Research on the Processing Method of Acoustic Focusing Cavities Based on the Temperature Gradient

Aiming at the key factors affecting quality and efficiency of high-energy in-beam machining, this paper studies broadband acoustic focusing effect based on a discrete temperature gradient. Firstly, basic theory mathematical model temperature-controlled are established. Secondly, is achieved by combining design metasurfaces temperature. Then, pressure intensity distribution under gradient simulated experimentally studied. The results show that phase delay transmission reflection wave covers 2π interval changing in different units, which provides theoretical basis for processing cavity.