Simulation With Arena For Intermodal Freight Transport System With Seaport And Railway Terminals In Container Import And Export Replacement Operation

With the growth of economic globalization,intermodal transportation mode has received considerable attention in recent years.For global trade,intermodal transportation can provide a more flexible service,as well as more reliable,profitable and sustainable transport instead of single-modal long-haul transportation.Rail-sea combination is more attractive due to strictly schedule-based operation,low carbon emission,undertaking bulk commodity and main-line transport task.the sea-railway intermodal freight transport system(SRIFTS)is the key node linking railway transportation and waterway transportation.In the container import and export replacement operation process,it involves a wide range of facilities and equipment.Studying the facilities and equipment of the sea-railway intermodal freight transport system(SRIFTS)not only affects the efficiency of container handling and handling at the port station,but also has a great influence on the progress and efficiency of the overall operation of the sea-railway intermodal freight transport.The study described in this paper attempts to develop a simulation platform for evaluating and optimizing the sea-railway intermodal freight transport system(SRIFTS)on the basis of economic considerations.The operation process of SRIFTS is thoroughly analyzed from aspects of import container & export container replacement operation with railway and inland waterway.And then the optimization model of SRIFT based on fixed shunting locomotive cost,import container detention cost and export container detention cost is formulated.To achieve this objective given by the mathematical formulation,the simulation platform encompassing the two typically layout modes of SRIFTS is developed by Arena software and the hierarchical structure of this simulation module is respectively outlined in the simulation platform.Finally,the simulation platform is carried out by concrete examples,which proves the rationality of the methodology in applying the output from the simulation program results to assessing the impacts produced by the adoption of different policies and enhancing the performances of the SRIFTS.The results show that the number of wagon and the number of locomotives have an impact on the sea-railway intermodal freight transport system(SRIFTS)under different kinds of hub layout and different container throughput.The main performance follows two aspects: firstly,in the flat peak stage of container throughput,the optimization of the number of wagons can improve the evaluation indicators of TOC with the reasonable allocation of locomotive.secondly,In the peak stage of container throughput,the number of locomotive and the number of wagons can affect the evaluation indicators of the simulation system,and the effect of optimizing the number of locomotives is obviously better than the effect of optimizing the number of wagons.The research work of this paper provides help and support for the management of the sea-railway intermodal freight transport system(SRIFTS).