As a new type of water power generation system,offshore floating solar photovoltaic power generation sys-tem has great research and application prospects.In this paper,based on multi-body dynamics theory,this paper establi-shes a multi-rigid-body model of floating PV foundation by considering wind force,flow force,hydrodynamic force,bollard load and connector load,and writes a numerical simulation program to analyze and study the motion response and connec-tor load of the floating PV foundation system.Firstly,the kinematic response and intrinsic period calculated by the numer-ical simulation program are compared with the results of existing hydrodynamic software to verify the accuracy of the pro-gram.Then,the kinematic response of the floating PV foundation with different stiffnesses of the connectors is carried out under the random waves of three-level sea state.Finally,the effects of different connectors stiffness on the relative motion of the floating body are analyzed.The results show that the stiffness of the connectors is an important factor affecting the relative motion of the floats,and with the gradual increase of the stiffness of the connectors,the relative motion between the floats gradually decreases,and provide suggestions for the selection of the stiffness of the connectors of the photovolta-ic structures studied in this paper.
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