Optimal damping layout in a shell structure using topology optimization

Experimental study on vibration and damping of curved panel treated with constrained viscoelastic layer

Vibration and damping analysis of thick sandwich cylindrical shells with a viscoelastic core under arbitrary boundary conditions

Study on vibration damping of composite sandwich cylindrical shell with pyramidal truss-like cores

Linear and nonlinear vibration analysis of sandwich cylindrical shell with constrained viscoelastic core layer

The task of providing lightly-damped shells with an enhanced modal damping is encountered in many applications. This paper explores the use of a standoff-layered viscoelastic damping treatment for cylindrical shells requiring a minimal distribution area and low added weight. It is shown that partial distribution of the treatment as damping patches can be more beneficial than using full coverage, provided the patches are located in regions of high modal strain energy, as determined from strain energy intensity distribution maps derived for the purpose. The analysis uses the finite element method, and a suitable curved shell element is formulated for the add-on damping treatment. Numerical studies show that the combination of partial coating and a standoff layer can offer a viable approach for achieving optimal damping in the presence of space and weight constraints.

M. G. Sainsbury

Papers

Vibration damping of cylindrical shells partially coated with a constrained viscoelastic treatment having a standoff layer

Vibration damping of cylindrical shells using strain-energy-based distribution of an add-on viscoelastic treatment