海洋平台KK型管节点的疲劳性能试验研究  

Experimental Study on Fatigue Properties of Tubular KK-joints of Offshore Platform

作　　者：甘进[1] 乐京霞[1] 吴卫国[1] 姚晋[2] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]中国舰船研究设计中心,武汉430074

出　　处：《武汉理工大学学报（交通科学与工程版）》2011年第5期980-983,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目(批准号:51009111);中国博士后基金项目(批准号:20100470057)资助

摘　　要：以某自升式海洋平台为研究对象,进行了空间KK型管节点在轴力作用下的疲劳性能的试验研究.通过对管节点模型的试验测试,得到了KK节点在轴力作用下沿着焊缝周围的热应力区内的热点应力分布及节点的应力集中系数,并采用S-N曲线法对KK型管节点的疲劳寿命进行估算.通过对比分析,指出了试验方法与规范计算方法在管节点疲劳性能分析上的差异性.Based on the joints used in the jack-up platform,the experiment study on the fatigue properties of space KK-joints under axial loading was carried.The hot spot stress（HSS） distribution and the stress concentration factors（SCF） along the weld toe in the HSS region for tubular KK-joints were obtained through experimental tests on the tubular joints model.Then,the fatigue life of the tubular joint was estimated by S-N curves method.Finally,the results of fatigue properties obtained from the experimental method were compared against predictions from some well-established existing equations in the offshore rules.Meanwhile,the research conclusions can be used to guide the design of leg structure of offshore jack-up platforms.

关 键 词：管节点 应力集中系数 热点应力 S-N曲线 疲劳寿命 

分 类 号：TU398[建筑科学—结构工程] O346[理学—固体力学]