Investigations on dynamic responses of floating structures based on OpenFOAM and MoorDyn
With the emergence of novel offshore floating structures,the coupling dynamic responses of the buoy and mooring system are particularly important in the safety assessments.In this paper,a coupled dynamic model for the wave-floater-mooring system was established by using the open-source computational fluid dynamics software OpenFOAM and the lumped mass-based mooring dynamics program MoorDyn.Accuracy of the present coupled model was verified by comparing numerical results with experimental data.The influence of the length of mooring line laydown part on the dynamic response of floater was further investigated.Finally,a study was conducted on the motion responses of a floating body under varying wave periods.The results show that increase of length of laydown part can reduce the surge motion of the buoy,at the same time,it will increase the pitch motion of the float at wave frequency and reduce the pitch motion at double frequency.Tension forces on the mooring line will decrease with increases of length of laydown part.As the wave period increases,there is a significant amplification in the amplitudes of the heave and surge motions of the floating body,as well as the tension amplitude of the mooring line.Furthermore,the amplitude of the pitch motion decreases conspicuously under a specific wave period.
OpenFOAMMoorDynfloating structuremooringdynamic responsesLump Mass Method
万方数据
维普
