Annular acoustic black holes to reduce propagative Bloch-Floquet flexural waves in periodically supported cylindrical shells

Deng Jie, Guasch Oriol, Maxit Laurent, Zheng Ling

科研成果: 书/报告/会议事项章节会议稿件同行评审

4 引用 (Scopus)

摘要

Current designs of acoustic black holes are mainly intended for straight beams and flat plates. However, many structures of interest in naval and aeronautical applications essentially consist in a periodically stiffened cylindrical shell, which could benefit from the acoustic black hole (ABH) effect to reduce vibrations and noise radiation. In this work, we suggest the design of annular ABHs to that purpose. To test the feasibility of such annular ABHs we consider the idealized case of a periodically simply supported cylindrical shell of infinite length. Such a structure allows for the propagation of Bloch-Floquet flexural waves at some passbands, which can play an important role in the radiation of noise at the far field. By means of wave finite element models, we show that the proposed annular ABHs constitute an effective way of reducing the shell flexural motion.

源语言英语
主期刊名INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering
编辑Antonio Calvo-Manzano, Ana Delgado, Antonio Perez-Lopez, Jose Salvador Santiago
出版商SOCIEDAD ESPANOLA DE ACUSTICA - Spanish Acoustical Society, SEA
ISBN(电子版)9788487985317
出版状态已出版 - 2019
已对外发布
活动48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID - Madrid, 西班牙
期限: 16 6月 201919 6月 2019

出版系列

姓名INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering

会议

会议48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID
国家/地区西班牙
Madrid
时期16/06/1919/06/19

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