CAJ | 학술논문

以普通自升式平台桩腿弯矩分析为基础，研究沉垫自升式平台迁移工况下桩腿的弯矩情况。建立沉垫自升式平台横摇力学模型，对平台迁移工况下的横摇状态进行力学分析，分别推导普通自升式平台和沉垫自升式平台桩腿惯性弯矩及总弯矩公式，并分析沉垫位置与桩腿弯矩的关系。以某沉垫自升式平台为例，研究沉垫处于不同位置时桩腿弯矩的变化规律，并与相同状况下的普通自升式平台桩腿弯矩情况进行对比。研究结果表明：沉垫的存在会增大桩腿在主甲板处的惯性弯矩；主甲板以上桩腿长度减小，沉垫与主甲板的距离增大，则风力、重力产生的弯矩减小，惯性弯矩增大。惯性弯矩是总弯矩变化的决定因素。随着沉垫的下降，桩腿总弯矩呈线性上升。
이보통자승식평태장퇴만구분석위기출，연구침점자승식평태천이공황하장퇴적만구정황。건립침점자승식평태횡요역학모형，대평태천이공황하적횡요상태진행역학분석，분별추도보통자승식평태화침점자승식평태장퇴관성만구급총만구공식，병분석침점위치여장퇴만구적관계。이모침점자승식평태위례，연구침점처우불동위치시장퇴만구적변화규률，병여상동상황하적보통자승식평태장퇴만구정황진행대비。연구결과표명：침점적존재회증대장퇴재주갑판처적관성만구；주갑판이상장퇴장도감소，침점여주갑판적거리증대，칙풍력、중력산생적만구감소，관성만구증대。관성만구시총만구변화적결정인소。수착침점적하강，장퇴총만구정선성상승。
Towing condition of the mat supported jack up platform was introduced briefly. Based on the bending moment study on legs of common jack up platform, the bending moment of mat supported jack up platform was studied. Force analysis on jack up platform was made when it was in rolling state. The formulas of inertia bending moment and total bending moment were deduced respectively. Based on these bending moment formulas, the relationship between location of mat and bending moment of leg was researched. The bending moment change of legs in different mat location was studied based on a real jack up platform. A comparison between mat supported and common jack up platform was made at last. Research results show that the existence of the mat can increase the inertia bending moment of the leg at the main deck. If the leg length above the main deck decreases and the distance between the mat and the main deck increases, the bending moment caused by wind force and gravity may increase. Inertia moment is the dominant factor to the variation of the overall moment. The overall bending mo-ment of the leg increases linearly with the decline of the mat.