The influence of constructional and operational factors on indicators of maneuverability of the metrobus
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2018, Vol 82, Issue 2
Abstract
Metrobuses in their design are similar to two-lane and three-lane freight vehicles, the study of maneuverability of which a significant number of works is devoted to. Therefore, in order to assess the maneuverability of the metrobus, it is necessary to use two, namely, the overall traffic lane and the possibility of reverse movement. The least studied for today is the question of the possibility of moving backwards of auto trains. However, this question regarding metrobuses is not decisive, since metrobuses move along separate allocated lanes. In the article, the indicators of maneuverability of the metrobus were determined on the elastic wheels in the lateral direction with the help of a system of equations, which allowed to investigate the behavior of the three-block metrobus in both stationary and non-stationary modes of motion. The solution of the system of equations is carried out with the help of the Maple 14 software. The calculations are made for a three-lane metrobus consisting of a three-axle bus with a total weight of 24 tons and combinations of two-axis unmanaged and triple controlled trains with a total weight of 16 tons. It is established that the reduction of the parameter c i.e. the distance from the point of the coupling of the bus with the first trailer from 1.0 m to 4.0 m leads to improved metrobus maneuverability. Changing the length of the drawbar of the first trailer is similar to changing the point of the coupling of the bus with the drawbar of first trailer. It is shown in the conclusions that the auto train № 2 (the first trailer with spaced axles and the front axle control, the second trailer is with approximate axles) is considerably better compared to the auto train № 3 (two trailers with approximated axles) and complies with the requirements of DIRECTIVE 2002/7 / EC . Thus, the overall length of the traffic lane in motion by circular trajectory of the auto train № 2 is 6,98 m, while the auto train № 3 is 7,43 m, which does not meet the requirements of DIRECTIVE 2002/7 / EC.
Authors and Affiliations
V. P. Sahno, V. M. Polyakov, S. M. Sharay, O. E. Omelnytsky
Keywords
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