Modeling the transition process of railway track irregularity and its application to the optimal decision-making for multiple tie tamper operations

Through appropriate maintenance activities, railway track irregularities must be kept at a satisfactory level with the optimal cost. In practice, however, most of maintenance strategies focus only on sustaining railway track irregularities at a necessary level, as it is difficult to treat quantitatively. In order to determine the maintenance strategies effectively, a statistical modeling approach was used to deal with historical data of railway track irregularities and apply it to the optimal decision-making for the railway maintenance strategies. The transition process of the surface irregularity with historical data obtained from track geometry measuring cars was investigated. From the statistical data analysis, a degradation model and a restoration model were developed. Next, in order to obtain optimal maintenance strategies based upon both maintenance costs and level of surface irregularity for riding quality and safety, a mathematical programming model is proposed to determine an optimal tamping operation schedule of a multiple tie tamper (MTT). Actual data confirmed that the model is effective and useful. For the covering abstract see ITRD E125214.


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  • Accession Number: 01011757
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-947644-43-1
  • Files: ITRD
  • Created Date: Dec 19 2005 3:29PM