Research On Vessel Berthing Hydraulic Anti-collision System

With the rapid development of technology, ships have become large-scale, complicated as well as high-speed in order to meet the draft requirement while reducing transportation costs at the same time. As a result, the ship impacting force to the quay when docking is increasing, and this could result to more accidents. When the ship is unmanned or its docking speed overrides the quay’s requirements, destroy to quay and docking equipments is very likely to happen. The calculation of effective impacting energy when docking and the fender design is critical to the quay design. Therefore, studying the impacting force to quay along with designing a anti-collision equipment is of importance.Researches nowadays mainly involve ship impaction to the quay, quay’s impaction deformation, dynamic response of a ship to the quay under wind, sea-wave and current. Ship impaction to the quay when docking is studied in this paper, so is the design of the anti-collision equipment under different impacting forces. Docking force o f different docking speeds, directions, docking ships and rubber fenders are studied in consideration of relative specifications of safe docking, as well as previous investigations and calculations. FEM software ANSYS is utilized to analysis the stress of front-wall of the quay, and an hydraulically anti-collision damping device is designed based on the calculated docking force and the quay stress.Relief valves is used to adjust the pressure in the hydraulically anti-collision damping device, which could set the limit of ship’s impacting force. When actual impacting force is higher than designed force, the relief valve will overflow to maintain the pressure. The required structure dimension is calculated to select the proper hydraulic elements, as well as design the anti-collision system.