风电叶片叶根连接陶瓷垫圈对螺栓疲劳性能的影响研究

STUDY OF THE IMPACT ON WIND POWER BLADE ROOT BOLT FATIGUE PROPERTY OF CERAMIC GASKET

首先利用Catia软件建立了风电叶片叶根模型,在专业网格划分工具中划分网格,采用商用有限元软件进行分析,结合有限元分析结果和载荷Markov矩阵,通过Matlab软件编写的疲劳损伤程序进行损伤分析,最终得到螺栓的损伤数值。比较了螺母下陶瓷垫圈存在与不存在时的螺栓应力,并分析了垫圈的存在对螺栓疲劳性能的影响。仿真结果表明采用螺母下放置陶瓷垫圈的方法可使螺栓损伤显著降低,疲劳性能有效提高。

Wind power blade root model was built up using Catia,meshed by professional mesh tool,analyzed by commercial FEM software,based on which the FEA result is eventually got. Using the FEA result and load Markov matrix,the root bolt＇s damage can be obtained by fatigue code in Matlab. In this article,bolt stress are compared between with and without ceramic gasket,and the impact on bolt fatigue property of gasket is explored. It is indicated that bolt damage is obviously reduced by putting ceramic gasket under the nut from the result of simulation,while fatigue life is effectively elongated.