Abstract
Several train model input variables, such as running resistance, line voltage, adhesion, braking release time and braking gain time, are studied in this paper. An analysis is performed on how the variations in the variables impact relatively on calculated energy usage and running time of trains. The paper shows that for the calculation of energy usage the simulations are most sensitive to variations in running resistance, followed by line voltage, adhesion, braking release time and braking gain time. For the running time, the study shows that variation in mechanical rolling resistance and air drag has a relatively small influence provided that the tractive force is big enough. If the line voltage and adhesion, which affect here the tractive force, drop below certain levels the running time increases dramatically. The braking release and gain times have little influence on the running time. The results also show which variables should be paid extra attention to, when constructing a train model.
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