ESDU 91013:2011

$62.40

Methods for Improving Damping – Part 2: Layered Damping Treatment for Structures: Analysis and Examples

Published By	Publication Date	Number of Pages
ESDU	2011-08	44

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Category: ESDU

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Description

ESDU 91013 introduces computer programs to estimate the resonant
frequencies and loss factors in any mode for beam or plate
structures with damping treatment applied. ESDUpac A9113 deals with
free-layer treatment applied over the whole of one or both sides of
a structure with any combination of simply-supported, clamped or
free edges. The method of analysis and assumptions made in the
theory are described in ESDU 91012. ESDUpac B9113 deals with
constrained-layer treatment over the whole of one side of a
structure that vibrates in modes that have a sinusoidal
displacement form which implies the edge condition for a plate must
be simply-supported and a beam must have pinned ends; single or
multiple layers of different materials can be used. ESDUpac C9113
deals with a single constraining layer applied to a beam and does
not require the condition of a sinusoidal displacement so it
applies to any combination of clamped, pinned and free end
supports, except pinned-free. Both constrained-layer programs
assume that all damping occurs in the damping layer. The input to
and output from the programs are explained and illustrated with
worked examples.