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Prediction and control of sound transmission through honeycomb sandwich panels for aircraft fuselage and train floors
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.
2010 (English)In: 17th International Congress on Sound and Vibration 2010, ICSV 2010: Volume 1, 2010, 117-124 p.Conference paper (Refereed)
Abstract [en]

Composite sandwich structures with honeycomb cores are increasingly considered as an alternative to aluminium for aircraft fuselages. Technical benefits include lower density, higher strength and greater fatigue resistance. The ability of composite materials to inexpensively be formed into complex shapes allows part count reductions and substantial cost savings. For railway carbodies, metal honeycomb sandwich panels are common in door panels and for interior floors. For floors the drivers are low weight, good moisture properties, fire resistance combined with high stiffness. Despite these advantages, sandwich structures may exhibit increased sound transmission compared to homogenous structures. Appropriate choice of core materials will reduce the need for subsequent noise control measures. In this paper it is shown how a physical understanding for the wave transmission phenomena together with modern prediction software, can be used to achieve designs that satisfy both acoustical and structural requirements. Calculated wavenumbers and transmission losses are compared to measurements for composite sandwich panels with honeycomb cores, treated and un-treated with damping layers. Modeling concepts as well as the potential for insertion losses due to added damping are discussed.

Place, publisher, year, edition, pages
2010. 117-124 p.
Keyword [en]
Added damping, Complex shapes, Composite sandwich panels, Composite sandwich structure, Control measures, Core material, Cost saving, Damping layers, Door panels, High stiffness, Homogenous structure, Honeycomb core, Honeycomb sandwich panels, Lower density, Modeling concepts, Moisture properties, Prediction and control, Sound transmission, Structural requirements, Transmission loss, Wave numbers, Acoustic wave transmission, Aircraft control, Aluminum, Architectural acoustics, Coremaking, Fire resistance, Floors, Fuselages, Sandwich structures, Honeycomb structures
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-148928ScopusID: 2-s2.0-84871417693ISBN: 978-161782255-1OAI: diva2:738148
17th International Congress on Sound and Vibration 2010, ICSV 2010, 18 July 2010 through 22 July 2010, Cairo, Egypt

QC 20140815

Available from: 2014-08-15 Created: 2014-08-14 Last updated: 2014-08-15Bibliographically approved

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Ramanathan, Sathish Kumar
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