Abstract
Problem. For an hour, in the scientific-methodical recommendations of the ship-experts, it is installed in the scientific-technical literature of the day-to-day parameters of galvanizing of vantage, bug-capable transport equipment, so that it is inaccurate to introduce autotransport equipment for the eastern part to inaccurate zasob_v unique road transport suit. Goal. The value of the function of galvanizing large transport bridges on the basis of the coordinates of the position to the center of the heavy transport, realizable values, which are realized between the tires and the supporting surface, as well as the support for the rear axle of the transport bridges. Methodology. The approaches adopted in the work to solve this goal are based on the theoretical foundations of braking multi-axle vehicles, the scientific provisions of elastic deformations of pneumatic tires of automobile wheels, geometric and weight parameters of a wheeled vehicle. Results. The equations that allow to calculate the value of the braking coefficient of multi-axle vehicles based on the coordinates of the position of the center of gravity, the realized couplings between the tires and the bearing surface, as well as the load distribution between the respective front and rear axles of the vehicle. Rivnyannya is assigned, which allow the positioning of the coordinates to the center of the car of a multi-axle wheeled transport vehicle for both front and rear axles. The calculation schemes of the position of the coordinates of the center of mass for two-axle, three-axle and four-axle with different axle layout are presented in graphical form, which give a general idea of the mass distribution between the front and rear axles of the vehicle. Originality. Presented in a graphical view of the layout of the positioning of the coordinates to the center of the car for a two-axle, three-axle and one axle with a small layout of the bridges, which give a far-reaching display of the space between the front and rear axles of the transport vehicle. Practical value. The results can be recommended by the experts-auto technicians in the development of technical capabilities for the drivers of vantage transport means, uniqueness of the road-transport usability.
Highlights
The fundamental basis of active safety of the vehicle is its braking properties, and the nature of braking depends on the interaction of the tires of its wheels with the road surface and the coordinates of the center of gravity of the vehicle.The interaction of a vehicle tire with the road surface in the theory of wheeled vehicles is characterized by adhesion utilization, which is realized in the longitudinal and transverse directions relative to the plane of rotation of the vehicle wheel during tire deformation during its interaction with the road surface
Vehicle deceleration is not a constant value, as it depends on many factors, and the analysis of theoretical studies [8, 15, 16, 19] to determine the magnitude of deceleration of wheeled vehicles, showed that the deceleration of the vehicle depends on the value of adhesion utilization [3 - 7, 9 - 14, 18], which is realized between the tire and the road surface, the coordinates of the center of gravity of the vehicle relative to its axles [20], as well as the position of the axles relative to each other
In the braking due to tire sliding less than 100% the inequality z fi fтр is almost always fulfilled, the braking rate of vehicle (z) is determined by the adhesion utilization of the respective axles of the vehicle and the geometric location of its center of gravity in the vertical plane relative to the road surface
Summary
The fundamental basis of active safety of the vehicle is its braking properties, and the nature of braking depends on the interaction of the tires of its wheels with the road surface and the coordinates of the center of gravity of the vehicle. In the braking due to tire sliding less than 100% the inequality z fi fтр is almost always fulfilled, the braking rate of vehicle (z) is determined by the adhesion utilization ( fi ) of the respective axles of the vehicle and the geometric location of its center of gravity in the vertical plane relative to the road surface. – respectively the coordinates of the location of the center of gravity of the wheeled vehicle relative to the conditional front and conditional rear axle of the vehicle, m;. Longitudinal coordinate y4'_ axles i the location of the axes of the four-axis vehicle, relative to the coordinates of its center of gravity (Fig. 4), can be determined using the equation:. *the radius of the wheels of the second axle is less than the radius of the wheels of the third axle
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