Numerical Simulation of Multi-Pass Welding Temperature Distribution of Jacket Platform Assembly Using SYSWELD Software

At present, the flame retardant system was adopted by Cnooc offshore oil engineering (Qingdao) co, LTD (COOEC) workshop ton class jacket platform, whose heat resistance temperature is no more than 80°C. The part of flame retardant area is burned by excessively high temperature and excessive on-site repair work at COOEC workshop due to reserved area of flame retardant is not accurate. In this paper the welding simulation software SYSWELD was used to analyze the temperature distribution of weld joint of typical assembly at workshop. The process parameters, material and model input parameters were adjusted by the field data feedbacks to obtain the optimized welding temperature distribution. The results show that the temperature distribution simulated by the SYSWELD was similar to the field actual measurements. The results of the temperature distribution of the weld joint give the accurate reserved area of flame retardant.