Research on the optimization of train operation plans for urban rail transit based on passenger travel characteristics and comprehensive cost equalization
Based on passengers'travel characteristics and line operation characteristics,this study establishes a multi-objective nonlinear integration optimization model aiming to achieve the optimal combination of passenger waiting time,vehicle utilization time and travel kilometers.The model takes the train frequency and the location of turnback for part routes as the key decision variables.To simplify the issue,the indicators are converted to the total cost by a linear weighting method,thus simplifying the original model to a single-objective optimization model.Taking line A of Beijing metro as an example,we study in depth how to find the train operation plan with the lowest equilibrium total cost.The results of the study show that compared with the conventional route train operation plan,the full and part routes operation plan that accurately matches the passenger travel characteristics could significantly reduce the overall operating cost by up to 11.9%;when comparing the full and part routes train operation plans with different coverage areas and intervals,it is found that the more accurately matching the passenger travel characteristics,the lower the total cost of the plan,meeting passengers'demands while efficiently avoiding the waste of the transportation capacity;when the operating section of part routes is too short,it will make passengers travel inconvenient and cannot further reduce the operating cost of the enterprise.
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