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Dynamic analysis of passive vibration control of sma-se coil spring structural model

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Document pages: 15 pages

Abstract: Mechanical vibration is a serious phenomenon in the physical world. These oscillations may become undesirable and may cause temporary or even irreversible damage to the system. Several techniques can minimize these vibration effects, from passive methods to controllers using smart materials. In this sense, this study aims to analyze the passive vibration control system installed in the simulated two-story building structure. The system is based on a sma-se (hyperelastic shape memory alloy) coil spring configuration to dissipate energy and increase damping. Modal analysis is carried out by analytical, numerical and experimental methods. On the basis of experiments, the response amplitudes of free vibration and forced vibration are analyzedn different configurations. As compared with the structure configuration with steel spring, the forced vibrations FRF (Frequency Response Function) analysis showed a reduction in displacement transmissibility of up to 51 for the first modal shape and 73 for the second mode in the SMA-SE coil spring configuration. As for damping, there was a considerable increase in the order of 59 in the first mode and 119 in the second, for the SMA-SE springs configuration.

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