DocumentCode :
2658065
Title :
Investigation of surface velocity pattern of power transformers tanks
Author :
Hackl, Alexander ; Hamberger, Peter
Author_Institution :
Siemens Transformers Austria GmbH & Co KG Werk Linz, Linz, Austria
fYear :
2010
fDate :
6-8 Sept. 2010
Firstpage :
1
Lastpage :
3
Abstract :
It is common knowledge, that the surface velocity pattern of power transformers tanks and therefore the sound pressure level (SPL) are very sensitive to environmental influences, for example a temperature rise or a simple displacement, so a precalculation of the surface velocity and the SPL seem not to be feasible. By means of an experimental tank it is demonstrated, that the surface velocity pattern can be broken down into a linear combination of resonant modes near the excitation frequency. The magnitude and phase between the resonant modes are influenced by the environmental changes, but the shapes of the involved resonant modes are widely independent of the environmental influence. Therefore the resonant modes can be predicted with numerical simulation.
Keywords :
acoustic wave velocity; numerical analysis; power transformers; experimental tank; numerical simulation; power transformers tanks; sound pressure level; surface velocity pattern; Computational modeling; Noise; Numerical simulation; Power transformers; Resonant frequency; Shape; Vibrations; Low Noise Power Transformers; Sound Pressure Level; Surface Velocity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Machines (ICEM), 2010 XIX International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4174-7
Electronic_ISBN :
978-1-4244-4175-4
Type :
conf
DOI :
10.1109/ICELMACH.2010.5608461
Filename :
5608461
Link To Document :
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