Phononic crystals(PCs) have recently been developed as effective components for vibration suppression and sound absorption. As a typical design of PCs, wave attenuation occurs in the so-called stop-band. However, the ...Phononic crystals(PCs) have recently been developed as effective components for vibration suppression and sound absorption. As a typical design of PCs, wave attenuation occurs in the so-called stop-band. However, the structural response is still significantly large in the pass-band. In this paper, we combine PCs and acoustic black holes(ABHs) in a unique device, achieving a versatile device that can attenuate vibration in the stop-band, while suppress vibration in the pass-band. This approach provides a versatile platform for controlling vibration in a multiband with a simple design.展开更多
In this paper,an electrically active,ultra-thin,easy-to-implement,and tunable phononic crystal(PC)-based device is proposed to suppress excessive vibration in pipes conveying fluids.We demonstrate that this device can...In this paper,an electrically active,ultra-thin,easy-to-implement,and tunable phononic crystal(PC)-based device is proposed to suppress excessive vibration in pipes conveying fluids.We demonstrate that this device can be realized by periodic implementation of piezoelectric patches with shunt circuits on the pipe acting as PCs for vibration suppression.The mathematical model of the pipe structure is simplified to the form of the Euler Bernoulli beam,and the transfer matrix method and the finite element method are used to predict the effective bandgap.Conversion between mechanical vibration energy and electrical energy via the piezoelectric effect is observed.As a result,the pipe vibration is suppressed by combined Bragg and electroelastic bandgaps.The comparison with previous literature shows that this ultra-compact device provides a new solution for vibration and noise control in long-distance fluid-conveying pipe systems.展开更多
基金Project supported by the National Natural Science Foundation of China(Nos.51575378,11972245,and 11672187)。
文摘Phononic crystals(PCs) have recently been developed as effective components for vibration suppression and sound absorption. As a typical design of PCs, wave attenuation occurs in the so-called stop-band. However, the structural response is still significantly large in the pass-band. In this paper, we combine PCs and acoustic black holes(ABHs) in a unique device, achieving a versatile device that can attenuate vibration in the stop-band, while suppress vibration in the pass-band. This approach provides a versatile platform for controlling vibration in a multiband with a simple design.
基金the Natural Science Foundation of China[Grant Numbers 11972245,11672187,11902001]the China Postdoctoral Science Foundation funded project[Grant Number 2018M641643].
文摘In this paper,an electrically active,ultra-thin,easy-to-implement,and tunable phononic crystal(PC)-based device is proposed to suppress excessive vibration in pipes conveying fluids.We demonstrate that this device can be realized by periodic implementation of piezoelectric patches with shunt circuits on the pipe acting as PCs for vibration suppression.The mathematical model of the pipe structure is simplified to the form of the Euler Bernoulli beam,and the transfer matrix method and the finite element method are used to predict the effective bandgap.Conversion between mechanical vibration energy and electrical energy via the piezoelectric effect is observed.As a result,the pipe vibration is suppressed by combined Bragg and electroelastic bandgaps.The comparison with previous literature shows that this ultra-compact device provides a new solution for vibration and noise control in long-distance fluid-conveying pipe systems.
