Dynamic stiffness of natural rubber cylinders in the audible frequency range using wave guides

This paper applies a wave guide model to analyze the temperature influence on the dynamic stiffness of a cylindrical vibration isolator of natural rub ber in the audible frequency range; covering 20 to 20 000 Hz and - 60 to 60 degreesC. A nearly incompressible material model is applied with shear m odulus based on a fractional derivative model, thereby reducing the paramet er number needed to accurately fit measurement results. Employing the metho d of reduced variables enlarges the frequency range available from measurem ents. Of particular interest are the stiffness peaks and troughs, the low-f requency stiffness, the propagating and nonpropagating modes, and their dep endence on temperature.