基于虚拟编组技术的城市轨道交通列车联挂与摘挂时距参数研究
肖李蔚宁1,2柏赟1
Temporal-spatial Parameters for Urban Rail Transit Train Coupling and Decoupling Operations Based on Virtual Coupling Technology
XIAO Liweining1,2BAI Yun1
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作者信息:1.北京交通大学交通运输学院， 100044， 北京
2.中铁工程设计咨询集团有限公司， 100055， 北京
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Affiliation:1.School of Traffic and Transportation, Beijing Jiaotong University, 100044, Beijing, China
2.China Railway Engineering Design Consulting Group Co., Ltd., 100055, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20245918
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中图分类号/CLCN:U284.48
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栏目/Col:运营管理
摘要:
［目的］面对日益增长的城市轨道交通客流压力，列车虚拟编组技术在提升城市轨道交通列车运行效率、缓解线路运输能力紧张、适应客流时空分布不均衡等方面具有突出优势，应对其具体时距参数进行研究。［方法］基于传统安全制动模型，建立了城市轨道交通虚拟联挂编队列车安全制动模型，推算出理想条件下联挂编队单元列车间最小安全距离。在此基础上，结合仿真计算，得到了节时操纵模式下列车联挂和摘挂时间、区域长度等时距参数。同时，选取建立车车通信需求时间、区间限速这2个参数，对其进行了灵敏度分析。［结果及结论］在相同行车速度下，虚拟联挂编队单元列车间最小安全距离远小于传统追踪模式下的列车间最小安全距离，且随着行车速度的增加，二者之间的差距会增大。当行车速度在60 km/h时，列车间最小安全距离相比传统追踪模式缩短约75.7%；建立车车通信需求时间对列车联挂影响较大，在30~60 s的车车通信需求时间范围内，列车联挂时间及区域长度的增幅分别达103.4%和100.4%；在保障行车安全的前提下，尽量设置较高的区间最大允许速度，这样更有利于列车应用最优行车曲线运行，缩短列车联挂时间及区域长度。
Abstracts:
［Objective］ In response to the growing pressure of urban rail transit passenger flow, train virtual coupling technology possesses significant advantages in enhancing urban rail transit train operation efficiency, alleviating constraints on line transport capacity, and adapting to uneven spatial and temporal distribution of passenger flow. It is thus necessary to study its specific temporal-spatial parameters. ［Method］ Based on the conventional safety braking model, a train safety braking model for virtually coupled train formations in urban rail transit is established to calculate and derive the minimum safe distance between train units under ideal conditions. Building on this foundation and through simulation calculations, the temporal-spatial parameters under time-saving operation mode, such as train coupling and decoupling duration and zone length are obtained. Furthermore, a sensitivity analysis is conducted on two selected parameters: the time required to establish train-to-train communication and the maximum permissible speed between sections. ［Result & Conclusion］ Under identical train operating speeds, the minimum safe distance between trains in virtually coupled train units is significantly smaller than that in traditional tracking modes, and the increase of train operating speed will cause an increase in the gap between them. When train operating speed is 60 km/h, the minimum safe distance between trains in the former shortens by 75.7% in comparison to the latter. The time required to establish train-to-train communication has a substantial impact on train coupling. With a train-to-train communication range of 30~60 seconds, the increment amplitude of train coupling duration and zone length goes up to 103.4% and 100.4%, respectively. Given that train operational safety is ensured, setting a higher maximum allowable interval speed is more conducive to the optimal curve running of train application, thereby shortening train coupling duration and zone length.
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