综合运输网络上多货类流量最短路分配

Shortest Path Distribution of Multi-class Cargo Flow on a Comprehensive Transport Network

针对综合运输网络资源合理配置的需求,分析了综合运输网络上影响路径选择行为的用户偏好体系,并将其概括成客观类、主观类和调控类。在给出选择偏好在路径选择模型中的表达方法基础上,阐述了采用改进的最短路加载方法进行多货类运输流量分配的思路和执行流程,并面向可持续发展政策导向的运输网络规划,引入"诱导参数"对处于合理路径集中的联合运输路径进行优先选择。最后通过算例分析了不同"诱导参数"对双货类网络流量分布的影响,从政策调控的角度为综合运输网络宏观布局的评价模型提供理论参考。

Aiming at the network resources optimization demand in a coordination transportation system , the constitution of user preferences in freight transport route-making was divided into three classes： objectivity , subjectivity , and policy. Corresponding expressions were suggested in the route choice model. The frame of an improved shortest path loading method was proposed for assigning multi-commodity transportation flows in multimodal networks. Based on this model,a guiding parameter was employed for enhancing the priority of the combined transport routes oriented to sustainable transportation planning. An calculation example was given to show the influence of freight flow distribution in a double commodity network. That provides a modeling reference for evaluating the multimodal network from the perspectives of policy regulation.