Research on vehicle scheduling optimization model under earthquake disaster conditions considering delay time

Abstract：Delays of material distribution due to delays of disaster response and disasters in the disaster area would directly affect the timely delivery of emergency relief materials, and then would affect the disaster relief effect.On the basis of considering the communication interruption and the delay time of material transportation caused by the interruption of transportation network, the vehicle scheduling optimization model under the earthquake disaster condition with the shortest total time of emergency materials transportation was established.The “72 h gold rescue period” was considered in the model to ensure that important relief supplies were delivered to the disaster area within 72 hours.The validity of the model was verified by an example.The results showed that the model prioritized the vehicles with larger load capacity in order to transport more materials to meet the demand.When the total delay time was longer, the total duration of emergency rescue materials transportation was longer, and the shorter the transportation time of all materials was;when the total delay time was constant, the smaller the number of vehicle trips was, the smaller the value was, and the material delivery time got shorter, the vehicle loading rate would get higher.

Keyword：emergency logistics;vehicle scheduling;material allocation;optimization model;