МОДЕЛЬ ОЦЕНКИ УСТОЙЧИВОСТИ ДВИЖЕНИЯ АВТОТРАНСПОРТНОГО ПОЕЗДА И РЕЗУЛЬТАТЫ ЕЕ АНАЛИЗА

Abstract

Motor transport trains (MTT) – continue to be one of the main modes of transport in agriculture. However, their accident rate is quite high. Scientific studies of the process of movement of motor vehicles mainly provide for the improvement of their design characteristics and operating modes. The main way to reduce the accident rate of MTT is to limit the speed limit. There are ways to ensure the stability of the movement of MTT by changing the design of trailers. The purpose of the research is to analyze the mathematical model of the stability of the movement of the MTT to identify critical factors for its violation, optimize the design and operational parameters of the MTT, increase the predictability of the behavior of the MTT on the track (in the presence of lateral external influences: simulating sharp turns, displacement of cargo in the vehicle, etc.), formulating the main directions for improving its stability and manageability. We used the methods of analysis and synthesis, mathematical analysis, vector geometry. Lateral impact leads to an increase in the MTT momentum (lateral oscillations increase the speed), or to a violation of stability (movement amplitude beyond the track, overturning) of its movement. An increase in the momentum of the trailer reduces the overall stability of the MTT (the critical angle of displacement of the drawbar, at which the road train begins to “fold”, decreases by 9–56%). Increasing the momentum of the transport vehicle increases stability (the critical angle of displacement of the drawbar increases by 33–173%). The geometric dimensions of the drawbar and the trailer have little effect on the stability of the MTT. An increase in the length of the drawbar reduces stability (reduces the critical angle of its “folding”) by 5.5–14.7%. Increasing the length of the trailer increases stability: the critical angle of "folding" increases by 8–22%. Lateral displacement (“skidding”) of MTT elements on the track by more than 0.5–0.95 m will lead to its going beyond the boundaries of the safe transport corridor (driving out of the track), or increase the likelihood of a collision with oncoming vehicles