Selective mode excitation in elastic waveguides by piezoceramic actuators

摘要

The problem of a single required mode (or several modes) excitation in a plate-like structure by a system of thin flexible piezoelectric patches is considered. The algorithm for obtaining proper driving fields is developed in the context of a 2D mathematical model (strip patches on a layer), which takes strictly into account the patch-structure contact interaction, the mutual influence of the actuators and the multimode character of traveling waves propagation in the substructure. Numerical results illustrate the high level of selectivity provided by the method proposed.