The purpose of this paper is to explain, by the soliton theory, the subharmonicgeneration in piezoelectric plates with Cantor-like structure (PCS). Craciun etal. [1] and Alippi et al. [2-4] have shown the experimental evidence ofextremely low thresholds for subharmonic generation of ultrasonic waves in onedimensionalPCS, as compared to the corresponding homogeneous and periodicalstructures. The origin of this apparent anomaly was theoretically investigatedby the same scientists by studying anharmonic coupling between normal modes.
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