ASA 125th Meeting Ottawa 1993 May

3pSA5. Modeling the sensor/actuator response of a finite disk transducer flush mounted on a plate subject to fluid loading.

Vasundara V. Varadan

Jaehwan Kim

Vijay K. Varadan

Res. Ctr. for the Eng. of Electron. and Acoust. Mater., Dept. of Eng. Sci. and Mech., Penn State Univ., University Park, PA 16802

It is important to model the sensor and actuator function of a finite disk-shaped piezoelectric transducer in the environment that it will function in. This will involve taking into account the structure on which it is mounted, modeled here as a flat, solid, elastic plate and fluid loading to which the structure may be subject to. In addition, material damping in the plate and the transducer must be taken into account. The sensor response involves computation of the voltage induced in the transducer by an incident acoustic wave in the fluid or a force to which the plate may be subjected to. The actuator response involved computation of the acoustic field radiated into the fluid when the transducer is subject to a known voltage. A hybrid numerical method involving finite element modeling in the plate and transducer region and a plane wave representation in the fluid region will be used. [Work supported by ONR.]