自升式平台的结构强度分析  

Structural Strength Analysis of the Jack-ups

作　　者：林钟明[1] 陈瑞峰[1] 姚艳萍[1] 

机构地区：[1]中国船级社,北京100006

出　　处：《中国造船》2005年第B11期308-313,共6页Shipbuilding of China

摘　　要：自升式钻井平台是指具有活动桩腿，并可将平台主体上升到海面以上一定高度进行作业的平台，它在海洋石油开发中被广泛采用。本文采用Zenscad海工结构分析软件，对一个典型的自升式钻井平台进行了结构静力分析，并分别针对预压载工况、正常作业工况以及极端工况，对平台主体和桩腿的强度进行了校核。荷载主要是考虑了结构自重、功能荷载以及环境荷载。有限元建模主要采用了梁单元和板壳单元，其中梁单元用于模拟桩腿、强横梁、底肋板、纵桁、舱壁垂直和水平扶强材等强力构件，板壳单元用于模拟主甲板、底板、船体外围板以及舱壁板等结构。基于上述分析，结果给出了构件的应力水平、最大节点位移以及桩基支反力。本文对自升武平台的结构设计和在位分析具有一定的参考价值。Jack-up is a unit with movable legs capable of elevating its hull above the surface of the sea, which is widely used in the offshore oil exploration. Zenscad program is used to perform the static analysis of one typical jack-up in this paper. The analysis is conducted for the hull structure and legs under normal operation, survival and preloading conditions, for which dead, operational and environmental loadings are considered. Beam and shell elements are used in the finite element modeling, in which beam element simulates the main girders and frames, and shell element simulates the main deck, bottom plate, side plates, internal side walls and watertight bulkheads. Nominal stresses for all members are checked according to the allowable stress. Maximum deflections of the joints and the support reactions are also given. This paper can be a reference for the design and in-place structural assessment of self-elevating type units.

关 键 词：自升武平台 结构分析 有限元 

分 类 号：U463.32[机械工程—车辆工程] TU661[交通运输工程—载运工具运用工程]