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Article Dans Une Revue Applied Acoustics Année : 2021

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

Résumé

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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Dates et versions

hal-03222552 , version 1 (10-05-2021)

Identifiants

  • 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, 2021. ⟨hal-03222552⟩
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