Investigation of Influence of Mooring system in Response of FPSO

Document Type: marine engineering


1 Department of Marine Industry, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Ocean Engineering, Amirkabir University of Technology, Tehran,


FPSOs are useful in newly established offshore oil regions where there is no pipeline infrastructure in place, or in remote locations where building a pipeline is cost-prohibitive. In this study, hydrodynamic analysis of FPSO is inquired based Boundary Element Method (BEM) and wave forces/moments, added mass and damping coefficients of degrees of freedom are obtained by AQWA software. FPSO moored with mooring lines and developed a MATLAB code to calculate stiffness matrix. Then the responses of FPSO for three conditions, without mooring line, with three mooring lines and twelve mooring lines are illustrated. The results show that mooring system is effective in the reduction of surge response, but  it has not major effect in increasing of heave and pitch responses.


FPSO, (2015). Floating Production Storage and Offloading Definition. Investopedia.

Ba, U. M. (2012). Analysis of mooring and steel catenary risers system in ultra deepwater.‏

Ba, U. M.; Chan, H. S., (2011). Time Domain Analysis of a Multi-component Mooring and Steel Catenary Risers System in Ultra Deepwater. ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, American Society of Mechanical Engineers,‏ 869-876.

Soares, C. G.; Fonseca, N.; Pascoal, R.; Clauss, G. F.; Schmittner, C. E.; Hennig, J., (2006). Analysis of design wave loads on an FPSO accounting for abnormal waves. Journal of offshore mechanics and Arctic engineering, 128(3), 241-247.‏

Fonseca, N.; Pascoal, R.; Soares, C. G.; Clauss, G.; Schmittner, C., (2010). Numerical and experimental analysis of extreme wave induced vertical bending moments on a FPSO. Applied Ocean Research, 32 (4), 374-390.‏

Fonseca, N.; Guedes Soares, C., (1998).Time-Domain Analysis of Large Amplitude Vertical Motions and Wave Loads. J. Ship Res.,422, 100–113.

Wu, H. L.; Chen, X. J.; Huang, Y. X.; Wang, B., (2014). Influence of the legs underwater on the hydrodynamic response of the multi-leg floating structure. Ships and Offshore Structures, 9 (6), 578-595.‏

Tabeshpour.M. R.; Malayjerdi, E., (2016). Investigation of Pitch Motion Portion in Vertical Response at Sides of a Tension-Leg Platform. Journal of Marine Science and Application, 15, 175-181.

Montasir, O. A.; Yenduri, A.; Kurian, V. J., (2015). Effect of mooring line configurations on the dynamic responses of truss spar platforms. Ocean Engineering, 96, 161-172.‏

Qiao, D.; Li, B.; Ou, J., (2014). Use of different


mooring models on global response analysis of an innovative deep draft platform. Journal of Ocean University of China, 13 (2), 215-222.‏