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Combined Experimental and Analytical Vibro-Acoustic Model of an Electrical Motor
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- Botling, Fredrik (author)
- KTH,MWL Marcus Wallenberg Laboratoriet
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- Lopez Arteaga, Ines (author)
- KTH,MWL Marcus Wallenberg Laboratoriet
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- Leth, Siv (author)
- KTH,MWL Marcus Wallenberg Laboratoriet
- (creator_code:org_t)
- 2016
- English.
- Other publication (other academic/artistic)
Abstract
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- A vibro-acoustic modal model of a traction motor forrailway applications is presented based on an experimentalmodal analysis of the system. Noise requirements forrailway traction motors are getting more and moredemanding as part of the overall levels of new rolling stock.It is therefore of great interest to understand and predict thevibro-acoustic behaviour of electromagnetic noisegenerated by traction motors. The modal parameters arederived from an experimental modal analysis. The primarysource for the radiated sound of the tested traction motor isthe radial deflections of the stator shield. The modalparameters for the radial deflections are implemented in areduced order modal model in a state space format usingMatlab/Simulink. Only the structural modes that have amatch in both the frequency and the spatial domain withthe electromagnetic excitation force will cause animportant vibro-acoustic response. This makes it possibleto create an accurate and efficient reduced order modalmodel with only a fraction of the total number of structuralmodes. The simulation results from the modal model arecompared to measured levels of vibration and acousticmeasurements of the motor.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Publication and Content Type
- vet (subject category)
- ovr (subject category)
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- Royal Institute of Technology
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