Abstract
The damping of a structure can be obtained by a transfer of the vibratory energy into thermal energy (dissipation in an electrical resistance). The transfer is carried out by using piezoelectric materials (PZT piezoelectric plate) and is improved by charging the piezoelectric material by an electrical circuit. This chapter describes finite element-electric circuit matrices created in the ATILA code. First, analytical models have been developed for the damping of a piezoelectric cylinder and a cantilever beam with a PZT plate; the results are compared with the numerical values (ATILA). Then, the damping of a cantilever beam charged by an electrical circuit is measured at the end of the beam using a laser vibrometer and compared with the numerical results. Finally, the vibrations damping is studied on a large aluminium plate; experimental and numerical results are compared.
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