Experimental validation of a novel smart electromechanical tuned mass damper beam device

S. Rafique, P. Bonello, R. Shuttleworth

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    Abstract

    This paper validates the novel concept of utilising piezoelectric vibration energy harvesting (PVEH) beams as a tuned mass damper (TMD) - which suppresses a particular vibration mode of a generic host structure over a broad band of excitation frequencies. The proposed device comprises a pair of bimorphs shunted by a resistor, capacitor and inductor connected in various alternative circuit configurations. A benchmark for the performance is established through Den Hartog's theory for the optimal damping of a classical TMD. Experimental results demonstrate that such optimal damping is equivalently generated by the PVEH effect for appropriately tuned circuitry. These results correlate reasonably well with the results of a theoretical analysis introduced in a previous paper. The proposed TMD beam device combines the relative advantages of the classical ('mechanical') TMD and the shunted piezoelectric patch ('electrical' vibration absorber), presenting the prospect of a functionally more readily-adaptable class of 'electromechanical' tuned vibration absorbers. Moreover, with further development, this dual PVEH/TMD beam device holds the potential of simultaneous energy storage. © 2013 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)4912-4926
    Number of pages14
    JournalJournal of Sound and Vibration
    Volume332
    Issue number20
    DOIs
    Publication statusPublished - 30 Sept 2013

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