Optimization of the impact multi-mass
vibration absorbers. The problem
of attaching dynamic vibration absorber
(DVA) to a discrete multi-degree-of-freedom
or continuous structure has been outlined in
many papers and monographs. An impact
damping system can overcome some limitations
by impact as the damping medium
and impact mass interaction as the damping
mechanism. The paper contemplates the provision
of DVA with the several of the impact
masses. Such originally designed absorbers
reduce vibration selectively in maximum vibration
mode without introducing vibration in other modes.
An impact damper is a passive
control device which takes the form of
a freely moving mass, constrained by stops
attached to the structure under control, i.e.
the primary structure. The damping results
from the exchange of momentum during impacts
between the mass and the stops as the
structure vibrates. The paper contemplates
the provision of the impact multi-mass DVA’s
with masses collisions for additional damping.
For some cases of DVA optimization
such a design seems more effective than conventional
multi-mass DVA with independent
mass moving. A technique is developed to
give the optimal DVA’s for the elimination
of excessive vibration in harmonic stochastic
and impact loaded systems.
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