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Chinese Journal of Management Science ›› 2025, Vol. 33 ›› Issue (3): 231-238.doi: 10.16381/j.cnki.issn1003-207x.2022.1547

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Hub-and-spoke Network Optimization Method of China Railway Highspeed Express Based on Distriutionally Robust Optimization

Shuangsong Xu, Kanglin Liu()   

  1. School of Traffic and Transportation,Beijing Jiaotong University,Beijing 100089,China
  • Received:2022-07-15 Revised:2022-11-18 Online:2025-03-25 Published:2025-04-07
  • Contact: Kanglin Liu E-mail:klliu@bjtu.edu.cn

Abstract:

IIn the practice of China Railway High-speed(CRH) Express, the uncertainty of supply and demand and the unreasonable setting of freight nodes greatly increase the total cost of CRH Express transportation. In this paper, the economy of hub construction and transformation and the operation of the existing high-speed rail network are comprehensively considered. Within the framework of a hub-and-spoke network, a distributionally robust optimization approach is employed to account for demand uncertainty. Furthermore, the optimization model is formulated as a mixed-integer second-order cone programming problem. Because of the low efficiency of solving the nonlinear mixed integer programming directly, the outer approximation (OA) algorithm is introduced. Numerical experiment results show that OA algorithm can effectively improve the solving efficiency. The simulation results demonstrate that the distriutionally robust model achieves a more stable network system, improving both the reliability and operational efficiency of high-speed rail freight network, which provides valuable managerial insights for the hub location planning in the CRH Express network.

Key words: high-speed rail express network optimization, distriutionally robust optimization, hub-and-spoke network location model, outer approximation algorithm

CLC Number: