Qu Zhijian, Liao Xinyu, Chi Rui, Wei Baoquan, Hou Xinxing
State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, Jiangxi Province, China.
Electrical and Automation Engineering Collage, East China Jiaotong University, Nanchang, Jiangxi Province, China.
PLoS One. 2025 Jun 3;20(6):e0321384. doi: 10.1371/journal.pone.0321384. eCollection 2025.
With the gradual expansion of China's high-speed railroad operation scale and the accumulation of operation time, the pressure of operation and maintenance of contact networks is increasing, and the operation and maintenance strategy of railroad contact networks under the traditional cyclic maintenance mode has the double dilemma of low maintenance efficiency and high labor intensity of maintenance personnel. In order to protect the transportation quality and efficiency of high-speed railroads and reduce the labor intensity of maintenance personnel, this paper proposes a multi-objective optimization operation and maintenance strategy for contact networks considering integrated state parameters, which is able to ensure the high reliability of contact networks while reducing the cost of maintenance and reducing the man-hours required for maintenance. Firstly, according to the integrated state parameters such as the guide height, contact force, pull-out value, and remaining useful life (RUL) of contact networks, the state of contact networks near specific towers is analyzed, revealing the initial reliability of the main equipment including contact wires, positioners, hanging strings, etc., which is used as a parameter of the multi-objective optimal maintenance model. Then, a multi-objective optimal maintenance model is established to achieve the optimization goal of high average reliability of contact networks, low maintenance cost and short required working hours. Finally, the model is solved by the multi-objective optimization algorithm to obtain a series of maintenance solutions in the form of Pareto non-inferior solution sets. Simulation calculations with data from a railroad bureau in southern China yielded that the average reliability of the contact networks system was 0.969, and the maintenance cost was 1,029 thousand yuan, spending 71 man-hours, when the maintenance method generated by the operation and maintenance strategy mentioned in this paper was used. Compared with the traditional maintenance method, the maintenance scheme obtained by the proposed in this paper optimizes the required man-hours and improves the labor productivity while maintaining higher reliability and lowering the maintenance cost.
随着中国高速铁路运营规模的逐步扩大和运营时间的积累，接触网的运维压力日益增大，传统周期性检修模式下铁路接触网的运维策略存在检修效率低和检修人员劳动强度大的双重困境。为保障高铁运输质量和效率，降低检修人员劳动强度，本文提出一种考虑综合状态参数的接触网多目标优化运维策略，该策略能够在降低检修成本和减少检修所需工时的同时，确保接触网的高可靠性。首先，根据接触网的导高、接触力、拉出值和剩余使用寿命（RUL）等综合状态参数，分析特定杆塔附近接触网的状态，揭示包括接触线、定位器、吊弦等主要设备的初始可靠性，将其作为多目标优化检修模型的一个参数。然后，建立多目标优化检修模型，以实现接触网平均可靠性高、检修成本低和所需工时短的优化目标。最后，通过多目标优化算法求解该模型，得到一系列以帕累托非劣解集形式表示的检修方案。利用中国南方某铁路局的数据进行仿真计算得出，采用本文提出的运维策略生成的检修方法时，接触网系统的平均可靠性为0.969，检修成本为102.9万元，花费工时71小时。与传统检修方法相比，本文提出的检修方案在保持较高可靠性和降低检修成本的同时，优化了所需工时，提高了劳动生产率。
