Acoustic characteristics of damped metamaterial plate with parallel attached resonators

• Autorzy: Wang T. , Sheng M. P. , Guo Z. W. , Qin Q. H.
• Języki publikacji: EN

Abstrakty

EN

An acoustic metamaterial consisting of a homogeneous damped plate with parallel attached resonators is presented. Theoretical analysis shows that the metamaterial plate can generate multiple resonant-type band gaps and the lower-bound frequency of each band gap coincides with the resonance frequencies of the resonators. The parallel arrangement of resonators, compared with the metamaterial plate with resonators attached in series reported by Peng et al. (2015), results in a wider second band gap with a lower edge, while the first band gap is almost the same, creating therefore an easier combination of the multiple band gaps into a wider one. It is noted that damping has a significant influence on the band gaps and the effective mass density (especially for the damping of resonators). Specifically, it can be concluded that damping cannot be neglected in practical engineering applications, damping in the material of the host plate can smooth and lower the responses in the whole frequency range, especially in the higher frequency range, and a high level of damping of resonators deactivates the effect of band gaps. Such weak/damped resonators actualise the metamaterial damping poorly, and rather tend only to contribute to the overall damping such as the damping of the host plate.

Słowa kluczowe

EN

acoustic metamaterial plate; damping effect; negative mass density; flexural wave propagation

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2017
• Tom: Vol. 69, nr 1
• Strony: 29--52
• Opis fizyczny: Bibliogr. 37 poz., rys. kolor.

Twórcy

autor

Wang T.

• School of Marine Science and Technology Northwestern Polytechnical University Xi’an, Shaanxi, P.R. China 710072
• College of Engineering and Computer Science the Australian National University Acton, ACT, Australia 2601

autor

Sheng M. P.

• School of Marine Science and Technology Northwestern Polytechnical University Xi’an, Shaanxi, P.R. China 710072

autor

Guo Z. W.

• School of Marine Science and Technology Northwestern Polytechnical University Xi’an, Shaanxi, P.R. China 710072

autor

Qin Q. H.

• College of Engineering and Computer Science the Australian National University Acton, ACT, Australia 2601

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).