Optimization algorithm for design wave during overall strength check of cylindrical FPSO
Since the quasi-static design method of overall structural strength for cylindrical FPSO is limited by the experience of engineers,this paper introduces the design wave method to check the overall structural strength of the cylindrical FPSO and proposes the optimization algorithm of characteristic load selection.Through analyzing the overall structural load-bearing characteristics and failure mode of cylindrical FPSO,combined with common characteristic loads with the same design wave,this method chooses the wave pressure of outboard plate,horizontal and vertical acceleration of superstructure modules gravity center as the characteristic loads.Moreover,according to the structural symmetry of cylindrical FPSO,the method reduces the numbers of wave direction and optimizes the phase search of design waves.The strength check working conditions based on the method proposed in this article have been reduced by 60％,effectively improving the strength check efficiency.The method has been applied to the strength check of the first completely self-designed cylindrical FPSO"HYSY122"platform in China,and the results have been certified by the Det Norske Veritas(DNV).The platform has completed its design and entered the construction phase,which also verities the feasibility of this method and its significance of reference for the subsequent similar FPSO designs.
万方数据
维普
