Vibro-acoustic analysis of auxetic hexagonal and anti-tetrachiral stepped cantilever beams

Saman Farhangdoust; Ibrahim Adetola Adediran; Mostafa Ranjbar; Anastasiia O. Krushynska

doi:10.1117/12.2583341

22 March 2021 Vibro-acoustic analysis of auxetic hexagonal and anti-tetrachiral stepped cantilever beams

Saman Farhangdoust, Ibrahim Adetola Adediran, Mostafa Ranjbar, Anastasiia O. Krushynska

Proceedings Volume 11593, Health Monitoring of Structural and Biological Systems XV; 115930N (2021) https://doi.org/10.1117/12.2583341
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

This research develops lightweight stepped cantilever beams using two auxetic hexagonal and anti-tetrachiral designs to reduce sound radiation from vibrating modes of attached structures. A finite element analysis (FEA) is employed to investigate the equivalent radiated power level (ERPL) of the proposed beams subjected to different excitations. A computational parametric study is performed to minimize the ERPL for two in-plane and out-of-plane configurations of the beams over a frequency range of 0 Hz to 1200 Hz. The vibro-acoustic responses of the beams are validated by two acoustic techniques of the radiated sound pressure level (RSPL) and far-field sound pressure level (FFSPL). Numerical results demonstrate an excellent vibro-acoustic performance in reducing the radiated sound power level for the beams. The proposed beams can be utilized for high-tech devices where the radiated noise control is desired. This paper opens up a great potential of using auxetic stepped cantilever beams for various engineering applications in Acoustics, Civil, Aerospace, Biomedical, and Mechanical Engineering.

Citation Download Citation

Saman Farhangdoust, Ibrahim Adetola Adediran, Mostafa Ranjbar, and Anastasiia O. Krushynska "Vibro-acoustic analysis of auxetic hexagonal and anti-tetrachiral stepped cantilever beams", Proc. SPIE 11593, Health Monitoring of Structural and Biological Systems XV, 115930N (22 March 2021); https://doi.org/10.1117/12.2583341

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