showed that resonance was easy to occur at the bottom of tower in transverse vibration.