Application of Catenary Function in Relevant Calculation of FPSO Mooring System

On the base of the relevant catenary knowledge for the FPSO mooring system,that consists of lower chain and upper cable,in South China Sea,mathematical models are built for the lower chain and upper cable respectively.After analyzing the models,two methods corresponding two known conditions are given for establishing the catenary function.The method to analyze the mooring leg gesture and tension is introduced.At last,suggestion on the application of the method described in this paper is proposed.