Abstract
Dynamic excitation results in vibration of machinery and the support structures. Structural damping treatment i.e. Free layer damping (FLD) and Constrained layer damping (CLD) are passive control methods that consist of sandwiched metal and viscoelastic layer combinations which help to reduce vibration [1]. This paper present the studies carried out on modeling of free layer damping and constrained layer damping. Modeling of FLD and CLD was carried out using Ross Kerwin and Ungar (RKU) analysis discussed by Paul J.Macioce [2]. The loss factor is calculated by using Hermann Oberst and Alfred Schommer [3] approach with help of RKU equations. Parametric studies have also been carried out by varying constrained layer thickness to obtain optimal loss factor. The Oberst beam technique, Hermann Oberst and Alfred Schommer approach [3] have been used to measure the experimental damping.
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