| In recent years,the clean energy industry has developed rapidly.The wind power industry has gradually developed into a state of coexistence of land and sea.The capacity of wind turbines has been continuously expanded.Relevant enterprises are facing the impact of new technology iterations.At the same time,the design method of the original wind turbine blade mold steel frame structure is relatively backward,and the design redundancy rate is large.In order to reduce the structural quality of the blade mold steel frame and reduce the cost,the finite element model and data analysis of the blade mold steel frame are carried out by ANSYS software,and the lightweight design of the blade mold steel frame is carried out by TOPSIS and approximate model method.Finally,the simulation optimization plug-in of the blade mold steel frame is developed by ANSYS ACT,so as to complete the construction,analysis,optimization and data output of the blade mold steel frame,which provides a reference for the design and simulation optimization of the blade mold steel frame.Mainly completed the following three aspects of work :(1)The finite element pre-processing of the model is carried out in ANSYS software,and then the static analysis of the blade mold steel frame is carried out every45 degrees to obtain the maximum equivalent stress and deformation at each flip angle,analyze its strength and stiffness,and determine the most dangerous flip angle of the blade mold steel frame.The subsequent lightweight design is carried out at this angle.The modal analysis of the blade die steel frame is carried out to obtain the first 6-order free modal frequency value and vibration mode.The results show that the blade mold steel frame will not resonate with the external excitation source.(2)According to the static analysis results of blade die steel frame,a lightweight method of blade die steel frame based on approximate model is proposed.The TOPSIS method is used to select the variables that have the greatest influence on the performance of the blade die steel frame.The mathematical function is established with the design strength and stiffness as the constraints and the structural quality as the optimization goal.The sample points are collected to establish the approximate model,and then the lightweight design is carried out according to the MOGA algorithm.After the blade die steel frame is optimized,the die quality is reduced by about 18 % under the premise of meeting the design requirements.(3)The interface development and simulation process development are carried out by ANSYS ACT,so as to develop the simulation optimization plug-in of blade die steel frame,which can realize the parametric creation of three-dimensional model of blade die steel frame,and realize finite element analysis and optimization design through the plug-in user interface.The dynamic and static analysis of the blade die steel frame is carried out by using CAE technology to avoid the large error of the traditional method.Secondly,the lightweight design based on the results can reduce the weight of the blade die steel frame and save materials.Finally,the simulation optimization plug-in of blade die steel frame is developed to realize the simulation analysis and optimization design of blade die steel frame.At the same time,the CAE simulation technology,lightweight method and plug-in development process of this project can be applied to other engineering machinery and other fields to provide reference for other engineering fields. |
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