The damping of flexural vibration by introduction of a layer of low-density foam or powder into a structure is investigated. First, we report on experiments in which a layer of foam attached to an aluminum beam gives rise to significant damping at frequencies high enough to induce standing waves in the foam layer. Next, we provide a simple model for such vibration in which the foam is treated as a two-dimensional elastic continuum in which waves can propagate and find that the model is in good agreement with the experiments. Then the results of experiments in which aluminum beams are filled with a low-density powder are presented. The powder-filled beams exhibit behavior qualitatively like that of the foam-filled beams, but we find that the powder can be adequately modeled as an inviscid compressible fluid.
- Design Engineering Division and Computers and Information in Engineering Division
Damping of Flexural Vibration by Low-Density Foams and Granular Materials
- Views Icon Views
- Share Icon Share
- Search Site
Varanasi, KK, & Nayfeh, SA. "Damping of Flexural Vibration by Low-Density Foams and Granular Materials." Proceedings of the ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Chicago, Illinois, USA. September 2–6, 2003. pp. 1897-1905. ASME. https://doi.org/10.1115/DETC2003/VIB-48534
Download citation file: