We analyse the dynamical behaviour of a harmonically excited piezoceramic in dependence on certain design parameters. In particular, we explore its dynamics in dependence on its geometrical shape as well as the influence of nonlinear terms in the associated equations of motion. First we derive a two point boundary value problem whose solutions yield certain eigenfunctions of the linearized mode...

This paper describes the use of micromachined lead zirconate titanate (PZT) piezoceramic elements for heat generation by ultrasonic energy dissipated within the elements and surrounding media. Simulations based on three-dimensional finite-element models suggest that circular disk-shaped elements provide superior steady-state temperature rise for a given cross-sectional area, volume of the PZT e...

The use of piezoelectric wafer active sensors (PWAS) for structural health monitoring (SHM) purposes is state of the art for acousto-ultrasonic-based methods. For system reliability, detailed information about the PWAS itself is necessary. This paper gives an overview on frequent PWAS faults and presents the effects of these faults on the wave propagation, used for active acousto-ultrasonics-ba...

The studies on vibration frequency as well loading capacity of slender systems are very important issues in the design process. Integration smart materials with host structures allows one to create constructions which able adjust different conditions. piezo material belongs group. Application voltage piezoparts leads induction forces can cause prestressing structure. use piezoceramic elements i...

The article focuses on the research of processes summation ultrasonic vibrations individual Langevin transducers symmetrically arranged a common summator. This design could be used to solve problem increasing power high-frequency radiator by means transducers. results presented theoretical and experimental investigations supported possibility symmetrical diametrical when they are transformed in...