Research On The Influence Of Carrying Large Vehicles On The Navigation Safety Of Short-Distance Ro-Ro Passenger Ship

The outstanding feature of ro-ro passenger ships is the motor vehicles that carry automatic fuel.In short distance transportation,on the one hand,due to the relatively short fastening time for crew members before sailing,on the other hand,the captain and crew members of a ro-ro passenger ship are relatively familiar with the working environment and navigation waters,and sometimes are careless in fastening the vehicles.At the same time,in strong wind and wave weather,vehicles are prone to collide,slide,and capsize with each other,leading to the risk of fire or capsizing of the ship.Once a passenger ro-ro ship is in danger,it will bring heavy personal damage and property losses.Therefore,it is very necessary to explore the impact of unburdened vehicles on the safe navigation of short distance passenger ro-ro ships.In this thesis,large vehicles with high risk are selected as the research object to conduct force analysis on vehicles without fastening.According to the factors that affect ship roll and damage the force balance of vehicles,an index system for the study of the impact of carrying large vehicles on the safe navigation of short distance passenger ro-ro ships is established,which consists of 5 first level indicators and 15 second level indicators.Secondly,subjective weights are calculated using the C-OWA operator weighting method based on the data scored by the expert group,and the objective weight of each index is calculated using the entropy weight method.The corresponding combination weighting is performed to obtain the comprehensive weight value.Finally,in order to overcome the problem of maximum membership failure in traditional extension models,a normalization process was conducted,and an improved matter-element extension model was established by introducing an asymmetric proximity function instead of the maximum membership function in traditional extension theory.Therefore,the evaluation results obtained based on this article are more reasonable.Based on the classification of vehicle fastening standards for Ro/Ro passenger ships in the Qiongzhou Strait and the actual situation of vehicle fastening for navigation ships,a RoRo passenger ship "Strait Certain" with vague vehicle fastening standards was selected for example verification.The improved matter-element extension model was applied to its navigation safety impact study,and it was determined that certain binding measures should be taken for the vehicles carried under the situation of wind force 6,Under this condition,the impact level of large vehicles on their navigation safety is "average",and the research results are basically consistent with the actual situation,verifying the effectiveness and practicality of the improved matter-element extension model for this type of navigation safety impact research.According to the characteristics of the Qiongzhou Strait and the situation of Ro/Ro passenger ships,based on the improved matter-element extension model and Matlab GUI platform,the corresponding interface design,data entry and processing work have been carried out,and an evaluation system for the impact of carrying large vehicles on the safe navigation of short distance Ro-Ro passenger ships has been preliminarily developed,realizing the visualization and automation of the system evaluation,making the evaluation model more universal,It provides a certain reference for the binding conditions of other short distance passenger ro-ro ships sailing vehicles.