Structural Strength Analysis for Composite Hub Cover of Wind Turbine
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摘要: 利用有限元分析理论和MSC.Patran/Nastran软件对MW级风力发电机组的复合材料导流罩进行结构强度分析。通过分析壳单元特点,选择shell单元为导流罩的建模单元;对流线型导流罩的风载分布系数进行研究,根据第3类风区的特点和导流罩各部分的曲率半径划分区域并计算相关载荷;综合考虑风载、雪载、冰载等因素的影响,设计出相应的工况;对复合材料导流罩进行强度分析,得到最大应力和变形。计算结果表明:复合材料导流罩不会发生分层破坏。Abstract: The structure strength for composite hub-cover of a mega-watt wind turbine is analyzed based on the FEA(finite element analysis) theory using MSC.Patran /Nastran software.Shell element is chosen to build up the FEAmodel of hub-cover by the analysis of various 2D elements.The wind-load distribution coefficients are studied forthe streamlined shape of hub-cover, and each load is calculated according to the property of the third wind region aswell as different curvature radius of the hub-cover.Wind-load, snow-load and ice-load are all concerned to designthe corresponding load-case.To get the maximum stress and displacement, static strength of the composite hub-cover is analyzed and the result shows that the hub-cover won't be destroyed under the ultimate load.
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Key words:
- hub-cover /
- composite materials /
- load-case design /
- finite element analysis
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