DAMPING ANALYSIS OF PATCHED LAYERED SORBOTHANE

Abstract

Sound and vibration damping is the key aspect in the most of the structures. The viscoelasticity property can be used to reduce vibrations. Many polymers are used as a viscoelastic damper in Constrained layer damping(CLD) and Free layer damping. Sorbothane is basically, visco-elastic in the form of polymer. Visco-elastic property is related to the material exhibits properties of both liquids (viscous) and solids (elastic). The polymer Sorbothane is a thermoset by nature, polyether-based, polyurethane material. Sorbothane have shock absorption capacity and good memory, vibration damping characteristics and vibration isolation. In addition to this, Sorbothane polymer is a excellent acoustic damper and absorber. Damping loss factor is calculated for different Patches on cantilever beam with modal analysis on NI LabView and ANSYS.