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Subject Flexible sheets and tuned panels
Date
Tue Mar 29 2005 11:32
Author Tor Erik Vigran
(vigran@iet.ntnu.no)
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Could you please give some further specification on the kind of plastic sheets you are concerned with, i.e. material, thickness etc. In any case, there is no possibility to introduce tension in any of the layers but in many cases designing tuned absorbers the mass of the layer is the dominating property. We have e.g. successfully modelled fibreboards backed by porous layers using the “limp mass” layer adjusting the resistance component by comparison to one measurement result. I believe this procedure is the only way to simulate the unknown resistance component due to the inherent damping of the sheets, friction along the edges, by the fastening arrangement etc.
Needless to say, I shall be most interested in any results you may have.
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