Objectives The recovery of the dinghy is a typical dynamic problem of multi-body interaction, and the stern-slipway launch and retrieval system is widely used in that process. When the dinghy moves rapidly towards the capture devices which are located in the aft of the mother ship, it may be affected by the wake of mother ship which may cause overturn.
Methods Numerical wave tank, overlapping grid technique and 6-DOF are mainly used and the interference motion of Fridsma planing in approaching the mother ship is simulated. The motion characteristics of planing vessel in waves are calculated and analyzed while the grid independence is verified. Then the simulation of small craft's motion in regular waves in the wake of mother ship is carried out.
Results Comparison of computational and experimental results indicates that the calculation method is reliable. And the simulation results show that the influence from the mother ship is obvious.
Conclusions When the direction of motion of planing deviated from the center line of the wake of mother ship, the pitch and roll angle of it will be significantly affected, eventually leading to the occurrence of capsizing.
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