Hydrodynamic Performance Study Of Floating Multi-body With Connector

With the exploitation of marine resources,traditional single body of the ocean structure has been unable to meet people's needs.Various kinds of marine structures have emerged.These multi floating structures are connected by a wide variety of connections.The floating body can be rigid or elastic body,connecting pieces can be articulated or complex connection.A general method for studying the dynamic response of a multi-floating body with a connecting piece is studied.The model are Pelamis wave energy converter(WEC)and hinged very large floating structures(VLFS)with the method 3-D potential theory in frequency domain.At first,this paper studies the generation efficiency of Pelamis wave energy converter.the motion equation is established based on linear potential theory.Considering the displacement constraints between the two pontoons,the dynamic response of the Pelamis-like WEC can be calculated in both regular and irregular waves.Based on the calculated results,the effects of wave frequencies,wave directions,the damping coefficient of the PTO system,as well as the geometric quantities on the power capture performance of the Pelamis-like WEC are studied in detail.Then,a new method for calculating the hydrodynamic response ofVLFS is proposed based on the theory of multi-body and structural mechanics.In the frequency domain,the motion equation of a multi-floating body is established,and the influence of the structure is taken into account.The motion response of a VLFS is obtained by directly solving the equations of motion.Then this method is used to study hinged elastic structures.