锻造法兰应用10.9级螺栓的数值模拟分析  

Numerical simulation analysis of forging flanges with 10. 9-grade bolts

作　　者：孙鸣夏 邓洪洲[1] 赵峥[2] 傅鹏程[2] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]华东电力设计院有限公司,上海200063

出　　处：《建筑结构》2016年第14期91-96,共6页Building Structure

摘　　要：为研究10.9级螺栓在锻造法兰中的应用,根据现有的锻造法兰设计方法,分别按采用8.8级螺栓以及10.9级螺栓设计试件。在此基础上,通过有限元软件ANSYS对法兰进行非线性数值分析,计算并对比法兰的变形特征以及受力性能方面的差异。通过改变法兰设计参数,比较了法兰颈坡度、法兰颈高度系数E_d对螺栓轴向拉力的影响,结果表明增大法兰颈高度系数对螺栓轴向拉力的改善最为简单有效。建议在应用10.9级螺栓进行法兰设计时,将法兰颈高度系数E_d从2.2调整为2.3,以改善螺栓轴向拉力。分析结果表明,应用10.9级螺栓可节约7%法兰总材料费。In order to study the application of 10.9-grade bolts in forging flanges, specimens with both 8.8-grade bolts and 10.9-grade bolts were designed according to current forging flange design method. On this basis, nonlinear numerical simulation analysis of forging flanges was carried out by finite element software ANSYS, to calculate and compare differences of deformation characteristics and mechanical behaviors of different flanges. The influences of flange neck slope and flange neck height coefficient （Ed） on axial tensile forces of bolts were compared through changing flange design parameters. Results show that increasing Ed is the most simple and effective way to reduce axial tensile forces of bolts. It is suggested that the factor Ed should be increased from 2.2 to 2.3 when designing flange with 10.9-grade bolts to improve axial tensile forces of bolts. Analysis results show that 7 percent of total flange material costs will be saved by using 10. 9- grade bolts.

关 键 词：钢管塔 锻造法兰 高强螺栓 有限元分析 法兰设计参数 

分 类 号：TU392.3[建筑科学—结构工程]