摘要
针对自升式平台在海上石油开采中面临的安全问题,以某自升式平台为例,基于ANSYS有限元软件,以载荷重现期作为环境载荷施加的变量,采用改进的非线性推覆方法对平台在极端环境作用下极限承载力与失效模式进行分析。结果表明:甲板上浪载荷是影响平台倒塌的重要因素,不同入射工况下平台的倒塌模式均为桩腿的中下部斜撑结构形成塑性铰,塑性失效位置以及3条桩腿的塑性失效程度取决于入射角度。以环境重现期为标准对平台环境承载力进行分析,可为自升式平台极限性能与弱点位置的分析提供参考。
Aiming at the safety issues faced by self elevating platforms in offshore oil exploration,taking a certain self elevating platform as an example,based on ANSYS finite element software,with the load period as the variable applied to the environmental load,an improved nonlinear pushover method is used to analyze the extreme bearing capacity and failure mode of the platform under extreme environmental conditions.The results show that wave-in-deck load is an important factor affecting the collapse of the platform.The collapse mode of the platform under different incident conditions is the plastic hinge formed by the middle and lower slant support structure of the pile legs.The location of plastic failure and the degree of plastic failure of the three pile legs depend on the incident angle.The analysis of the platform's environmental carrying capacity based on the environmental return period can provide reference for the analysis of the ultimate performance and vulnerability location of jack-up platforms.
作者
王晨思
杨树耕
张德瑞
朱本瑞
WANG Chensi;YANG Shugeng;ZHANG Derui;ZHU Benrui(Tianjin University,School of Civil Engineering,Tianjin 300350,China;Tianjin University,State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin 300350,China;China Shipbuilding Group Wind Power Development Co.,Ltd,Beijing 100080,China;System Engineering Research Institute,CSSC,Beijing 100094,China)
出处
《船舶工程》
CSCD
北大核心
2023年第8期142-147,共6页
Ship Engineering
基金
国家自然科学基金(51509184)
