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.
|Title of host publication||proceedings of Inter-Noise Conference 2002, 19-21 August 2002, Detroit, Michigan, USA|
|Place of Publication||Detroit MI, USA|
|Number of pages||6|
|Publication status||Published - 19 Aug 2002|
Tillema, H. G., & Wensing, J. A. (2002). Acoustic analysis of an induction motor with viscoelastic bearing supports. In A. Selamet (Ed.), proceedings of Inter-Noise Conference 2002, 19-21 August 2002, Detroit, Michigan, USA (pp. 1-6). Detroit MI, USA: INCE USA.