Friction Forces at the Wheel's Contact with the Ground in a Turning Vehicle

Troyanovskaya, Irina; Ulanov, A.; Zhakov, A. O.; Voinash, Sergey

doi:10.24874/ti.2019.41.02.03

Cited by 10 publications

(1 citation statement)

References 18 publications

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“…where P is the resulting plow resistance force; β is the tilt angle of the resistance force to the longitudinal axis of the tractor; x k , y k are the coordinates of point K of applying the resulting resistance force of the plow relative to the tractor's center C of mass; R O is the resistance force of the landside plate; B is the tractor wheel track; P fi are the forces of resistance to the movement of the i caterpillar band (side); y i are the coordinates of the instantaneous center O of sliding of the contact area of the i caterpillar band (side); F xi , F yi , M i are the total force factors in the contact of each caterpillar band (side) with the ground [22].…”

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confidence: 99%

Directional stability of an agricultural tractor

Troyanovskaya¹,

Zhakov²,

Grebenshchikova³

et al. 2021

FME Transactions

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The discrepancy between the plow width and the tractor width leads to the asymmetry of plowing units. The geometry of the plowshare surface of the moldboard plow contributes to the generation of lateral forces on the working tool. All this leads to the imbalance of the tool and the deviation of the tractor from straight-line movement during plowing. To maintain straight-line movement, the driver has to adjust the machine every 5-10 meters, which is highly tiresome. To study the causes of lateral slips of the plowing unit, we constructed a mathematical model, which consists of the equations of controlled movement and equations of the tractor's uncontrolled shear under the action of external forces from the plow. The description of the force interaction of the drive with the ground is based on the mathematical theory of friction, taking into account anisotropy and elastic properties in contact. Based on the passive shear model, we constructed a hodograph diagram of the maximum tractor shear force from the side of the working tool. We found that the shear force reaches its maximum friction value only in the case of a translational shear, when its line of action passes through the tractor's center of gravity. In all other cases, the shift (slip) of the tractor is caused by a lower force. We formulated the features and assumptions of the model as applied to caterpillar and wheeled tractors. As a result, we found that, regardless of the direction of the lateral displacement of the plow's traction resistance, the tractor is slipped towards the plowed field. The result of the numerical experiment showed that the main reason for the slip of the wheeled plowing unit is the difference in soils along the sides of the tractor but not the deviation of the plow traction resistance.

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mentioning

confidence: 99%

Directional stability of an agricultural tractor

Troyanovskaya¹,

Zhakov²,

Grebenshchikova³

et al. 2021

FME Transactions

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Method for Calculating the Limiting Shear Force Deviating from a Given Direction of Movement Using the Example of the B12 Bulldozer

Zhakov

Troyanovskaya

Shepelev

2022

Proceedings of the 8th International Conference on Industrial Engineering

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Engineering of constructive parameters of vibroaspiration separator of oil-containing grain seeds

Rogovskii

Palamarchuk

Voinash

et al. 2020

J. Phys.: Conf. Ser.

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At designing of a vibroaspiration separator on the carried out researches, the working hypothesis, concerning increase in a driving force of process of fractionation at the expense of imposing in system of the combined unbalance from action of compulsive forces and torque which are resulted in system at realization of a self-oscillation mode of movement of the central pipe of the distributor has been offered. During theoretical and experimental studies was proved the possibility to improve the quality of separation by using the lower distribution zone of the vibroaspiration separator. Increasing the speed of seed particles under the influence of centrifugal forces, Coriolis acceleration and self-oscillating motion in the process of seed separation can increase the value of trajectory changes by 25-30 %, and thus improve the quality of seed separation by 10-15 %. The results of experimental studies of created vibroaspiration separator of sunflower seeds allowed to substantiate the following rational parameters of this process: the diameter of the distributor hopper must be within 50-60 mm; the diameter of the branch pipe, that supplies seed into the vertical aspiration channel is 30-40 mm at useful channel length of 0.8 m; air flow speed, for the best separation of sunflower seeds is 75-90 % of the critical air flow rate and is 4.5-5.5 m/s. To achieve effective inertial forces and to ensure the clarity of the separation of fractions in the conditions of self-oscillating mode of movement of the central pipe of the distributor, it is rational to mount 20 sailing elements.

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Friction Forces at the Wheel's Contact with the Ground in a Turning Vehicle

Cited by 10 publications

References 18 publications

Directional stability of an agricultural tractor

Directional stability of an agricultural tractor

Method for Calculating the Limiting Shear Force Deviating from a Given Direction of Movement Using the Example of the B12 Bulldozer

Engineering of constructive parameters of vibroaspiration separator of oil-containing grain seeds

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