资源约束下城市轨道交通基础设施维修任务安排优化模型

针对城市轨道交通基础设施系统组成复杂、维修任务繁多、维修资源有限的特点,在分析不同类型维修任务需求的基础上,研究资源约束下基础设施维修任务的长期安排方法.考虑作业工队、维修设备等限制条件,建立基于混合整数规划的优化模型以安排任务的开始时间和持续时间,实现任务执行费用和惩罚费用的最小化.通过引入作业时间占用约束以减少任务...

Maintenance Arrangement Optimization for Infrastructure Systems of Urban Rail Transit Considering Resource Constraints

Due to the complex system composition, various maintenance tasks, and limited maintenance resources of urban tail transit infrastructure systems, a long- term maintenance task arrangement method is proposed considering attributions of tasks and constraints from resources. An optimization model based on mixed-integer programming is established to minimize the total cost by arranging the start time and execution period of maintenance tasks with various types. The occupation penalty is imported to reduce the task conflicts and improve the maintenance arrangement. A parallel hybrid algorithm combining the commercial solver and a heuristic method is designed for solving the large-scale problem with complicated constraints. The case study verifies the importance of task occupation on improving the executability of the maintenance arrangement. The proposed method can save the total cost by coordinating various types of maintenance tasks and provide decision support for arranging long- term maintenance tasks on urban rail transit infrastructure systems.