基于MSC.Patran风电机组轮毂的有限元分析

风力发电机组中，轮毂承载着复杂的气动载荷，利用经典力学很难仿真其应力的大小及分布.为得到较精准的轮毂受力状态，基于有限元软件HyperMesh对SUT 3000风电机组轮毂模型进行较规则的六面体网格划分，并在模型中引入GAP单元，利用MSC.Patran/Nastran作为分析平台对轮毂进行强度分析.静强度分析结果表明，轮毂的最大应力值（101MPa）小于许用应力，其强度满足设计需要.六面体单元和GAP单元的使用，缩短了CPU的分析时间并获得了较平滑的应力和应变分布云图.

Finite element analysis of wind turbine hub based on MSC.Patran

The hub in wind turbines bears complex aerodynamic loads, and it is difficult to simulate its stress value and distribution by the classical mechanics. In order to obtain the stress state of hub precisely, the regular hexahedral mesh partition for the hub model of the SUT 3000 wind turbine was conducted based on the finite element software HyperMesh. The GAP element was intruduced in the model, and the strength analysis of the hub was completed by using MSC. Patran/Nastran as analysis platform. The analysis results for the static strength show that the maximum stress of 101MPa for the hub is less than the allowable stress and the strength of the hub meets the design requirement. With using both hexahedral element and GAP element, the analysis time of CPU can be reduced, and the smoother stress and strain distribution cloud chart can be obtained.