基于GL规范对兆瓦级风力发电机组机架的分析计算  

Analysis and computation for mainframe of MW class wind turbine generator system based on GL guideline

作　　者：杨兆忠[1] 颜志伟[1] 晏红文[1] 

机构地区：[1]南车株洲电力机车研究所有限公司风电事业部,株洲421000

出　　处：《机械设计与制造》2011年第9期213-214,共2页Machinery Design & Manufacture

摘　　要：对机架的分析计算包括极限强度分析、疲劳强度分析和模态分析。由于机架的结构和承受的载荷复杂,利用有限元方法对兆瓦级风力发电机组机架进行极限强度分析。根据GL规范和EC3（1~9）等标准,对焊接结构的机架利用差值外推得到焊址处在单位载荷下的应力。对作用在机架上的疲劳载荷普,通过通道合并和雨流统计得到焊址处的等效疲劳应力,并结合GL规范进行疲劳损伤判断。使用有限元法计算了机架的固有频率,防止风机工作中机架在其它振源激励下发生共振。The analysis and computation for mainframe include ultimate strength analysis,fatigue analysis and modal analysis.Since the rack structure and bearing load is complicated,FEA is applied for analyzing ultimate strength of wind turbine mainframe.According to GL and standards such as EC3 1-9,through extrapolating D-value of a rack welded structure,load stress under unit load is obtained at welding area.As for the fatigue load distribution applying upon the frame,which equivalent fatigue stress could be obtained at welding area through channel merging and rain-flow statistics,the fatigue damage could be as-sessed combing the GL standards.In addition natural frequency of the mainframe is calculated by applying the FEA to prevent the mainframe work from resonance inspired by the other local oscillator.

关 键 词：风力发电机 机架 有限元 强度 

分 类 号：TH16[机械工程—机械制造及自动化] TK8[动力工程及工程热物理—流体机械及工程]