超材料
振动
隔振
磁铁
多波段设备
频带
声学
材料科学
物理
光电子学
光学
带宽(计算)
计算机科学
天线(收音机)
电信
量子力学
作者
Tianxi Jiang,Qingbo He
摘要
This letter reports a dual-directionally tunable acoustic metamaterial comprising a matrix and two spiral beams with an embedded permanent magnet. Two types of vibration modes associated with band gaps can be excited under out-of-plane and in-plane excitations. The out-of-plane and in-plane transmissions of the metamaterial move toward two directions because of their modal characteristics when external magnets are introduced to tune the magnetic force monotonically. The mechanism of the dual-directional tunability is theoretically clarified. A composite dual-directionally tunable metamaterial prototype achieves the flexible tuning of the metamaterial band gap. Such effect provides broad application prospects for low-frequency vibration isolation in practical environments.
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