作业水深122m自升式平台桁架式桩腿结构分析  

Comparative Analysis of Truss Type Leg Structure of 122 m Jack-up Platform

作　　者：刘运祥 田晓洁[1] 刘贵杰[1] 李道喜 韩翔宇 Liu Yunxiang;Tian Xiaojie;Liu Guijie;Li Daoxi;Han Xiangyu(College of Engineering,Ocean University of China)

机构地区：[1]中国海洋大学工程学院

出　　处：《石油机械》2019年第12期50-57,共8页China Petroleum Machinery

基　　金：国家自然科学基金项目“基于多源随机载荷下自升式平台桩腿结构拓扑优化方法研究”(51609223)

摘　　要：自升式平台桁架桩腿主要有3种结构型式:K型、倒K型和X型,其结构性能直接关系到平台的使用寿命,目前鲜有针对不同桩腿结构型式进行全尺度仿真的研究。鉴于此,在保持不同桩腿结构各构件具有相同截面尺寸的前提下,分别对3种平台结构在风暴自存工况下进行静、动力学响应及平台稳定性分析。研究结果表明:倒K型平台结构最大应力与位移值最小,力学性能最好,X型次之,K型最差;倒K型平台结构最大应力点出现在弦杆与横撑的管节点处,X型与K型结构的最大应力点在弦杆底部;倒K型桩腿平台具有较小的动态平均应力和位移值,且应力幅值最小,X型次之,K型最差;倒K型桩腿平台结构具有较高的屈曲临界载荷,在环境载荷作用下的稳定性最好。所得结果可为自升式平台桩腿的选型和设计提供指导,具有一定的工程应用价值。There are three main types of jack-up platform truss pile legs: K type, int-K type and X type, whose structural performance is directly related to the service life of the platform. At present, there are few full-scale simulations for different pile-leg structure types. In view of this, given the same section size of different pile leg component, the static and dynamic responses and the stability of the three type platforms under the conditions of storm self-survival are analyzed and compared. The results show that the maximum stress and displacement of int-K type structure is the minimum, and the mechanical properties of int-K type structure is the best, followed by X type structure and then the K type structure. The maximum stress point of int-K type structure pile leg is at the pipe joint of chord and transverse brace. The maximum stress point of X type and K type structure is at the bottom of chord. The int-K type structure has a smaller dynamic mean stress and displacement, and the smallest stress amplitude, followed by X type and K type structure. The int-K type structure has a high critical buckling load, and the best stability under environmental loads. The study results can provide guidance for the selection and design of jack-up platform pile legs and have certain engineering application value.

关 键 词：自升式平台 桁架式桩腿 自存工况 全尺度仿真 ANSYS 

分 类 号：TE952[石油与天然气工程—石油机械设备]