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Design of New Materials for Passive Vibration Control
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Orientador(es)
Resumo(s)
The objective of this contribution is to extend the models of cellular/composite
material design to nonlinear material behaviour and apply them for design of
materials for passive vibration control. As a first step a computational tool allowing
determination of optimised one-dimensional isolator behaviour was developed. This
model can serve as a representation for idealised macroscopic behaviour. Optimal
isolator behaviour to a given set of loads is obtained by generic probabilistic metaalgorithm,
simulated annealing. Cost functional involves minimization of maximum
response amplitude in a set of predefined time intervals and maximization of total
energy absorbed in the first loop. Dependence of the global optimum on several
combinations of leading parameters of the simulated annealing procedure, like
neighbourhood definition and annealing schedule, is also studied and analyzed.
Obtained results facilitate the design of elastomeric cellular materials with improved
behaviour in terms of dynamic stiffness for passive vibration control.
Descrição
Palavras-chave
cellular materials design, passive vibration control, non-linear visco-elastic