Parameter effects of the main controlled anisotropic layer on structural damping of alternately laminated damped structures

Experimental study on parameter optimization of the maximal influencing factor layer of alternately laminated anisotropic damped structures was carried out with dynamic mechanical analyzer (DMA Q800). The influences of different orientation angles, thicknesses and multilayer substitutes of the main controlled constrained layer on temperature and frequency characteristics of the structural stiffness and damping were discussed. The experimental results show that the structural damping characteristics are better while the orientation angle of the layer is close to 90° (including the laminating of two 90° layers), and the optimal thickness is different in different structures, and the structural damping characteristic is better while the ratio of the total thickness of the damping layers to the main controlled anisotropic layer is about 10.