Construction Of Air Freight Network Based On Hub Operation

The air freight network based on hub operation is a modern way of cargo transportation,which can improve the efficiency and accuracy of cargo transportation.The centralized cargo handling of the hub can effectively reduce the time cost of transit and transportation and increase freight capacity.It is very important to construct a route network based on hub operation for air cargo production.The theory and method of traditional hub network location are expanded,and the construction method of air cargo network based on single-layer hub and double-layer hub operation is proposed,and the hub location model of air cargo network is established.Secondly,according to the structural characteristics of the established model and network,a solution algorithm for large-scale examples is designed.Finally,the proposed air cargo network optimization method based on hub operation is applied to the actual air cargo transportation system in China.The main work is as follows :(1)The construction of air freight network based on single hub operation.Firstly,based on the complete-star structure,the hub route network is constructed.Taking the minimization of the total cost of the network as the optimization objective,a capacity-constrained singleallocation p-hub median location model is constructed.Secondly,in order to further solve largescale examples in a relatively short time,combined with the advantages of immune algorithm and genetic algorithm,a hybrid algorithm is designed to solve the problem.Finally,the data in the actual operation process of SF Airlines are used for numerical experiment analysis.The experimental results show that the hub route network can effectively reduce the operation cost.(2)The construction of air freight network based on double hub operation.Firstly,based on the complete-star-star structure,the hub route network is constructed,and a double-level air cargo network hub location planning model considering the hub level and the connection strategy between the central hub and the ordinary hub is constructed to minimize the total cost including construction cost and transportation cost.Secondly,in order to effectively solve largescale problems,a genetic algorithm is designed to solve large-scale networks.Finally,the model and algorithm are verified by the data in the actual operation process of SF airlines,and compared with the single-layer hub route network constructed above,it is proved that the multilayer hub freight route network constructed has more cost advantages.