EXPERIMENTAL STUDY ON VIBRATION CONTROL OF BEAMS WITH VISCOELASTIC CONSTRAINED DAMPING FOIL

摘要

The use of constrained viscoelastic damping layer provides an efficient way for vibration control of engineering structures under dynamic loadings. In this paper, experimental study on the vibration control of steel and aluminum cantilever beams with different viscoelastic constrained damping foil arrangements by orthogonal test is carried out and the effects of the position and the width of the viscoelastic constrained damping layers on the vibration control are investigated. By using wavelet packet analysis, results show that the viscoelastic constrained damping foil is a type of effective material for passive vibration control of flexible structure members. The control effect for steel beam is better than that of the aluminum beam. Multivariate analysis of variance of the orthogonal test results and F-test show the position of the viscoelastic constrained damping foil is the dominant factor which affects the vibration control of the beams.