摘要
耦合载荷引起的叶片挠曲变形一直以来是制约风力发电机安全性、可靠性提升的瓶颈问题。采用基于镜像对称方法的结构补偿技术对其结构进行优化,首先建立了风力发电机的三维模型,对其流固耦合特性进行分析;其次,根据叶片的节点变形建立风力发电机的参数化模型,采用中心复合设计方法生成了81组样本点;最后,采用直接镜像对称补偿方法和基于优化设计理论的镜像对称方法对叶片结构进行补偿,经对比分析可知,采用镜像对称补偿方法与基于最优化设计理论的镜像对称方法均可有效缓解因气动载荷而引起的风力发电机叶片结构挠曲变形,但前者可以在有效保证补偿结果的前提下节约大量的计算资源。
The deflection and deformation of wind turbines due to their coupled loads has always been a bottleneck problem that restricts their safety and reliability improvement,To solve this problem,a structural compensation technique based on mirror symmetry method was used to optimize its structure.Firstly,a three-dimensional model of the wind turbine was established to analyze its fluid structure coupling characteristics.Then,a parameterized model of the wind turbine was established according to the node deformation of the blade,81 sample point were generated by central composite design method.Finally,a direct mirror symmetry compensation method and a mirror symmetry method based on optimization design theory were used to compensate the blade structure.Through comparative analysis,Both the mirror image symmetric compensation method and the mirror image symmetric method based on optimization design theory can effectively alleviate the structural deflection of wind turbine blades caused by aerodynamic loads,but the direct mirror image symmetric compensation method can save a lot of computing resources on the premise of effectively ensuring the compensation results.
作者
薛旭东
赵知辛
刘晓慧
XUE Xudong;ZHAO Zhixin;LIU Xiaohui(Shaanxi Railway Institute,Weinan 714000,Shaanxi,China;Department of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China)
出处
《模具技术》
2023年第5期27-35,共9页
Die and Mould Technology
基金
陕西铁路工程职业技术学院2022年科研基金项目(KY2022-53)
陕西省科技厅重点研发计划项目(编号:2019GY-068)
陕西省教育厅专项科研计划项目(编号:16JK147)。
关键词
气动弹性变形
结构补偿技术
镜像对称方法
最优化设计理论
有限单元法
aeroelastic deformation
structural compensation technology
symmetrical method
optimal design the ory
finite element method
