不同吨位车辆的混合运用策略研究

A Study on the Simultaneous Utilization Strategies of Vehicles of Various Capacities

在货物到达分布已知的前提下,采用数值模拟手段研究若干种不同吨位车辆(即大型车、小型车、中型车)混合运用策略下的运输成本与运输服务水平,并提出有针对性的车辆混合运用策略。研究表明,中型车适于在场站货物待运规模偏小的情形下使用,有效使用中型车有助于缩短货物的场站待运时间;此外,运用中型车时应注意平衡成本支出和服务水平间的关系。

The paper concentrates on the simultaneous utilization of vehicles of various capacities and aims especially to ascertain the necessity of using medium-capacity vehicles. Vehicles here can be trains, road trucks or vessels, and their capacities range from large, medium to small. Probability distribution of freight for transportation provided, this paper studies the transportation cost and service level of vehicles of various capacities m simultaneous utilization strategies with the method of numeral simulation. The experiment reveals that the use of medium-capacity vehicles can help decrease freight＇s waiting time at depots when the scale of freight for transportation is small. It＇s essential to balance the transportation cost and service level when medium-capacity vehicles are utilized.