TECHNICAL MECHANICS
ISSN (Print): 1561-9184, ISSN (Online): 2616-6380
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UDC: 625.214
Technical mechanics, 2014, 1, 59 - 66
STIDIES IN EFFECT OF INCREASE IN DIAMETERS OF BODY CENTRAL BEARING AND THRUST BEARING OF FREIGHT CAR ON ITS DYNAMIC PERFORMANCE ON CURVED TRACKS
Reznik D. O.
| ABSTRACT |
The paper focuses on evaluation of the effects of increased diameters of the center plate and center bowl
of the freight car running on curves on its dynamic qualities. During the last decades the research in
improvements of some units and elements of the 18-100 type bogies was carried out very actively in Ukraine.
However, most upgrades were aimed mainly at improving only the normalized indexes of dynamic qualities
of the car. The pur-pose of this paper is to examine the possibility of reducing an unnormalized angle
of rolling the car body relative to the bolster by changing the diameter of the center plate and center
bowl of the freight car. This objective is achieved by applying statistical methods of the research using
a computer simulation. From the results of the study it was concluded that a change in diameters
of the center plate and center bowl does not affect the regulated parameters of the dynamic qualities
of the cars equipped with both standard and comprehensively retrofitted bogies running on curves.
Also, an increase in the diameter of the center plate from 300mm to 500 mm has a little impact
on the rolling angle of the car body with standard bogies running on curves of 200-400 m radius.
The rolling angle of the car body equipped with comprehensively retrofitted bogies with different
models of slides is little dependent on the diameter of center plates on curves of small radius (200 m).
In so doing the rolling angle of the body is reduced, on average, by 15-20% for running the cars
equipped with retrofitted bogies at a speed over 60 km/h on curves of 300-400 m radius. The research
results show the effectiveness of changed diameters of center plates and center bowls. The research
is valuable for railway transport and primarily for Ukrzaliznytsya as reduction of the rolling angle
of the car results in an improved safety of the car
| KEYWORDS |
dynamic qualities of car, diameters of body central bearing and thrust bearing, decrease in unnormalized angle of rolling the car body relative to bolster, statistic methods of studies using computer simulation
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| REFERENCES |
1. Complex retrofit of running gears of freight cars (in Russian) / V. F. Ushkalov, T. F. Mokriy, I. Yu/ Malysheva, I. A. Mashchenko, S. S. Pasichnik // Vagonnyi Park. – 2007. – No 2. – P. 18 – 22.
2. Ushkalov. V. F. Studies of effects of increase in diameters of body central bearing and thrust bearing of freight car on its dynamic performance (in Russia) / V. F. Ushkalov, T. F. Mokriy, D. O. Reznik // Tekhnicheskaya Mekhanika. – No 4. – 2012. – P. 3 – 7.
Copyright (©) 2014 Reznik D. O.
Copyright © 2014-2018 Technical mechanics
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