Analysis Of Safe Time Window For Ships Entering And Exiting Dalian Port Based On Hydrometeorological Forecast

In recent years,with the development of domestic and foreign shipping industry and the continuous increase of international trade import and export volume,the number of ships entering and leaving ports in China has become increasingly heavy,and the entry and exit environment and conditions have become increasingly complex,with increasing difficulty and intensity.In this context,the current efficiency of most ports’ entry and exit is no longer sufficient to meet the development needs of ports,and the phenomenon of ship pressure and port pressure often occurs.How to improve port scheduling efficiency is worth intensive research.However,actual investigations have found that the scheduling of port ships entering and leaving the port is mostly manual or based on experience.The current and future hydrological and meteorological information display of the port is not intuitive enough.When determining the safe entry and exit time of the port and ships,the process is cumbersome,time-consuming,and due to errors,there is a certain waste of resources,which creates a certain burden on the work of personnel related to the entry and exit ships and reduces the efficiency of port work.This thesis first provides a detailed introduction to the hydrological and meteorological characteristics,channel environment,and berth environment of Dalian Port,identifies the influencing factors of ship entry and exit hydrological and meteorological conditions,and analyzes the characteristics of ship entry and exit time through ship AIS data.Then,based on the business management regulations of the maritime department and existing risk level research methods,combined with the hydrological and meteorological data of Dalian Port,actual research data,and communication with relevant experts,the main influencing factors that affect the safety of ships entering and leaving the port are judged and analyzed,and the classification criteria for the meteorological risk level of ships entering and leaving the port are determined by integrating information.Next,a simplified process for safe entry and exit of ships is proposed through risk level classification and ship entry and exit procedures.Using Python language and PyCharm compilation environment,programming modeling is carried out using three classic waterways in Dalian Port as examples.Combined with hydrological and meteorological forecast data,the time window for safe entry and exit of ships is determined,and the risk level of ship entry and exit is graded and displayed,indicating the risk factors of safe critical state.Finally,the model was validated and modified through a hundred searches of actual data from ships entering and exiting the port in a strong wind environment,improving its accuracy and basically meeting the requirements of port ship scheduling.The model can assist ships in arranging and scheduling in a timely and effective manner,providing reference for ports and ships,and reducing the economic and time losses caused by ships missing entry and exit times.Through actual research and communication with relevant experts,it has been found that there are basically no relevant applications in ports.This research is of great significance in improving port scheduling efficiency,enhancing the ability to solve sudden problems of ship entry and exit,improving the safety of relevant operators,and reducing losses for shipping companies.