Modeling and characterisation of the vibration dynamics modeling of anisotropic porous foam materials
2006 (English)In: Proceedings of ISMA2006: International Conference on Noise and Vibration Engineering, Vols 1-8 / [ed] Sas, P; DeMunck, M, 2006, 1481-1487 p.Conference paper (Refereed)
Accurate prediction of low to medium frequency surface vibration and sound radiation behavior of foam materials, requires improved means of estimating the dynamic elastic and damping properties of the foam. This need arises due to the geometric anisotropy in the foam cell microstructure, where the foam cells and struts are elongated in the rise and injection flow directions of the manufacturing process. To reach acceptable levels of accuracy, this inherent anisotropy needs to be correctly represented in the acoustical numerical simulation methodology. The present paper presents a methodology built on a hybrid combination of experimental deformation and strain field mapping, and physically based porous material acoustic Finite Element (FE) simulation modeling, allowing for the amsotropic dynamic elastic coefficients and damping properties of the foam to be correctly estimated. This new methodology of model-based porous material characterization is demonstrated here for a simplified seismic mass configuration.
Place, publisher, year, edition, pages
2006. 1481-1487 p.
IdentifiersURN: urn:nbn:se:kth:diva-42222ISI: 000246669502025ISBN: 978-90-73802-83-4OAI: oai:DiVA.org:kth-42222DiVA: diva2:446798
International Conference on Noise and Vibration Engineering (ISMA2006) Location: Louvain, BELGIUM Date: SEP 18-20, 2006
QC 201110102011-10-102011-10-062011-10-10Bibliographically approved