LAUSR

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.