关键词: 风力发电机主轴, ANSYS软件, 参数化建模, ISIGHT软件, 可靠性优化设计

Abstract: Based on ANSYS parametric design language APDL,the parametric finite element model of wind turbine main shaft was established with taking the structural dimension parameter as the variable.At the same time,the finite element analysis command file of main shaft was compiled.On this basis,the DOE(Design of Experiment) for main shaft was executed by using ISIGHT combined ANSYS,and the influence of the dimension parameters on the maximum working stress of main shaft was gained.The 5 dimension parameters which have greater influence on the maximum working stress of main shaft were selected and a two order response surface model for the parameters selected and the maximum working stress was built by using the approximate modeling function of ISIGHT.According to the response surface model gained,the static strength reliability computation program of main shaft was compiled by MATLAB.Finally,on the basic of ensuring the structural reliability level meets the requirement,the dimension optimized design of main shaft was carried out through the optimization module of ISIGHT.The optimization results showed that the optimization effect of the MISQP optimization algorithm was the best, and the volume of wind turbine shaft was reduced by 2.47 %.

Key words: main shaft of wind turbine, ANSYS software, parametric modeling, ISIGHT software, reliability-based optimization design