海洋石油钻机井架动力特性分析  

Dynamic characteristics analysis of derrick structure for offshore drilling rig

作　　者：关晓晶[1] 周国强[1] 郭奕珊[1] 

机构地区：[1]大庆石油学院秦皇岛分院,河北秦皇岛066004

出　　处：《大庆石油学院学报》2005年第3期53-54,69,124,共4页Journal of Daqing Petroleum Institute

摘　　要：对在役海洋石油钻机井架进行了结构动力特性分析,并采用有限元法将钻机井架各杆件简化为空间梁单元,对钻机井架三维计算模型进行了离散,给出了模态分析和稳定性分析结果.分析结果表明:井架的2根前立柱是钻机井架承载能力的薄弱环节;低阶振型反映井架的整体振动形式,当井架达到临界载荷时,井架结构出现失稳现象.The dynamic characteristics analysis is made for the derrick structure of the offshore drilling rig in some well drilling companies. This paper mainly deals with simulation and stability analysis and simplifies each member as three-dimensional beam unit with finite element method. The result shows that two columns in front of the derrick are the weak part of the bearing capacity; the low oscillation mode reveals the whole vibration form of the derrick, the buckling modality is its losing steady in the form of leaning forward wholly. When the derrick is under its critical loading capacity, disequilibrium will occur in the derrick structure.

关 键 词：海洋石油钻机 钻机井架 结构分析 动力特性 有限元法 

分 类 号：TE923[石油与天然气工程—石油机械设备]