Graded Finite Element Modeling of Constrained Layer Damping Treatments with Functionally Graded Viscoelastic Material

摘要

Passive constrained layer damping (PCLD) is a simple, powerful, and successful technique to solve structural vibration problems. The design of PCLD treatments is mainly subject to the physical and geometrical properties of the viscoelastic material. The use of functionally graded viscoelastic (FGV) material as a core layer in beams with PCLD treatments has been introduced by the authors in an earlier work. The main objective of the present work is to develop and formulate a finite element model for beams treated with FGV constrained layer damping. Natural frequencies and modal loss factors obtained by the finite element model are compared to those obtained by the assumed modes method from a previous work and results from both approaches are compared.