逆K型管节点应力集中系数研究  

NUMERICAL ANALYSIS OF THE STRESS CONCENTRATION IN REVERSE K-JOINTS

作　　者：曹宇光[1] 张士华[2] 田海庆[2] 蒙占彬[2] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]胜利石油管理局钻井工艺研究院,山东东营257017

出　　处：《力学与实践》2013年第6期30-37,共8页Mechanics in Engineering

基　　金：国家自然科学基金(11242004);中央高校基本科研业务费专项(12CX04068A)资助项目

摘　　要：逆K型管节点广泛应用于海洋平台,其强度是平台结构安全评估的重要课题.基于ANSYS软件,应用分区域网格划分法,建立含焊缝的逆K型管节点有限元模型,分别计算了在轴向载荷、平面内弯矩和平面外弯矩作用下焊缝周围热点应力的分布情况.通过对105组逆K型管节点模型进行分析,获得了其在3种基本载荷作用下沿焊缝的应力集中系数(stress concentration fctor,SCF),并对主管和支管的SCF分别进行研究,得出了几何参数对主管和支管的SCF及极值位置的影响规律.The reverse K-joints are widely used on offshore platforms, therefore, their strength is a very important issue for the safety evaluation of the platforms. Using ANSYS software, an FEM model of the reverse K-joint with welding seams is built. It is divided into several zones and each zone is meshed separately. The distribution of the hot-spot stress around the welding seams of the joints subjected to axial loads, in-plane bending （IPB） moments and out-of-plane bending （OPB） moments is analyzed. Based on the results of 105 reverse K-joints models, the stress concentration factor （SCF） around the wedling seams under these three basic loads is obtained. By analyzing the chord and the brace separately, the effects of geometrical parameters on the SCF and the hot-spot locations are studied.

关 键 词：逆K型管节点 应力集中系数 几何参数 

分 类 号：TE952[石油与天然气工程—石油机械设备]