Simulation of Overall Performance of Jack up Platforms Under Multiple Working Conditions

Jack up platforms are important offshore oil drilling equipment. Due to the harsh working environment, their safety must be ensured during design and manufacturing. Based on the truss leg structure of CJ 50 jack up platform, a finite element model of a three-legged jack up platform was established using CAE simulation software Abauqs. The overall performance of the jack up platform under jacking conditions, pre-load conditions, and survival conditions was simulated. The results show that under the design sea conditions of the jack up platform, the CJ 50 type jack up platform model established can meet the safety performance requirements of jacking conditions, pre-load conditions, and survival conditions. Among them, the stress caused by pre-load conditions on the jack up platform is the largest, followed by jacking conditions, and finally pre-load conditions. The maximum stress occurs at the contact position between the legs and the lower guide plate in the jacking house area. The research results can provide a basis for the design and safe operation of jack up platforms.