反向平衡法兰有限元分析  

Finite Element Analysis of Reverse Balance Flange

作　　者：马人乐[1] 黄冬平[1] 吕兆华[2] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学建筑设计研究院,上海200092

出　　处：《特种结构》2009年第1期21-25,共5页Special Structures

摘　　要：目前,风力发电机各段塔筒多采用进口厚型锻造法兰连接,其生产加工成本高、周期长。反向平衡法兰是一种新型节点,可应用于受疲劳荷载作用的风力发电机塔筒连接;与反向平衡法兰配套的施工器具—高强螺栓液压张拉器是保证风力发电机塔筒刚性连接的重要技术措施。本文利用通用有限元软件ABAQUS对该法兰的静力和疲劳性能进行弹塑性分析,并分析了高强螺栓液压张拉器张拉反向平衡法兰螺栓的过程及螺栓预拉力损失。结果表明:反向平衡法兰受力明确,具有足够的安全储备,满足1000万次疲劳寿命要求;有限元手段能较好地模拟张拉过程,分析得到的预拉力损失与试验结果接近。At present, the tower partitions of windmill generators are mostly connected with thick forged flanges, which are high in expenditure and time-consuming in production. Reverse Balance Flange is an innovative connection for windmill-generator towers under fatigue loads. Hydraulic tensioning device for high-strength bolts is introduced to ensure the connection rigid. An elastic-plasticity analysis is done to evaluate the static and fatigue behavior of such flange using the finite element package ABAQUS. The pulling process of bolts of Reverse Balance Flange is also simulated to calculate the loss of pre-stress. Results show that Reverse Balance Flange has sufficient margin of safety and meets the requirements of perpetual fatigue life, by which loads can transferred definitely, and the data of pre-stress loss acquired using FEM closely meets tests outcomes.

关 键 词：反向平衡法兰 静力和疲劳性能 弹塑性分析 高强螺栓液压张拉器 预拉力损失 

分 类 号：TH131[机械工程—机械制造及自动化]