摘要
A lightweight-high-stiffness beam insulator embedded with graded double-leaf acoustic black holes (G-DABHs) was designed and fabricated to mitigate broadband low-frequency vibration. The insulator, over 40% lighter than the regular beam, exhibits ultra-broadband low-frequency vibration insulation performance with average transmission of 0.8% (635 Hz-20 kHz) or lower if it becomes a bit lossier. This exotic insulation arises from multimodal-And-coupled-multimodal wave trapping by the G-DABHs and amplified dissipation due to metadamping occurrence. The insulator also exhibits both broader vibration damping and higher static stiffness compared with conventional periodic ABH-beam-counterparts, and thus provides a lightweight-And-high-stiffness solution for ultra-broadband low-frequency vibration control.
源语言 | 英语 |
---|---|
文章编号 | 017007 |
期刊 | Applied Physics Express |
卷 | 13 |
期 | 1 |
DOI | |
出版状态 | 已出版 - 1 1月 2020 |