Research and development


From 2003 to 2005, PRINCIPIA led the SALT JIP dedicated to the numerical modelling of the coupling effects between the response of a vessel at sea and the sloshing in tanks. The model is based on the theory proposed by Pr Bernard Molin, and has been developed and validated in DIODORE™ on model tests for a vessel at zero speed and with forward speed. From 2008 to 2010, PRINCIPIA also led the SALT II JIP dedicated to same issue in the case of a side-by-side configuration, and to the numerical modelling of the interaction effects between vessels due to the proximity of bodies.


PRINCIPIA led the CALM Buoy JIP from 2002 to 2006 which gathered five Oil Companies and Seven contractors. The hydrodynamic issues raised by small floaters like the CALM buoys were addressed through comparisons with model tests with a specific focus on the viscous damping formulations.  Several months of recordings of the GIRASSOL buoy motions were made available during the JIP for comparison with numerical results. Finally, different approaches were compared to assess the fatigue in the mooring lines and the offloading lines.


In the frame of the OPB JIP lead by SBM, Principia performed local analysis of chain links for comparison with experimental tests and the development of a fatigue assessment methodology.


This R&D project sponsored by CITEPH addressed the occurrence of instability in risers with non-circular cross sections. The scope combined experimental tests, CFD calculations and F.E. analysis of a Hybrid Tower (cf OMAE 2013 – 10357).


High Reynold’s numbers VIV

Engineering tools for VIV are based on a database of coefficients derived from model tests with Reynold’s numbers much lower than in real conditions.  This R&D project sponsored by TOTAL, TECHNIP, DORIS Engineering, SUBSEA 7 and SAIPEM in the frame of the CITEPH addressed this issue with specific model tests conducted by OCEANIDE and the expertise of ECM (cf. OMAE 2013 – 10638).Safety Engineering

PRINCIPIA, in collaboration with partners, has developed a new design process based on a project global overview keeping in mind the final objectives in terms of safety and performance. This new approach provides the opportunity to reduce project cost and obtain better outcomes.