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Experimental evidence of energy transfer and vibration mitigation in a vibro-impact acoustic black hole

Abstract : An experimental demonstration of the broadband passive damping capacity of a vibro-impact acoustic black hole (VI-ABH) is reported. A VI-ABH is an adaptation of the classical ABH design consisting of a beam with a tapered edge of decreasing thickness creating an acoustic black hole (ABH), complemented by contact points on which the beam impacts during its vibration. The contact nonlinearity creates a rapid and efficient transfer of vibrational energy from the low-frequency range, where the ABH is known to be ineffective, to the high-frequency range, thus improving the global passive vibration mitigation characteristics. The optimal design of a VI-ABH follows the rule of locating the contact points at local maxima of the low-frequency modes. Experiments clearly demonstrate the gain in performance, both in forced and free vibrations.
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https://hal.archives-ouvertes.fr/hal-03222552
Contributor : Cyril Touzé Connect in order to contact the contributor
Submitted on : Monday, May 10, 2021 - 12:24:27 PM
Last modification on : Friday, May 28, 2021 - 11:31:52 AM
Long-term archiving on: : Wednesday, August 11, 2021 - 7:20:14 PM

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  • HAL Id : hal-03222552, version 1

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Haiqin Li, Mathieu Sécail-Géraud, Adrien Pelat, François Gautier, Cyril Touzé. Experimental evidence of energy transfer and vibration mitigation in a vibro-impact acoustic black hole. Applied Acoustics, Elsevier, 2021. ⟨hal-03222552⟩

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