长大下坡道区段限速对有轨电车旅行时间影响的计算与仿真研究

Calculation and Simulation of Segment Speed Limit Influencing Tram Travel Time on Long-large Downhill Ramp

目的:我国西南地区的有轨电车线路大多存在长大坡道。为了保证长大下坡道上有轨电车的运行安全,有轨电车需限速运行,进而影响旅行时间。对此,需要研究长大下坡道区段限速对有轨电车旅行时间影响。方法:基于有轨电车牵引计算及区间运行时间计算,通过Opentrack软件构建区间运行仿真模型。以丽江有轨电车1号线为例,使用优化求解器计算得到长大下坡道区段在不同限速方案下的有轨电车最小运行时间。基于区间运行仿真模型进行线路仿真试验,核算区间通过能力,进而定量分析不同限速对列车通过旅行时间的影响。结果及结论:由仿真试验结果,若长大下坡道的列车限速减小50%,则线路通过能力降低约17%。长大下坡道的限速越小,则列车通过旅行时间越长,区间的通过能力越小。

Objective:Many tram lines in the southwest region of China have long-large downhill ramps.To ensure the safe operation of trams on long-large downhill ramp,speed limits need to be imposed,which in turn affect the travel time.Therefore,it is necessary to study the impact of long-large downhill ramp segment speed limit on tram travel time.Method:Based on tram traction calculation and interval travel time calculation,a simulation model for interval operation is constructed using Opentrack software.Taking the example of Lijiang Tram Line 1,the minimum tram travel time in different schemes of long-large downhill ramp segment speed limit is calculated using an optimization solver.Based on the interval operation simulation model,a route simulation test is conducted to evaluate the segment passing capacity and further quantitatively analyze the impact of different speed limits on train travel time.Result&Conclusion:Based on the simulation test results,if the long-large downhill ramp speed limit is reduced by 50%,the line passing capacity decreases by approximately 17%.The smaller the speed limit,the longer the train travel time and the lower the capacity of segment passing.