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Titel:

Contact-Free Vibration Measurements with Particle Velocity Probes

Autor(en): D. Sadra
Zusammenfassung: To identify mode shapes of vibration structures, it is necessary to perform vibration measurements using structural sensors (such as accelerometers) attached to the vibrating structure. As a consequence, the structural response is modified due to the adding of extra masses. To avoid this effect, especially during the test of lightweight structures, it can be advantageous to replace vibration measurements by acoustic measurements. For this purpose, it is possible to use particle velocity (pu) probes in the very near field of the vibrating structure. To describe the theoretical approach, a simplified vibro-acoustic model for a one dimensional sound tube has been analyzed [1]. To be independent of a signal measured with sensors that are directly mounted on the structure, a coherence based measurement approach has been analyzed as the measurement error calculated.
Veranstaltung: Deutscher Luft- und Raumfahrtkongress 2014, Augsburg
Verlag, Ort: Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2015
Medientyp: Conference Paper
Sprache: englisch
Format: 21,0 x 29,7 cm, 4 Seiten
URN: urn:nbn:de:101:1-2015021323482
Stichworte zum Inhalt: akustische Messtechnik, schallschnelle Sonden
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Veröffentlicht am: 13.02.2015