摘要
橡胶材料的非线性力学特性直接影响到风力发电机弹性支承的减振性能。通过橡胶拉伸和压缩实验获得应力-应变数据,借助有限元软件对数据进行拟合,得到橡胶材料恰当的本构模型。依据弹性支承的实际使用工况,选用合理的橡胶材料模型参数,采用整体、四分之一截面和轴对称的三种模型进行计算结果的对比分析。并针对用四分之一模型分析风力发电机弹性支承的非线性垂向、横向刚度和固有频率等特性,通过试验;验证了有限元模型和计算方法的有效性。
The nonlinear mechanical property of rubbers can directly affect the vibration reduction performance of elastic supports of wind turbines.In this paper,the experimental data of rubber tension and compression tests is fitted by finite element analysis software,and an optimal rubber constitutive model is derived.According to the working condition of the elastic support,reasonable working parameters and material parameters of the rubbers are selected to establish the global model,a quarter of the model and the axisymmetric model for the elastic support of the wind turbines.Then,the three models are calculated and the results are compared carefully.The quarter of the model is selected to analyze the performances of the elastic support,such as the nonlinear vertical stiffness,lateral stiffness and natural frequencies and so on.The experimental results show that the finite element analysis is effective.The work is of significance for design of new elastic supports of wind turbines.
出处
《噪声与振动控制》
CSCD
2014年第4期209-213,共5页
Noise and Vibration Control
基金
江苏省工业支撑项目(项目编号:BE2011154)
关键词
振动与波
隔振
风力发电机
弹性支承
非线性
有限元分析
vibration and wave
vibration isolation
wind turbine
elastic support
nonlinear
finite element analysis
