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  5. Dynamics of sprung of wheeled lightly armored machines and firing effectiveness of mounted small arms

Dynamics of sprung of wheeled lightly armored machines and firing effectiveness of mounted small arms

M. Sokil, R. Nanivskyi, N. Huzyk, O. Yemelyanov
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Description: The paper contains study related to effect of the velocity of light -armored vehicles and the main parameters describing the nonlinear power characteristic of their sprung system on the vertical vibrations of the sprung, and hence the effect of carosse-rie’s oscillations on the accuracy of firing from the mounted armament. Having analyzed the sprung system of the wheeled ar-mored vehicles, it can be noted that improving the power characteristics of the sprung system, increasing the stability of its movement and reducing the negative impact of vibrations on the vehicle's crew as well as firing on move are urgent tasks to explore. Suspension properties of the wheeled, light-armored vehicles influence the firing accuracy, crew protection and equip-ment in case of excessive overload while crossing rough terrain or road inequalities . Its parameters are chosen according to permissible oscillation mode of the sprung and the wheels that emerges while moving across the rough terrain. For sprung sys-tems with linear or related to it changes in the regeneration power, the characteristics of the suspension do not provide adequate protection against significant dynamic overloads, but also leads to a significant fatigue of the crew during long journeys in con-ditions of the movement across rough terrain. As the experimental and theoretical studies of the installation of wheeled light-armored machines of sprung systems with progressive or regressive power characteristics of the elastic elements show a qualita-tively new characteristics of the sprung vibrations. In the paper it is shown that the period of oscillations, therefore, the fre-quency of the proper oscillations depends on the amplitude. The higher amplitude, the higher eigenfrequency is in the case of a progressive law of change in the regenerative force, however, conversely, – less, for the case of a regressive law of change in the regeneration of shock absorbers. Thus, the most favorable is the suspension system with a regressive law of the change in the regenerative force and the significant values of the static deformation of the elastic elements, and vice versa, at small amplitudes of the sprung vibrations- a suspension with a progressive law of the change in the regeneration force for a relatively small amount of static deformation of the elastic elements. Regarding the firing from lightly armored vehicle with additional weapons in the east, its efficiency is better while employing the system of sprung with regressive strength characteristics.


Keywords: sprung system, wheeled lightly armored vehicle, amplitude, frequency of oscillation

References

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Reference:
 Sokil, M.B., Nanivskyi, R.A., Huzyk, N.M. and Yemelianov, O.V. (2018), “Dynamika pidresorenoi chastyny kolisnykh lehkobronovanykh mashyn ta efektyvnist vedennia vohniu iz vstanovlenoi na nei striletskoi zbroi” [Dynamics of sprung of wheeled lightly armored machines and firing effectiveness of mounted small arms], Scientific Works of Kharkiv National Air Force University, Vol. 4(58), pp. 94-100. https://doi.org/10.30748/zhups.2018.58.13.