Original scientific paper
Methodology for Determining of Train Curving Resistances With Respect to Vehicle Mass and Speed
Jovan TEPIĆ
; Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
Milan KOSTELAC
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Zvonko HEROLD
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Abstract
A methodology for determining curving resistances of track vehicles is
proposed. The methodology is aimed to gain insight into influence of the
arrangement of masses along the train and the train speed on the curving
resistance based on test results conducted by using a scaled down train. The
utilized scaled down train is a HO scale line freight train in ratio of 1:87
consisting of a EMD SD 35 locomotive and FALNS 121 freight wagons.
The considered variants of the train arrangements are as follows: empty
train (PPPPPP), one loaded wagon in the front/in the end (TPPPPP and
PPPPPT) and two loaded wagons in the front/in the end (TTPPPP and
PPPPTT). The total train curving resistance WR is determined based on
the decrease of the train steady-state curving speed vR when compared to
the train steady-state speed on the straight track v∞ under same operating
conditions. The curving resistance of a train of arbitrary arrangement is
calculated as the difference between the train driving force when driving
on a straight, horizontal track FV (constant resistance WS) and the total
resistance when curving WU (driving force FV in curve). The constant
resistances of the locomotive and empty and loaded wagons are determined
by application of the gravitational method.
Keywords
Constant resistance; Curving resistance; Gravitational method; Mass; Speed
Hrčak ID:
56784
URI
Publication date:
31.12.2009.
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