Dynamics of Microbeams under Multi-Frequency Excitations

Alwathiqbellah Ibrahim, Nizar Jaber, Akhil Chandran, Maloth Thirupathi, Mohammad I. Younis

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

This paper presents an investigation of the dynamics of microbeams under multiple harmonic electrostatic excitation frequencies. First, the response of a cantilever microbeam to two alternating current (AC) source excitation is examined. We show by simulations the response of the microbeam at primary resonance (near the fundamental natural frequency) and at secondary resonances (near half, superharmonic, and twice, subharmonic, the fundamental natural frequency). A multimode Galerkin method combined with the Euler-Bernoulli beam equation, accounting for the nonlinear electrostatic force, has been used to develop a reduced order model. The response of the cantilever microbeam to three AC source excitation is also investigated and shown as a promising technique to enhance the bandwidth of resonators. Finally, an experimental study of a clamped-clamped microbeam is conducted, demonstrating the multi-frequency excitation resonances using two, three, and four AC sources.
Original languageEnglish (US)
Pages (from-to)32
JournalMicromachines
Volume8
Issue number2
DOIs
StatePublished - Jan 24 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research has been funded through King Abdullah University of Science and Technology (KAUST).

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