大容量外转子永磁风力发电机组转子结构的轻量化设计  

Lightweight design of rotor structure of large capacity outerrotor permanent magnet wind generator

作　　者：张坤 于慎波[1] 翟凤晨 卢华兴 刘伟 ZHANG Kun;YU Shen-bo;ZHAI Feng-chen;LU Hua-xing;LIU Wei(College of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Research Institute of Science and Technology Co.,Ltd.,State Power Investment Group,Beijing,100029,China)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870 [2]国家电投集团科学技术研究院有限公司,北京100029

出　　处：《机电工程》2020年第12期1547-1552,共6页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51175350)。

摘　　要：3 MW永磁风力发电机组外转子结构重量较大,增加了机组负荷且影响机组的安全性,针对这一问题,对风力发电机组外转子结构的载荷特性和应力变形进行了研究。提出了拓扑优化、多目标灵敏度分析、响应面优化相结合的转子轻量化方法,通过变密度法建立了变形能最小化的转子优化模型,对转子模型进行了初步的拓扑优化设计;对转子模型进行了参数化建模,通过灵敏度分析确定了对转子结构影响较大的结构尺寸参数;结合响应面优化方法筛选出了最优目标参数,实现了转子最优结构设计目标。研究结果表明:在保证结构强度和变形满足要求的条件下,经轻量化设计后结构整体减重4799 kg,占总重量的26.5%。Aiming at the problems that the weight of the outer rotor structure of 3 MW permanent magnet wind generator was large,which increased the load of the unit and affectd the safety of the unit,the load characteristics and stress deformation of the outer rotor structure of the wind generator unit were studied.The rotor lightweight method combined with topology optimization,multi-objective sensitivity analysis and response surface optimization was proposed.By using the method of variable density,the optimization model of rotor with minimum deformation energy was established,and the preliminary topology optimization design of the rotor model was carried out.The parametric modeling of the rotor model was carried out,and the structural size parameters which had great influence on the rotor structure were determined by sensitivity analysis.Combining with the response surface optimization method,the optimal parameters were selected to achieve the optimal structural design goal of the rotor.The results indicate that under the condition that the structural strength and deformation meet the requirements,the overall weight loss of the structure is 4799 kg,which accounts for 26.5%of the total weight.

关 键 词：风力发电机 拓扑优化 灵敏度分析 响应面优化 轻量化设计 

分 类 号：TH122[机械工程—机械设计及理论] TM351[电气工程—电机]