Abstract :
The wheel with a pneumatic tire of traditional design has a significant drawback, which is to stop the movement of the vehicle with the loss of excess air pressure. The loss of excess air pressure in the pneumatic tire when driving a car at high speed can lead to a traffic accident with serious consequences. One of the technical solutions aimed at preserving wheel working ability and improving vehicle safety in case of loss of overpressure of air in a pneumatic tire is the use of internal additional supports. However, the loss of excess air pressure even in one pneumatic tire leads to a noticeable deterioration in most of the performance properties, especially when driving on roads with uneven surfaces. Intensive oscillations lead to an increase in the vibration level, reducing the performance of high-speed properties, fuel efficiency, stability and controllability of the wheeled vehicle. A new mathematical model of the springing system has been developed, which is equivalent to a vehicle suspension with high-safety wheels and allows one to substantiate the parameters of the internal additional supports and evaluate their influence on the vibrations and smooth running of the vehicle at the design stage. The model is intended for engineering calculations and differs in that internal additional supports are presented as spring-damping elements of the vehicle springing system. The results of study can be claimed by manufacturers of civil and military vehicles, wheeled armored vehicles and special machines.
Keyword :
high-safe wheels, springing system, smooth running, mathematical model, vibration, vertical acceleration, amplitude-frequency characteristic.