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ACOUSTIC POSTPROCESSING FOR MULTIBODY SIMULATIONS INCLUDING FLEXIBLE BODIES

Carrarini, Antonio (2009) ACOUSTIC POSTPROCESSING FOR MULTIBODY SIMULATIONS INCLUDING FLEXIBLE BODIES. Multibody Dynamics, ECCOMAS, 29. Jun. - 2. Juli 2009, Warschau, Polen.

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Kurzfassung

In this paper an acoustic postprocessor for multibody simulations is presented. The tool computes the sound power on the surface of a generic vibrating flexible body. The radiated sound power is not computed because this would require the knowledge of the radiation efficiency. Such parameter can be determined by an ulterior analysis including the fluid/structure interface, to be performed by an appropriate Finite Element or Boundary Element analysis. The sound power computed by the presented tool can be directly used for the relative acoustic assessment of mechanical parts with respect to design variations or modified boundary conditions. Moreover, the computed sound power directly leads to an estimate of the radiated power – and thus eventually of the noise level – if the radiation efficiency can be deduced from experience or empiric formulas, which is the case of most engineering problems. As an application example, the acoustic behavior of a railway wheelset is studied. The wheelset is modeled as a flexible body and integrated in the multibody model of a complete vehicle. Two operative cases have been considered: first, the vehicle driving through a switch, with the resulting impulsive noise due to the wheel rolling over the rail gap in the middle of the switch (“frog”); secondly, the rolling noise due to wheel and rail roughness – a dramatic problem especially for freight vehicles.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:ACOUSTIC POSTPROCESSING FOR MULTIBODY SIMULATIONS INCLUDING FLEXIBLE BODIES
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Carrarini, AntonioAntonio.Carrarini@DLR.de
Datum:2009
Referierte Publikation:Ja
In ISI Web of Science:Nein
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Arczewski, KNICHT SPEZIFIZIERT
Fraczek, JNICHT SPEZIFIZIERT
Wojtyra, MNICHT SPEZIFIZIERT
Status:veröffentlicht
Stichwörter:Multibody simulation, flexible bodies, acoustics, structure borne sound, modal analysis, railway rolling noise
Veranstaltungstitel:Multibody Dynamics, ECCOMAS
Veranstaltungsort:Warschau, Polen
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:29. Jun. - 2. Juli 2009
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - Next Generation Train (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Robotik und Mechatronik > Systemdynamik und Regelungstechnik (war Entwurfsorientierte Regelungstechnik)
Hinterlegt von: Monika Klauer
Hinterlegt am:14 Jan 2010 15:23
Letzte Änderung:12 Dez 2013 20:52

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