To the Comparative Assessment of Vehicles for Passenger Transport in the BRT System

Abstract

Analysis of the issues of stability and dynamics of wheeled vehicles moving along a special overpass indicates an extremely limited information resource. The vast majority of works are devoted to issues of vertical dynamics, but the issue of transverse dynamics and transverse force interaction of the guide module with the overpass is insufficiently covered. Also, the question of the use of one or another model of tire retraction when modeling the movement of an elastic wheel and practical recommendations for choosing the size of the bearing and guide wheels depending on the nature and magnitude of the dynamic loads providing the necessary level of safety and comfort remain little covered. Further research will be devoted to resolving these issues. Keywords: metrobus, motion equations, maneuverability, stability, layout, trailer, semi-trailer, BRT system.

The Stability Indicators of the Section Articulated Buses

“…The obtained system of equations allows to study the behavior of a three-section articulated bus in both stationary and non-stationary mode motions, as well as to determine the critical speed v cr of the bus, which has two approaches to its quantitative estimation [16]: the first is associated with the study of characteristic equations (the 1st Lyapunov's method) or Lyapunov's functions (the 2nd Lyapunov's method), the second -with the output of the motion parameters for the allowable range. The critical speed v cr , as a stability criterion, connects the design and operational parameters of the multi-section articulated bus and its speed and allows you to find its maximum value, exceeding which leads to the loss of the motion stability.…”

“…rectilinear modes, but the circular modes, as well, then for the realizability of such a motion it is necessary to fulfill the condition R > 0. The turning radius / R o = in the theory of wheeled vehicles is usually called the curvature radius of the trajectory point of the longitudinal axis of the driving link, the speed of which is directed along the axis [16]. For the radius R one has:…”