Study on Structural Layout of Offshore Floating Megawatt-Scale Vertical Axis Wind Turbine Rotor
A multi-objective structural optimization design method based on response surface method is proposed to design the wind turbine structure layout of MW floating vertical vane vertical axis wind turbine.By analyzing the mechanical performance of the wind turbine support arm under complex environmental and loading conditions,a quasi-static solution is used as the basis to construct a multi-objective optimization parameterized model for the layout of the vertical-axis wind turbine rotor structure.The Kriging response surface method is employed to solve the response surface between design variables and evaluation indicators,clearly defining the optimal range of design variable values.With the minimization of the overall rotor mass as the optimization objective and the maximum equivalent stress and maximum displacement of the main rotor structure as constraints,the MOGA genetic algorithm is utilized to optimize the dimensions of the rotor structure layout.The optimal sample scheme of the rotor structure layout after optimization reduces the overall mass by 6.8％,decreases hub offset by 22.87％,and lowers the tower height by 33.78％,significantly reducing the manufacturing cost of the entire vertical-axis wind turbine.Additionally,after optimization,the inherent frequency of the rotor structure avoids the 1P and 3P ranges of rotor rotation,preventing structural resonance.The results indicate that the multi-objective optimization design method based on the response surface method is reliable for the layout design of vertical-axis wind turbine structures.
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