Abstract
This article presents the modelling estimation and performance evaluation for vibration isolator. The main objective of this study is to develop a mathematical model to characterize the isolation performance of the vibration isolators. By using modification of lumped parameter system, the rubber layer in vibration isolator was divided into multiple elements of masses and springs to predict the equivalent internal resonance (ωn) of the isolator. It was found that by adding more metal plates in the rubber, more resonances existed in the transmissibility which degraded the isolation performance. After 1.4ωn, the transmissibility decreases with the increase of frequency. However, the isolation at high frequencies showed an improved performance compared to the case of spring without embedded metal plates. The resonance can be reduced by adding more damping to the vibration isolators.
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