Design of vibration characteristic of multi-axial dynamic vibration absorber composed of a ball-like mass embedded in spherical viscoelastic material

Abstract

This paper describes the measurement of vibration characteristics of the eMDVA (embedded Mass Vibration Absorber) and investigation to build a finite element (FE) model to express the measurement results correctly. The eMDVA is proposed by one of the authors as a multi-modal and multi-axis vibration reduction device; it consists of spherical viscoelastic material with embedded ball-like mass. In this study, some eMDVAs with different sizes of spherical viscoelastic material containing ball-like mass with a 3-axes acceleration pickup were made, and vibration measurement tests were carried out. Then FE models of the eMDVAs were built. The modeling of the viscoelastic properties of the viscoelastic sphere were especially discussed.