Vibrations of a cylindrical shell with partially constrained layer damping (CLD) treatment

This paper presents a mathematical model for a cylindrical shell with a partially constrained layer damping (CLD) treatment. A thin shell theory in conjunction with the Donnell–Mushtari–Vlasov assumptions is employed to yield the model. Employing the assumed-mode method, the discretized equations of motion in terms of shell’s transverse modal coordinates are derived. The effects of treatment length, of constraining layer (CL) thickness and stiffness, and of viscoelastic material core (VEM) thickness are then discussed. Numerical results show that thicker or stiffer CL warrants better damping. Thicker VEM does not always give better damping than thinner ones when CL exceeds a certain thickness.