CAJ | 학술논문

以半潜式钻井平台为研究对象，研究承载力极限状态设计方法的应用。文中首先介绍了承载力极限状态、分析方法、强度衡准；然后基于非线性软件ABAQUS，以加筋板架为研究对象，对其极限强度有限元数值仿真的分析方法、初始变形影响、结果分析技术等进行研究，总结形成数值仿真分析技术。在此基础上，分析半潜平台结构模型、载荷模型、边界约束等，研究目标平台在横向分离、纵剪、纵扭三种变形模式下的极限承载力及变形模式；分析等效模型、加筋模型对计算结果、计算效率的影响，提出半潜式平台极限强度工程化数值分析技术。最后，基于部分安全系数准则提出完整半潜式平台结构极限强度衡准，并对目标平台进行评估；总结形成半潜式钻井平台基于承载力极限状态的结构设计技术。
이반잠식찬정평태위연구대상，연구승재력겁한상태설계방법적응용。문중수선개소료승재력겁한상태、분석방법、강도형준；연후기우비선성연건ABAQUS，이가근판가위연구대상，대기겁한강도유한원수치방진적분석방법、초시변형영향、결과분석기술등진행연구，총결형성수치방진분석기술。재차기출상，분석반잠평태결구모형、재하모형、변계약속등，연구목표평태재횡향분리、종전、종뉴삼충변형모식하적겁한승재력급변형모식；분석등효모형、가근모형대계산결과、계산효솔적영향，제출반잠식평태겁한강도공정화수치분석기술。최후，기우부분안전계수준칙제출완정반잠식평태결구겁한강도형준，병대목표평태진행평고；총결형성반잠식찬정평태기우승재력겁한상태적결구설계기술。
This paper carries out the research on the design of a semi-submersible drilling platform in the Ultimate Limit State (ULS). It firstly introduces the Ultimate Limit State (ULS), analysis the methods for the ultimate strength and the strength criteria. Then, the ultimate strength of a stiffened plate has been simulated by the nonlinear ifnite element package ABAQUS, and the numerical simulation analysis technologies are developed through the investigation of analysis methods, effects of initial delfection, results analytical technology, and so on. Furthermore, they are applied to analyze the structural models, load models and boundary conditions of the semi-submersible drilling platform, study the ultimate forces and damage modes of the target platform under the transverse split force, longitudinal shear force and longitudinal torsion, and research the effect of equivalent models and stiffened models on the results and computational effciency, in order to propose the engineering numerical analysis technologies for the ultimate strength of the semi-submersible platform. Finally, based on the partial safety-factor criterion, it puts forward the complete structure ultimate strength criteria for the semi-submersible platform and conducts the evaluation of the target platform, and concludes and proposes the structural design technology when it is in the ULS.