Efficient evaluation of sound radiation of an electric motor using model order reduction

Martin Eser, Caglar Gürbüz, Lennart Moheit, Marold Moosrainer, Steffen Marburg

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Electric motors can suffer from severe noise radiation when the internal electromagnetic forces excite a natural vibration mode of the stator pack. These critical operation points can be identified from a Campbell diagram. The generation of the diagram based on numerical analyses is computationally very costly, in particular when the motor is to be analyzed in the mid-frequency range. The complex vibration behavior of the motor housing prohibits a straight-forward application of common model reduction processes. Therefore, a new multiple-input-multiple-output model reduction process is developed using the moment matching method based on Krylov subspaces. The in-vacou surface velocity modes of the motor housing yield as input load patterns. A structure-preserving second-order Arnoldi algorithm is used for the calculation of the Krylov subspaces. The proposed process enables the direct evaluation of the radiated sound power for all considered frequency points within a frequency band. The reduction process incorporates an adaptive selection of structural modes in order to allow for an efficient evaluation of the radiated sound power of the electric motor.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages5473-5480
Number of pages8
ISBN (Electronic)9783939296157
DOIs
StatePublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 9 Sep 201923 Sep 2019

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Country/TerritoryGermany
CityAachen
Period9/09/1923/09/19

Keywords

  • Electric motor
  • Krylov subspace
  • Model order reduction
  • Sound radiation

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