Analyzing Resonant Frequency of 1-3-2 Piezoelectric Composite with Multi-Mode

1-3-2 piezoelectric composite has been widely used in the field of underwater acoustic transducer. In this paper, Series-parallel model is used to make the theoretical derivation of the resonant frequency of 1-3-2 piezoelectric composite. By using numerical calculation the law of the frequency varying with the cutting depth is gained. It provides theoretical basis for the design of the 1-3-2 piezoelectric composite with multi-mode.