Methodological Approach to Conversion Factor Determination of the Available Locomotive Fleet Strength into the Strength of Operating Locomotive Fleet

Changes in the record keeping system of motive power status and utilization indices called for developing new normalization principles of the operating locomotive fleet incorporating available and nonavailable fleets. In this context daily average productivity of available fleet locomotive prescribed for the planned period (a month or a year) turns up to be one of the main budget indices of motive power utilization, since exerting direct influence on the estimated demand of locomotives for the accounting period and eventually on the strength of the operating locomotive fleet. All this calls for knowledge of the norm conversion factor of the available locomotive fleet strength into the strength of operating locomotive fleet, defined by the strength demand ratio of the operating and available locomotive fleets. Classification has been proposed of conversion factors. Also computational model has been developed for determining on a monthly basis norm conversion factor of the available locomotive fleet strength into the strength of the operating locomotive fleet as depending on its main affecting contributors, such as train schedule-based conversion factor of the available locomotive fleet strength into the strength of the operating locomotive fleet, share of the fleet of freight locomotives in working condition attributed to intra-month (daily) nonuniformity of the train movement picture/ locomotive fleet operating allocation provisions and share of the fleet of freight locomotives in working condition forming technological reserve of the Traction Directorate (JSC RZD branch). There is proposed calculation technique of the strength of technological reserve. Based upon experimental monthly schedules regulating provision of trains with locomotive power subject to locomotive run limits there was found functional dependence of the locomotive fleet share forming technological reserve of the Traction Directorate on the main affecting contributors. Validation procedure of the proposed computation method of the monthly norm conversion factor of the available locomotive fleet strength into the strength of the operating locomotive fleet demonstrated that in 95 % of cases its error ranged from 3 to 5 %. So this method may be adopted for practical use.

conversion factor of the available locomotive fleet strength into the operating fleet, classification of factors, computational model of the norm factor, computational method for determining technological reserve of locomotives

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