World Experience in Creating Mathematical Models of Air Springs: Advantages and Disadvantages

Purpose. Taking into account the production and commissioning of modern high-speed rolling stock, authors are aimed to analyze currently created mathematical models describing dynamic behavior air spring, systematize them consider advantages disadvantages each model type. Methodology. For analysis, a comparative chronological method was used, which makes it possible trace development several points view, concepts, theories. In accordance with adopted decision equations, existing springs were divided three groups: mechanical, thermodynamic finite-elements. When analyzing models, influence number parameters on such as disturbing force frequency, heat transfer, nonlinear characteristics materials, shape membrane, etc., considered. Findings. A feature mechanical is determination input based analysis experimental results, requires access complex measuring equipment must be performed for new an spring separately. Unlike allow taking damping effect in horizontal vertical direction, mainly focused studying direction. The use finite element most accurately reproduce however, significant expenditures time effort create perform calculations. Originality. Mathematical systematized, importance their study conjunction spatial stock emphasized. Practical value. shows ways further improvement, indicates possibility tasks set. It will allow, even at design stage evaluate its characteristic traffic safety indicators when interacting railway track.