1.5 MW某型现代风机塔筒强度的有限元分析  

Finite Element Analysis on the Strength of 1.5 MW Modern Wind Turbine Tower

作　　者：周思雨 胡挺 余毫 蔡军 ZHOU Siyu;HU Ting;YU Hao;CAI Jun(School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学核科学与工程学院,北京102206

出　　处：《电力科学与工程》2021年第1期62-71,共10页Electric Power Science and Engineering

基　　金：国家自然科学基金(51231002)。

摘　　要：利用有限元软件,对某公司1.5 MW风机塔筒强度进行分析,通过对塔筒结构等效简化,保留风机塔筒的主要结构,对风机塔筒第Ⅰ法兰段进行动力学及静力学分析,结果表明:在本文的分析方法下,计算的模态固有频率与解析结果一致,偏差值为10.47%。模拟发现1.5 MW风机在正常转速范围内均可安全运行。此外模拟的风机塔筒门洞、门洞周围结构最大应力、通风框及其周围的最大应力的安全裕度分别为54.7%,46.7%,30.1%和9.2%,均满足设计要求。塔筒门洞处屈曲强度缩减系数为0.709,进一步对塔筒各截面进行屈曲强度计算,通过与实际加载应力比较,各截面极限屈曲均满足设计要求,符合安全标准。Using finite element software,the strength of a 1.5 MW wind turbine tower is analyzed.Based on the equivalent simplified structure,the tower reserves the major structure,and the dynamics and statics analysis of the first flange section of the tower is carried out.The results show that under the analysis method of calculation proposed in this paper,modal frequencies and analytical results are consistent,and the deviation is 10.47%;it is found that 1.5 MW wind turbine tower can operate safely within the normal speed range.In addition,the safety margin of the simulated door hole,the structure around the door hole,the ventilation frame and its surrounding maximum stress are 54.7%,46.7%,30.1%and 9.2%respectively,which all meet the design requirements.The reduction coefficient of the buckling strength at the door of the tower is 0.709.The buckling strength of each section of the tower is further calculated.By comparing the actual loading stress,the ultimate buckling of each section meets the design requirements and the safety standards as well.

关 键 词：有限元 风机塔筒 门洞 通风口 动力学分析 共振检查 极限应力分析 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]