拖航状态的自升式平台桩腿强度分析

摘要

为实现拖航状态的自升式平台桩腿强度分析，借助DNV系列软件包，以频率响应分析的方法对自升式海洋平台拖航状态时的横摇和纵摇固有周期进行了计算；以频响分析中各相应固有周期的RAO值和相关规范规定的6度单幅横摇或纵摇值确定拖航的计算波高，并进行拖航状态时的准静态结构分析；最后采用API-AISC-WSD软件来完成桩腿自身结构的屈服和屈曲强度校核，从而为自升式平台确定恰当的桩腿系固和拖航方案提供依据。%This paper calculates the roll and pitch natural period of the self-elevating drilling unit legs in towing condition for the structural strength analysis of legs by frequency response analysis method via DNV software package. It also calculates the wave height by the RAO value of the strength analysis of the unit legs and the 6°single amplitude rolling and pitching value in the relevant regulations, and carries out the quasi-static structural analysis in the towing condition. Finally, it checks the yield and buckling structural strength of the unit legs by API-AISC-WSD, which provides the basis for the appropriate leg securing and towing scheme.