Dynamic Response of Structures with Viscoelastic Cover
Andrea Mura, Politecnico di Torino
Viscoelastic materials are utilized for reducing vibrations
of machines and their components; they find application in
many industrial activities: automotive, aerospace, electro
domestics, buildings and many others. These materials are
cheap, easy to put on application and can add damping without
modifying both inertial and stiffness properties of the structure
on which they are applied.
In this work the frequency response function
(FRF) of a cantilever beam covered with one
layer of viscoelastic material (Free Layer Damping treatment)
has been investigated.
Few FEM models of the structure have been developed
with Altair Hyperworks, changing both type of element and
its properties,
in order to find the best model to simulate
that kind of structures.
The results of the FEM analysis have
been compared,
in terms of amplitude and frequency, to an
analytical model, and to a numerical one
in which an hybrid element has been
utilized.
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