基于ANSYS的风机轮毂的强度分析及优化设计

摘要

在风机轮毂减重设计的研究中,针对传统变截面设计生产难度大并未予疲劳寿命分析的问题,提出一种采用在轮毂主体上钻孔的方法来减轻风机轮毂重量.首先借助于大型通用有限元分析软件ANSYS,对风力发电机组的轮毂进行强度分析并在此基础上对其进行了结构优化设计.在满足轮毂强度、刚度要求的前提下,对比分析多个计算结果得到最佳优化方案,再利用轮彀S-N曲线对优化方案进行了疲劳强度和寿命分析.通过轮毂的钻孔设计不仅减轻了轮毂的自重,而且满足材料的强度和寿命要求.仿真结果表明钻孔减重的方法是有效可行的,并且提高了主轴、塔筒以及风电机组整体结构的强度性能.%In the research of weight loss design for the wind turbines hub, for the problem that variable cross-section designs are difficult to produce and does not have fatigue life analysis, this paper presented a way of drilling on the main part of the hub to reduce the weight of the fan wheel. First, the large-scale finite element analysis software ANSYS was used to analyze the strength of the wind turbine hub and then the optimization was carried out for the structure of the hub. To meet the hub strength and stiffness requirements, by comparing multiple analysis results, the best optimization was acquired, and S-N curve of the hub was used to make a strength and fatigue life analysis for the optimize programs. The wheel hub design of drilling not only reduces the weight but also meets the material requirements of strength and life. Simulation experiments and analysis results show that the drilling method of weight loss is effective and practicable, and the structural strength of spindles, the tower and the entire structure can be increased.