Numerical Simulation Of Flow Field And Study Of Mooring Safety On Xinrun Wharf

With the development of world trade,Ningbo port develops very rapidly.As an important distribution center of domestic liquid chemical products,its liquefied products handling capacity is saturated,and its liquefied products berth shoreline is extremely limited.Its traditional operation area will be update and rebuild.In the future,there will be a certain gap in the capacity of third-party liquefied products handling.In order to make the port develop healthily and improve the comprehensive competitiveness of the port,Ningbo Xinrun Petrochemical Storage and Transportation Co.,Ltd relying on using the hydraulic part of the original Xinrun wharf,has rebuilt and expanded a 50,000-ton liquid chemical product wharf and corresponding supporting projects.Furthermore,in order to ensure the rationality of wharf rebuilt,It is necessary to study the safety of ship mooring.There are many factors affecting the safety of ship mooring,among which the water flow factor can not be ignored.Because of the complex and changeable water flow around Xinrun wharf and frequent vessels,it is impossible to lay out too many measured points,coupled with less hydrological data,and the flow field after the rebuilt and expansion of the wharf is also unknown.Therefore,in order to ensure the mooring safety of Xinrun wharf,it is necessary to carry out numerical simulation of its flow field.Only by fully grasping the hydrological elements around the wharf,can we adopt effective mooring scheme to ensure the safety of ships.This thesis is firstly based on the detailed study of the physical design of Xinrun wharf rebuilt and expansion scheme and the hydrological environment around the wharf,through field investigation and related literature,the hydrodynamic model is built by using MIKE software,Then verifying the accuracy and validity of the model.Secondly,the tidal level and velocity in the large,medium and small tides around Xinrun wharf are obtained by using the model,and the flow field after the wharf project is simulated by using the method of "pile group resistance".It is found that the overall change of the flow field is small,and the size of the current speed is only slightly reduced.Finally,the MIKE simulated post-engineering tidal current data are applied to OPTIMOOR software model,the mooring safety simulation platform is constructed,build mooring safety simulation platform and designing a series of experiments under various working conditions,and quantitative analysis of the influence of wind,wave and current on the mooring vessel of Xinrun wharf.The comprehensive safety evaluation method is selected,and the ship mooring force,ship motion and fender impact force are taken as evaluation criteria.Then obtain risk term and risk distribution of mooring vessel in Xinrun wharf,and an effective mooring scheme is given.Through the combination of hydrodynamic numerical model and mooring safety model,not only obtain the mooring scheme of ships,but also provide reference for the berthing and unberthing of ships in waters and the design and rebuilt of wharfs.