Finite element analysis of damping the vibrations of laminated composites

There are several ways of decreasing the vibration energy of structures, such as diminishing the source energy, designing structures with desired eigen-frequencies and excitation frequencies, using materials that have damping properties, etc. Special damping layers made of various viscoelastic materials are widely applied in structures subjected to dynamic loading, especially those used in ship building and aerospace technology. A typical structure is that whose basic layer is covered with a damping layer and a thin constraining layer. Such classical sandwich structures have been widely investigated, especially with reference to the analysis of elastic vibrations.