Determination of Dynamic Characteristics and Features of Operation of Pneumatic Springs of High-Speed Railway Rolling Stock, while Changing the Pressure Gauge in the Spring

The object of research is the pneumatic spring of the pneumatic spring suspension system for high-speed railway rolling stock. A methodology for experimental tests and theoretical studies of a pneumatic spring has been developed to determine the characteristics of the spring, taking into account changes in the pressure gauge in the spring. Static experimental tests of the pneumatic spring were carried out in the normal mode of its operation, that is, without including the emergency spring in operation. As a result, the "force-strain" dependences are obtained, taking into account the value of the manometric pressure in the pneumatic spring. It is established that the laws of deformation of the pneumatic spring of high-speed rolling stock are influenced by the value of the manometric pressure in the spring. In the pressure change range from 0.5 to 2.0 atm. the maximum value of the applied force for spring deformation on a steel fork decreases with increasing pressure gauge. At the same time, on the deformation curves when the pressure increases by 0.5 atm. there is a zone of sharp changes in the force value with simultaneous slight deformation of the spring in the vertical plane. Further increase in the pressure gauge from 2.5 to 4.5 atm. leads to smooth operation of the spring in the "force-strain"ratio.