Optimization of passive vibration isolators mechanical characteristics |
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Authors: | Zuzana Dimitrovová Hélder C Rodrigues |
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Affiliation: | 1. UNIC, Department of Civil Engineering, New University of Lisbon, Lisbon, Portugal 2. IDMEC, Instituto Superior Técnico, UT Lisbon, Lisbon, Portugal
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Abstract: | The contribution of optimization has been essential to the more recent developments in design of new mechanical structures
and materials. The objective of this work is to apply the models of material and structural optimization to the design of
passive vibration isolators. A computational tool to identify the optimal viscoelastic characteristics of a nonlinear one-dimensional
isolator was developed. The cost functional involves the minimization of a weighted average of the maximum transient and steady
state response amplitudes for a set of predefined dynamic loads. The optimal isolator behaviour is obtained by a simulated
annealing method. The solutions obtained are analyzed and discussed concerning their dependence on the applied forces and
objective function selection. The results obtained can facilitate the design of elastomeric materials with improved behaviour
in terms of dynamic stiffness for passive vibration control. |
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