Vehicle Routing Problem of Emergency Logistics Considering the Demand Urgency

Since the 21st century, the world has been frequently attacked by a variety of large-scale emergencies which have not only caused casualties, but also brought huge economic losses. In order to improve the utility of emergency resources, this paper firstly analyzes the vehicle routing problem of emergency logistics, constructs the evaluation index system of material demand urgency, and then introduces demand urgency as the influencing factor of the vehicle routing problem. Referring to the standard of logistics industry under development, the total distribution cost of the logistics enterprise is constructed, which consists of vehicle running cost, penalty cost of delivery delay, and subsidy cost without delay of distribution. Second, the model of emergency logistics vehicle routing problem is constructed, and the model is solved by using genetic algorithms and example data. Finally, the correctness and validity of the model and algorithm are verified.