Numerical and model test study on the hydrodynamic performance of FDPSO with spreading mooring system

Because the environment condition of the South China Sea is very severe, the position system of FDPSO is a worthy topic of studying. In this study, numerical method and model test are adopted to investigate the hydrodynamic performance of FDPSO with spreading mooring system. Frequency domain method and time domain coupled analysis are involved in the numerical calculation. The hydrodynamic coefficients, wave exciting force and response amplitude operator are obtained from the frequency domain analysis. The motion character of FDPSO in one-year and a hundred year return period sea states of the South China Sea are acquired by time domain coupled method. The model tests are carried out in the Deepwater Offshore Basin at Shanghai Jiao Tong University, which are composed of free decay tests, white noise tests and irregular wave tests. The numerical results are compared with the test results to verify the numerical model. The hydrodynamic performance of FDPSO with spreading mooring system in operating condition and extreme condition of the South China Sea are studied.