Platelike Dynamic Vibration Absorbers

Abstract

Platelike dynamic vibration absorbers of novel design are described, and optimum values of their tuning and damping parameters are specified in graphical form. The dynamic absorbers are assumed to comprise either a circular or an annular damped plate that is loaded at its outer perimeter by a rigid annular mass. The plates, which act as combined “spring-and-damper” components for the absorber systems considered, are attached either at their midpoint or around their inner perimeter to the vibrating item or structure of concern. The platelike absorbers are shown to be very effective in suppressing the transmissibility at resonance (1) across a mass-spring vibrator, and (2) across circular and rectangular plates that have small internal damping and that are used to simulate bulkheads and panels. The platelike absorbers have the advantages of mechanical simplicity and planar geometry for compact flush-mounted application.