Change of Natural Frequency of Magnetic Elastomer Beam by Applying Magnetic Field

Abstract

Natural frequency of magnetic elastomer beam is changed by applying a magnetic field. Relations of change of the natural frequency of magnetic elastomer beam and applying a magnetic field were investigated experimentally to develop a device using the phenomenon. The magnetic elastomer consists of a silicone gum and micrometer size iron powder. Furthermore, a longitudinal modulus of elasticity and logarithmic damping ratio of the magnetic elastomer were measured. And influence on the natural frequency was considered. As a result, it was revealed that the longitudinal modulus of elasticity and the logarithmic damping ratio of the magnetic elastomer hardly affected the natural frequency change.