Research of a Truck Train Movement when Driving Semitrailer by Slowdowning of Wheels of One Axis Pin on the Model

It has been shown that a perspective type of passenger transport is a metro bus, which can be both two-and three-link. Mathematical model of an autotrain has been developed for a two-link metrobus with both an uncontrolled and a controlled trailer, with the help of which it is established that the speed of the metro bus is 10 m/s, the angular speed of links racking, lateral acceleration, the angles of axle wheels' diversion while manoeuvring of "steering wheel jerk" "Shift" and "turn" have a fading nature of oscillation, which ensures the stability of its motion. At the same time, the value of lateral accelerations in the center of masses of metrobus separate links with an uncontrolled trailer at a speed of 15 m/s, while performing various manoeuvres do not exceed 0.45 g, according to this characteristics, such metrobus is stable, instead of a metrobus with a controlled trailer, which at this speed loses its stability. This should be considered when developing the advanced two-link metrobus of increased overall length (24 m).

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“…were also considered, namely the 90-degree rotation, S-shaped rotation, ISO manoeuvre, straight-line motion [25].…”

Section: Grants and Fundingmentioning

confidence: 99%

Stability of the Two-Link Metrobus

Sakhno¹,

Poliakov²,

Murovanyi³

et al. 2023

Communications

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“…Besides, experimental studies require significant material and time resources. A similar drawback is characteristic of the numerical simulation of mathematical models of the dynamic process of motion of a wheeled vehicle as a mechanical system of sprung -unsprung part [5,6].…”

Section: Research Statementmentioning

confidence: 99%

The influence of degree of loading and load placing on steerability of vehicles

Kuzio¹,

Сокіл²

2021

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The methodology of research of the influence of the degree of loading, kinematic parameters of movement, and nonlinear power characteristics of elastic elements and shock-absorbers of the suspension system on their steerability on curved sections of the road is developed. The research is based on the equation of kinetostatics of the system of sprung-unsprung part and differential equations that relate the motion of the sprung part of vehicles. Concerning the last, they take into account both loading of a vehicle and nonlinear-elastic characteristics of shock-absorbers. For the case when elastic characteristics of shock-absorbers are described by degree or close to it dependence, the fluctuation of sprung part is described analytically. Their peculiarity is that the frequency and therefore dynamic force of wheels pressure on the bearing surface (road) depends on the amplitude. It is the last value and characteristics of the road surface that determine the main parameters of steerability and stability of the movement of wheeled vehicles along curved sections of the road. Taken together, the mentioned above allowed to obtain the dependence of the critical value of the dynamic angle of rotation of the steered wheels, as a function of the amplitude of longitudinal-angular oscillations, kinematic motion parameters, and the level of loading of a vehicle. It is established: - fluctuation of the sprung part significantly reduce the value of the limiting angle of rotation of the steered wheels along the curved sections of the road; - for the period of acceleration of the vehicle and the closer location of the center of gravity of the cargo transported to the tailgate, the limit value of the dynamic angle of rotation of the steered wheels is less; - the suspension system with the progressive law of change of regenerative force of elastic shock-absorbers in a wider range of change fluctuations amplitude of the suspended part satisfies ergonomic conditions of transportation. The obtained calculated dependencies can simultaneously be basic during the modernization of existing or the creation of new suspension systems in order to improve the main operation characteristics of wheeled vehicles

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Research of a Truck Train Movement when Driving Semitrailer by Slowdowning of Wheels of One Axis Pin on the Model

Cited by 2 publications

References 3 publications

Stability of the Two-Link Metrobus

Stability of the Two-Link Metrobus

The influence of degree of loading and load placing on steerability of vehicles

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