Experimental and theoretical investigation of the 2:1 internal resonance in the higher-order modes of a MEMS microbeam at elevated excitations
| Autor: | Mohammad I. Younis, Mohammed Lamine Faycal Bellaredj, Lakshmoji Kosuru, Nizar Jaber, Laura Ruzziconi |
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| Rok vydání: | 2021 |
| Předmět: |
Microelectromechanical systems
Physics Acoustics and Ultrasonics Mechanical Engineering Mode (statistics) Experimental data 02 engineering and technology Microbeam Condensed Matter Physics Space (mathematics) 01 natural sciences Computational physics 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials 0103 physical sciences Attractor 010301 acoustics Bifurcation Voltage |
| Zdroj: | Journal of Sound and Vibration. 499:115983 |
| ISSN: | 0022-460X |
| Popis: | We analyze the dynamics induced by a 2:1 internal resonance between the third (second symmetric) and the fifth (third symmetric) mode of a MEMS microbeam. An extensive experimental investigation is conducted, where forward and backward sweeps are systematically acquired up to elevated excitations. As ramping the voltage, a change along the forward sweep of the resonant branch is noted. This is analyzed via the combined use of different analytical and numerical tools, which show a phase shift between the modes involved in the 2:1 internal resonance. Constantly referring to the experimental data, simulations examine the underlying features of the system's behavior. The dynamics observed in the experimental frequency sweeps are part of a more complex scenario, where different attractors appear and coexist. The experimental behavior bifurcation chart is reported and compared with simulations, which offers a comprehensive view of the 2:1 internal resonance activation. The concurrence of numerical results and experimental data confirms on the effective actuality of these complex features in safe conditions, along wide ranges of the parameters space. |
| Databáze: | OpenAIRE |
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