Acoustic analysis of an induction motor with viscoelastic bearing supports

H.G. Tillema, J.A. Wensing

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    The demand for silent bearing applications has resulted in the development of an effective damping layer between the outer ring of a rolling bearing and the surrounding structure. By means of numerical modeling using both FEM and BEM techniques an induction motor for household appliances is analyzed. A hybrid modeling approach combining measured structural velocities with a BEM formulation is used to validate the acoustic model. The numerical results are compared with results obtained from sound intensity measurements estimating the radiated sound power level for a running electric mo tor. It is found that a relatively simple boundary element model is capable of predicting the radiated sound power in a wide frequency range. By using BEM in combination with the radiation modes formulation it is found that a properly designed viscoelastic layer in the vicinity of the bearing is theoretically capable of reducing a fair amount of sound emitted by the motor.
    Original languageUndefined
    Title of host publicationproceedings of Inter-Noise Conference 2002, 19-21 August 2002, Detroit, Michigan, USA
    EditorsAhmet Selamet
    Place of PublicationDetroit MI, USA
    PublisherINCE USA
    Number of pages6
    ISBN (Print)CD-rom
    Publication statusPublished - 19 Aug 2002
    Event31st International Conference on Noise Control Engineering, Inter-Noise - Dearborn, USA
    Duration: 19 Aug 200221 Aug 2002


    Conference31st International Conference on Noise Control Engineering, Inter-Noise
    OtherAugust 19-21, 2002


    • IR-58831
    • METIS-210721

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