ANALYSIS OF THE INFLUENCE OF AN ABSOLUTE ACCELERATION ON THE SPEED OF MOVEMENT OF PASSENGER TRAINS
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2018, Vol 181, Issue 15
Abstract
Increasing the speed of traffic on existing lines with minimal costs is one of the main tasks that exist today on the Belarusian Railways. The nearest high-speed prospect is 160 km/h. Often the existing curves of small radii restrain the increase in the speed of passenger trains. As one of the main criteria for determining the speed of motion in the curves is the unrestricted acceleration – aаа, m/s. For passenger trains aаа is assumed equal to 0.7 m/s2. This criterion is a characteristic of the smooth running and the condition of riding comfort. You can increase the speed in curves in several ways: for example, by increasing the elevation of the outer rail, by raising the rate of unprecedented acceleration, etc. The first option requires lengthening the transition curves and re-laying the track, which is expensive and not always possible. In particular, it is difficult to do on lines with intensive cargo transportation. The second solution to the problem has much more opportunities to be realized. The article considers one of the options for increasing the speed of passing curves by increasing the permissible limit of the unrestricted acceleration to 0.9 m/s2. Experimental studies have established that the long-term and repeated impact of an unprecedented centrifugal acceleration up to 0.9 m/s2 inclusive, most people tolerate satisfactorily, while the speed of passenger trains can be increased by 10-20 km/h depending on from the radius of the curvilinear section of the path. Consequently, the rate of passage of existing curves will change upwards with a minimum investment. In this case, a change in the magnitude of the outstanding acceleration in a large direction should not be accompanied by the deterioration of the passengers. If this condition is met, there is an adjustment of the scientific and technical documentation existing on the Belarusian Railways.
Authors and Affiliations
Pavel Kovtun, Tatyana Dubrovskaya
Keywords
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- EP ID EP533480
- DOI 10.18664/1994-7852.181.2018.156307
- Views 68
- Downloads 0
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