Structural acoustic control of a one side loaded circular plate with piezoelectric actuators

The experiment presented in this paper is a part of an ongoing research project connected with the structural acoustic control in one side fluid loading structures. The system considered in the study is built up of a thin, circular plate and eight square piezoelectric elements. The plate is clamped along its edge by finite rigid co-planer baffle. The baffle with other four rigid walls is formed aquarium filled with water. Numerical computations utilize the FEM approach supported by Ansys software. The natural frequencies were determined using modal analysis. The harmonic analysis covers the acoustic radiation due to steady-state plate vibrations for the first two modes of natural vibrations. Each mode was examined individually. The test results indicate that actuators as flexural wave-source can decrease the displacement response as well as sound radiation for a pure tone input.