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Predicted and measured plate velocities induced by turbulent boundary layers
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0002-9632-8398
2012 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 331, no 24, 5309-5325 p.Article in journal (Refereed) Published
Abstract [en]

A method for the prediction of velocity levels of a fuselage plate excited by turbulent boundary layers is described. The aim is to identify a method for the prediction of the relative changes of the velocity levels caused by variations of plate geometry and flight conditions. The Corcos, Efimtsov and Chase models are used to characterize the dynamic surface pressure cross-spectra. Predicted results using these models are compared with the result of in-flight measurements of plate velocities. It is found that the Corcos model gives the best agreement with the measured results for three different flight conditions. The Efimtsov extension and Chase models tend to underestimate the plate response in the lower frequency range. It is evident that the velocity level of the plate elements of the fuselage very much depends on the speed of the aircraft. An increase of the speed of the aircraft by 10% is likely to increase the plate velocity level by 3 dB and a reduction of the speed by 10% would give a reduction of 3 dB.

Place, publisher, year, edition, pages
2012. Vol. 331, no 24, 5309-5325 p.
Keyword [en]
Chase model, Corcos model, Cross spectra, Dynamic surface pressure, Flight conditions, Lower frequencies, Measured results, Plate elements, Plate geometry, Plate velocity, Turbulent boundary layers, Aircraft, Fuselages, Velocity
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-103510DOI: 10.1016/j.jsv.2012.07.012ISI: 000308680700009ScopusID: 2-s2.0-84865346101OAI: diva2:561064
TrenOp, Transport Research Environment with Novel Perspectives

QC 20121017

Available from: 2012-10-17 Created: 2012-10-15 Last updated: 2013-04-10Bibliographically approved

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Feng, Leping
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