Title :
Acoustic modes in 2-dimensional self-similar composite plates
Author :
Alippi, A. ; Bettucci, A. ; Craciun, F. ; Farrelly, F. ; Molinari, Elisa ; Petri, Alessandra
Author_Institution :
Istituto di Acustica, CNR, Rome
fDate :
31 Oct-3 Nov 1993
Abstract :
We present the first experimental investigation of a Sierpinski carpet structure. This was constructed from piezoelectric square plates embedded in a polymer matrix according to a 4th generation Sierpinski carpet. The resonant frequencies and vibrational displacement patterns have been measured. Experimental evidence for the existence of localised modes, together with a simple model for the estimation of the spectral density of states ds, are presented
Keywords :
fractals; lattice theory and statistics; piezoelectric devices; ultrasonic devices; Sierpinski carpet structure; localised modes; piezoelectric square plates; polymer matrix; resonant frequencies; self-similar composite plates; spectral density; vibrational displacement patterns; Ceramics; Concurrent computing; Displacement measurement; Fractals; Frequency measurement; Optical interferometry; Physics computing; Polymers; State estimation; Vibration measurement;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339553
