Parameterized finite element model-based fan spindle structure optimization method

Abstract

The invention relates to the field of structural design of key parts of a wind generating set, in particular to a parameterized finite element model-based fan spindle structure optimization method, which comprises the following steps of: establishing a spindle system three-dimensional solid model and establishing a finite element model according to the model; establishing a first objective function to carry out topological optimization on the finite element model of the spindle system, and carrying out geometric reconstruction on the optimized model to obtain the reconstructed three-dimensional solid model of the spindle system; parameterizing the reconstructed three-dimensional solid model of the spindle system, and establishing the finite element model of the reconstructed spindle system; constructing a second objective function which enables the stress of the dangerous section of the spindle to reach an equal stress level and reduces the mass of the spindle, and solving the second objective function to obtain structural parameters of the reconstructed three-dimensional solid model of the spindle system. The design period can be greatly shortened, the rigidity of the fan spindlecan be effectively improved, the quality of the fan spindle is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of structural design of key components of a wind power generating set, in particular to a method for optimizing the structure of a main shaft of a wind turbine based on a parameterized finite element model. Background technique [0002] As the main shaft of the key load-carrying and transmission components in wind turbines, it always occupies a large proportion in the total investment of wind power. The front end of the main shaft is connected to the hub of the wind wheel, and the rear end is connected to the planetary frame of the gearbox. During the operation of the fan, the main shaft bears various loads transmitted from the hub and transmits the torque to the gearbox, and the axial thrust, torque and bending moment Passed to the frame and tower. Therefore, the main shaft must ensure stable operation in a harsh environment, and its mechanical performance requirements are high, its strength and plasticity indicator...

AI Technical Summary

Problems solved by technology

Nowadays, most fan shafts are produced by forging, the production process is complicated, the production cycle is long, and the manufacturing cost is high.

Compared with forging production, casting production has obvious advantages in terms of weight reduction and cost, and makes the design of the main shaft structure more flexible, but there are still few optimization methods for the main shaft parameters of the casting production method in the prior art

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