Optimization design of acoustic black hole structures by embedding disordered hyperuniform phononic crystals
Yulei Wang, Jihong Zhu, Liang Meng, Tao Liu, Weihong Zhang
Abstract
Incorporating the unique energy concentration features of acoustic black hole (ABH) and frequency band gaps of phononic crystals, this paper presents an optimization approach for the acoustic black hole structure by embedding disordered hyperuniform phononic crystal (ABH-DHPC). The operating frequency of the design ABH-DHPC is achieved by manipulating the band-gaps of the DHPC. Specifically, the current work establishes an optimization design method for DHPC band gaps by using an equivalent unit cell instead of the supercell of DHPC to calculate the band gap. The ABH-DHPCs, ranging from 1 mm to 100 m, are meticulously crafted to operate within the frequency range of 0.1–100 kHz. Lastly, samples of centimeter size, manufactured using this method, exhibited a remarkable 40-fold enhancement in vibration response during experiments conducted at 1–2 kHz.