Effects of Viscoelastic Vibration Damping Device Having a Stiff Constraint Layer on Resonance Responses of Frame Structure

Abstract

This paper describes numerical simulation of dynamic characteristics of the L shaped angle equipped with a new vibration damping device. The device includes blocks of viscoelastic gels and a constraint layer having a box cross section. The gel blocks are sandwiched between the constraint layer and the test structure. Damping performances are investigated by the numerical computation using the finite element method and modal strain energy method. We evaluate the influences of the new vibration damping device on the oscillation characteristics of the L shaped angle bar using eigen modes, modal loss factors and resonance frequencies