Research On The Influence Of LNG Vessels On The Navigation Efficiency Of Wide-width Incoming Navigation Channels

With the increase in the number of LNG ships,the issue of the influence of LNG ships on navigation efficiency has become the focus of current research.Currently,regarding the navigation efficiency of LNG ships,domestic and foreign scholars mainly study the LNG ship’s exclusive navigation and LNG ship traffic control.The research point focuses on the evaluation of the navigation impact rate of LNG ships,and there is a relative lack of research on the ship transportation mechanism and the theoretical model of the LNG ship influencing the navigation channel.In order to explore the impact of LNG ships on the navigation efficiency of navigation channels,this paper studies three aspects: LNG ship’s impact on the channel traffic mechanism,LNG ship navigation efficiency loss model and case studies.The paper’s research work as follows:(1)Analysis the influence mechanism of LNG ships on waterway traffic.A qualitative analysis of the navigational risks of LNG ships was carried out to extract the navigational risk factors of LNG ships.A hierarchical model of LNG ship safety zones was constructed based on this,and the influencing factors of LNG ship safety zones were identified using fuzzy analytic hierarchy process based on Monte Carlo simulations.Explore the impact of LNG ships on ship traffic in navigation channels in the mechanism level,(2)Construct a loss model for navigation efficiency of ships in navigation channels under the influence of LNG ships.Analyze the LNG ship’s one-way navigational traffic process,extract evaluation indicators of LNG ship’s impact on ship traffic within the navigation channel,and use probabilistic knowledge to solve the loss of LNG ship’s navigation to the navigation channel and the delay time of the ship,and construct the LNG ship to the same direction.Based on the traffic loss model of traffic flow,reverse traffic flow,and traffic flow,based on this model,the LNG ship’s loss efficiency model for the influence of navigation traffic in the bifurcation channel is further simulated.Finally,a sensitivity analysis method is used to initially analyze the impact of the LNG ship.Main Influencing Factors of Loss Efficiency Model for Navigation Channel Navigation.(3)A case study of navigational efficiency loss model under the influence of LNG ships.Taking the LNG ship of Jiaxing Port as an example,the navigation loss loss model is used to calculate the traffic loss and delay time of the LNG ship in the affected navigation channel.According to the results,the traffic flow of the channel is mainly considered in the entry and exit of the LNG ship,and the results are compared with simulation experiments.Analysis,the results show that the difference between the two within 20%.The paper establishes a navigation loss efficiency model under the influence of LNG ships.It provides a new method for quantifying the impact of LNG ships on ship traffic in navigation channels.It can provide theoretical support for the planning of LNG terminal location planning.At the same time,the results of the study can provide the basis for the optimization of the traffic organization for the entry and exit of LNG ships.