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Active-control local resonant metamaterial device for low-frequency vibration isolation
The invention discloses an active-control local resonant metamaterial device for low-frequency vibration isolation. The active-control local resonant metamaterial device comprises a matrix beam, wherein local oscillators are periodically mounted on the upper surface and the lower surface of the matrix beam through connecting rods; the local oscillators positioned on the upper surface and the lower surface of the matrix beam are symmetrically arranged so as to form double-oscillator structures; each connecting rod is provided with a piezoelectric sheet; each piezoelectric sheet is connected with a negative capacitance circuit; and the equivalent Young's modulus of each piezoelectric sheet is adjusted through the negative capacitance circuit and then energy is transmitted to the corresponding local oscillator, so that the propagation of different-frequency bent waves can be controlled.
本发明公开一种用于低频隔振的主动控制局域共振超材料装置，包括基体梁，所述基体梁的上表面和下表面均通过连杆周期性的安装有局域振子，位于基体梁的上表面和下表面的局域振子均相互对称设置，形成双振子结构；每个连杆上均设置有压电片，每个所述压点片均与负电容电路连接，通过负电容电路调节压电片的等效杨氏模量将能量传给局域振子，以控制不同频率的弯曲波的传播。
Active-control local resonant metamaterial device for low-frequency vibration isolation
The invention discloses an active-control local resonant metamaterial device for low-frequency vibration isolation. The active-control local resonant metamaterial device comprises a matrix beam, wherein local oscillators are periodically mounted on the upper surface and the lower surface of the matrix beam through connecting rods; the local oscillators positioned on the upper surface and the lower surface of the matrix beam are symmetrically arranged so as to form double-oscillator structures; each connecting rod is provided with a piezoelectric sheet; each piezoelectric sheet is connected with a negative capacitance circuit; and the equivalent Young's modulus of each piezoelectric sheet is adjusted through the negative capacitance circuit and then energy is transmitted to the corresponding local oscillator, so that the propagation of different-frequency bent waves can be controlled.
本发明公开一种用于低频隔振的主动控制局域共振超材料装置，包括基体梁，所述基体梁的上表面和下表面均通过连杆周期性的安装有局域振子，位于基体梁的上表面和下表面的局域振子均相互对称设置，形成双振子结构；每个连杆上均设置有压电片，每个所述压点片均与负电容电路连接，通过负电容电路调节压电片的等效杨氏模量将能量传给局域振子，以控制不同频率的弯曲波的传播。
Active-control local resonant metamaterial device for low-frequency vibration isolation
一种用于低频隔振的主动控制局域共振超材料装置
WANG YIZE (author) / ZHANG ZICHUN (author) / TAN JINGYUAN (author)
2021-10-22
Patent
Electronic Resource
Chinese
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