Hydrodynamic Analysis And Mooring Scheme Design For Double Ship Mooring In Large Ship Terminals

With the improvement of modern shipbuilding technology,the construction period of ships has been greatly shortened and the number of newly built ships at shipyards has increased.With limited terminal resources,major shipyards at home and abroad often use quay double ships or even three ships side by side.Mooring methods to improve terminal utilization.In order to ensure the safety of mooring of quay terminals under typhoon and other severe sea conditions,especially the mooring safety of ships in the middle position,it is necessary to study the typhoon mooring scheme against typhoon quay to ensure that the quays are moored side by side in typhoon.It is safe and stable under adverse sea conditions.Due to the special nature of the double berthed berthing of the quay berths,which is very different from the single berthing,the mutual coupling between the two ships has a great influence on the arrangement of the ship in the middle position and the overall mooring line arrangement,taking into account.The irregularity of the superstructure increased the movement of the two boats in six degrees of freedom.In the case of typhoon and other severe sea conditions,the movements of the middle ship are the most complex and the safety problems faced by the outer ship are the most prominent.Therefore,it is particularly important to study the hydrodynamic characteristics and mooring patterns of the two vessels.The main research content is as follows:(1)Combining the actual conditions of a domestic shipyard,two 170,000-ton bulk carrier wharves are moored side by side as the research object.Firstly,the hydrodynamic parameters such as wind load and flow load of the moored ships at the wharf are determined,and the hydrodynamic forces of the multi-buoys at the wharf are determined.The characterization study,while using AQWA hydrodynamic analysis software to simulate the hull mooring two hulls,taking into account the interaction of the hydrodynamic forces,it is concluded that in the influence of different water depths,draughts,and the distance between the two ships,the internal ship is attached Quality,radiation damping,and effects of first-order wave excitation and steady-state drift forces acting on internal vessels.(2)According to the conventional dock mooring rules and international norms for large vessels,the number of mooring lines and the selection of mooring lines are determined by the calculation of the number of mooring vessels,and the number of mooring lines and the arrangement of cables are then used.Analyze and gradually optimize the layout of the cables.Summarize the movement rules of the double berths moored along the quay.Finally,determine the two basic dock berthing schemes,namely the general mooring scheme and the anti-typhoon mooring scheme under typhoon resistance.(3)In this paper,the time-domain dynamic coupling analysis of the quay-ship tandem mooring system under the severe sea conditions that may occur is also studied.The dynamic response of the two vessels under the interaction and the time history of the cable tension are studied.The Fourier transform is applied to these two vessels.Responsive to spectrum analysis,study the influence of each frequency response component on the motion response,analyze the reliability of the designed double wharf side-by-side mooring system under the extreme sea conditions that may occur,and propose a cable reinforcement measure under dynamic response for follow-up.Docks are moored side-by-side for reference.