Abstract
In vibration control with piezoceramics, a high coupling of the
piezoelement with the structure is desired. A high coupling improves the
damping performance of passive techniques like shunt damping. The coupling
can be influenced by a the material properties of the piezoceramics, but
also by the placement within the structure and the size of the transducer.
Detailed knowlegde about the vibration behavior of the structure is
required for this. This paper presents an in-depth analysis of the optimal
shape of piezoelectric elements. General results for one-dimensional, but
inhomogeneos strain distribution are provided. These results are applied
to the case of a longitudinal transducer and a bending bimorph. It is
obtained that for maximum coupling, only a certain fracture of the volume
should be made of piezoelectric material&
Go to article