RESEARCH PAPER
Specification of estimation of a passenger car ride smoothness under various exploitation conditions
1
Vilnius Gediminas Technical University, Faculty of Transport Engineering, Saulėtekio al. 11, LT-10223 Vilnius, Lithuania
Publication date: 2021-12-31
Eksploatacja i Niezawodność – Maintenance and Reliability 2021;23(4):719–725
HIGHLIGHTS
- Sperling's comfort index dependence on the stiffness of passenger car suspension.
- Wheel flat impact on rail vehicle running gear vibration character.
- Guidance & stability of running gear with independently rotating wheels.
- Processing of the carbody acceleration amplitudes by Fourier transform method.
KEYWORDS
railway transportpassenger carrunning gearindependently rotating wheelsSperling'scomfort indexdivergencesnumerical simulationsoftware package UM
ABSTRACT
The stability and smoothness of rolling stock running could be defined accurately by universal Sperling's comfort index. The divergences of variation of Sperling's comfort index of a passenger car under specific operating conditions of running gear are examining in this paper. Numerical simulations of a passenger car running with independently rotating wheels under various conditions have been performing. Gained results showed that divergences of the Sperling's comfort index variation are particularly significant due to running gear component oscillations in the horizontal plane (lateral direction). A field experiment of a passenger car with a solid (traditional) wheelset with a flat running surface proved this hypothesis. The obtained results of this experiment confirmed this assumption. Therefore, the study of the regularities of lateral oscillations of a passenger car is the logical direction of further research.
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