Introduction In view of the irregular geometric shape, complex load and heavy weight of the nacelle of a permanent magnet direct drive wind turbine, it is necessary to optimize the analysis and design.
Method Based on the finite element analysis of the geometric parameters of the nacelle and the calculation results of the shape of the elbow, the finite element analysis was established.
Result After optimization, the maximum von Mises stress of the nacelle is reduced from 181 MPa to 173 MPa, and the stress is reduced by 4.4%, which meets the strength requirements. The weight of the nacelle is reduced by 14.2% from 52.7 tons to 45.2 tons.
Conclusion The research shows that the optimization effect is obvious, which provides a reference for the design and optimization method of such nacelle of wind turbine.
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