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2009
Conference Paper
Titel
Modelling and simulation of acoustic absorption of open cell metal foams
Alternative
Modellierung und Simulation der akustischen Absorption von Metallschäumen mit offener Struktur
Abstract
We analyse the microstructure of an open nickel-chrome foam using computed tomography. The foam sample is modelled by a random Laguerre tessellation, i.e. a weighted Voronoi tessellation, which is fitted to the original structure by means of geometric characteristics estimated from the CT image. Using the Allard-Johnson model we simulate the acoustic absorption of the real foam and the model. Finally, simulations in models with a larger variation of the cell sizes yield first results for the dependence of acoustic properties on the geometric structure of open cell foams.