关键词: 危险货物运输, 铁公联运, 办理站选址, 整数规划, 多目标优化

Abstract: To improve the efficiency and safety of railway departments for transporting hazardous materials,the multi-objective transfer station location problem with multi-class material,station capacity and delivery deadline was considered for rail-road intermodal transportation of hazardous materials.The location for each type of hazardous material transfer station from given candidate sites was selected,and the transportation route for each material in the constructed intermodal network was determined.Aiming at minimizing the total cost and total risk in transportation,transfer and location processes,a bi-objective 0-1 linear programming model with node-arc multi-commodity network design formulation was formulated.Compared with the hub location model widely formulated by existing works,the proposed model could reduce the model size significantly,and also exhibits a more compact structure.By exploiting the characteristics of the problem,an augmented ε-constraint algorithm was customized to balance the two objectives and find representative non-dominated solutions.A large-scale realistic case was constructed to test the effectiveness and efficiency of the proposed approaches.Computational results demonstrated that the augmented ε-constraint algorithm using the formulated model could find high quality representative non-dominated solutions within a reasonable time.Meanwhile,the algorithm was better than the weighted-sum algorithm widely employed in related works in terms of the number and uniformity of distinct non-dominated solutions.

Key words: hazardous materials transportation, rail-road intermodal transportation, transfer station location, integer programming, multi-objective optimization