ABSTRACT: Vibrations resulting from powertrain work and auxiliary equipment reduce the comfort, reliability, and durability of the vehicles. The vibration levels transmitted to the passenger compartment and the emitted structural noise depend mainly on the efficiency of their vibration isolation with respect to the vehicle body. The work presents an experimental determination of the vibration levels generated by the operating cycle of a machine unit “electric motor – piston compressor”. Such types of aggregates are mounted on electric modular trains. In the operation of the aggregates, increased levels of transmitted vibrations to the wagon passenger lobbies were found. Special vibration measuring equipment was used to conduct the experiments. The results obtained are presented in the form of vibration diagrams.
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