In-Plane Vibration of Membrane Strips and Sheets with Piezoelectric Actuation and Sensing

摘要

The studies reported on in this paper are of relevance to automated diagnosis of light weight space structures based on membranes. We investigate in-plane vibration response of membranes to in-plane actuation. Iden-tically shaped piezoelectric polymer strips are used both for actuation and sensing. For membrane strips, the frequency response function is obtained using an in-plane vibration model. The model for the intact membrane is then modified to analyze the effect of a transverse crack at mid-span. The theoretical results are compared with experimental measurements. Experiments on a cracked strip show small differences in the frequency re-sponse function, which are qualitatively borne out by the theoretical calculations. Some experimental results on membrane sheets are also presented.