Study on the underwater acoustic performance of CFRP laminate modified by PZT particle

Abstract

A carbon fiber-reinforced plastic (CFRP) laminate modified by lead-zirconate-titanate (PZT) particles was fabricated in this study. The simulation on underwater acoustic radiation of the modified laminate was carried out by fluid-solid coupled finite element method and acoustic direct boundary element method. Furthermore, the underwater acoustic radiation of the composite laminate modified by PZT particle was studied by the underwater experiment performed over a range of frequency (20∼1500Hz) and angle (0∼180 degree). The results show that the maximum underwater radiated sound power of CFRP laminate obviously reduced by the PZT particles interlayer doping method and the radiation peaks moved to high frequency, which was beneficial to attenuate underwater noise caused by CFRP composite structure.