This paper concerns with the noise characterisation and limitation on a new electrical train that showed, during preliminary operational noise test, an excessive noise emission especially related to the electrical motor operation. In order to better understand the genesis of such a noise and to subsequently plan effective solutions to reduce the generated overall noise and vibration level it was firstly necessary to understand the vibro-acoustical behaviour of the motor itself, both in terms of eigenmodes and of forced response. In this paper the experimental modal analysis and the running modes analysis results of the electrical motor are presented and discussed with the aim to design adequate solutions to the problem. A modification of the motor has been proposed in terms of design changes whose experimental results will be discussed in the last part of the paper.

Acoustic characterisation and noise limitation strategies for a modern electrical train

VISCARDI, MASSIMO;LECCE, LEONARDO
2002

Abstract

This paper concerns with the noise characterisation and limitation on a new electrical train that showed, during preliminary operational noise test, an excessive noise emission especially related to the electrical motor operation. In order to better understand the genesis of such a noise and to subsequently plan effective solutions to reduce the generated overall noise and vibration level it was firstly necessary to understand the vibro-acoustical behaviour of the motor itself, both in terms of eigenmodes and of forced response. In this paper the experimental modal analysis and the running modes analysis results of the electrical motor are presented and discussed with the aim to design adequate solutions to the problem. A modification of the motor has been proposed in terms of design changes whose experimental results will be discussed in the last part of the paper.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/563247
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