Effect of PCLD Treatment Configuration on Damping Performance of Flexible Cantilever Beam

Abstract

For many years vibration damping has been an important criterion in the design phase of many engineering
applications. Large dissipation capabilities over a wide frequency range are desired. A common solution is to use a
constrained viscoelastic material bonded to the vibrating structure. The damping material is applied in a sandwiched
configuration. The shear deformation occurring in the viscoelastic core is mainly responsible for the dissipation of
energy. In a passive constraining layer damping treatment, a visco-elastic layer and a constraining layer is added to a
conventional base beam. Three different types of visco-elastic materials have been used as a core for sandwich beam
to ensure damping effect. Four different types of constraining layer materials is used. It is predicted which
constraining layer material is giving good damping effect. MATLAB codes have been developed to obtain the results
theoretically. The result shows a considerable amount of decrease in amplitude for a damped system as compared to
undamped system.