This paper presents an investigation about the possibility to effectively control squeal noise under operating conditions by means of piezoelectric-actuators. One main feature of the present work is that the system has been tested successfully on a full scale test rig for complete wheel sets. The active system has been implemented in a train wheel-set and tested on a rolling wheel test stand at Lucchini Sidermeccanica S.p.A. (Lovere, Italy). The wheel set has been driven in normal operation made and also a set up of squealing has been realized. In both cases the axial acceleration on the wheel and the sound pressure in the near field have been measured simultaneously. The functionality of the active system has been investigated. The measurement results show a good functionality of the active system. The axial wheel acceleration is reduced by a factor of 2 - 8 in the squeal frequency. The corresponding airborne sound is reduced by 11 dB.
Active attenuation of squeal noise at train wheels
2009
4 Seiten, 6 Bilder, 15 Quellen
Aufsatz (Konferenz)
Englisch
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