Passive Viscoelastic Constrained Layer Damping for Beams

Beam is basic components in industrial structural design whose damping properties are often very important to reduce vibration. Viscoelastic materials are generally polymers; there is enormous variability in the composition of viscoelastic materials. Rubber is a unique material that is both elastic and viscous. Rubber parts can therefore function as shock and vibration isolators and/or as dampers. In this research Butyl rubber is viscoelastic material which is acting as the damping layer, steel and aluminum patches are used as constrained layer. Here, change in length of patch and damping layer is varied for constant length and thickness of base layer. The lengths of patches are varied as 25%, 50%, 75% and 100%. These patches also arranged in segment and hybrid. Two sets of specimens are prepared for aluminium and steel constrained layer. Damping characteristics of beam are determined by experimental and analytically by using FFT analyzer and ANSYS software respectively. Citation: G Selvakumar, Jay Shriram Group of Institutions; Sampathkumar N ,Jay Shriram Group of Institutions. "Passive Viscoelastic Constrained Layer Damping for Beams." Global Research and Development Journal For Engineering 212 2017: 14 - 17.