文档介绍：摘要
轮毂是风力发电机中连接主轴和叶片的关键部件,承担抵抗风载、传递转矩的作用,对轮毂进行精确的强度分析尤为重要。采用联合分析的方法,利用UG软件和ANSYS有限元分析软件对风力发电机轮毂进行了强度计算和受力分析。通过UG软件作出轮毂的模型图,根据作图的方法和步骤对模型图进行了参数化设计。并将UG模型图转化成CATTA格式再导入ANSYS分析软件中进行有限元分析。分析结果表明:该方法能够比较准确地反映轮毂受力和变形情况,与理论估算相比具有计算精确、轮毂结构布局合理、重量轻、修改方便等优点。
关键词:风力发电机;轮毂;有限元;参数化;网格
Abstract
Hub is a ponent linking principal axis with vane in wind turbines , bearing wind load and delivering torsion. Therefore , it is important to analyze accurately strength of the hub. Joint analysis, using UG software, and ANSYS finite element analysis software for wind turbine wheel and the mechanical analysis of the strength calculation. Made through the UG software model of the wheel, according to the method of mapping and the steps carried out on the model of the design parameters. UG model and into a format and then import CATTA analysis software ANSYS finite element analysis carried out. The results show that: the method to more accurately reflect the wheel force and deformation, compared with the theoretical calculation of accurate estimates, a reasonable wheel structure, light weight,convenient stress distribution of the hub in the SU T21000 wind turbine was calculated using BLADE and AN SYS software. The ultimate loads of the hub were obtained based on IEC standard and an equivalent model was built by multipoint constraint element s and equivalent simplified technology in analysis. The stress of the bolt was also checked. The analysis result s indicate that the hub and bolt s satisfy technical requirements. Experimental results show that the proposed scheme is valid and has the advantages of precisely optimizing structure and light pared with theoretical method.
Key words : Wind generators; wheel; finite element method; parameter; grid
目录
引言 3
第一章风力发电机及轮毂简介 5
风力发电机 6
轮毂 7
第二章轮毂的参数化设计 8
利用基本特征参数化建模 9
利用草图辅助参数化建模 10
基于特征定义和UG/OPEN GRIP的参数化建模 11
UG/OPEN GRIP简介 11
GRIP程序的开发和执行 11
创建几何模型及参数化 13
第三章有限元分析 17
UG模型的导入