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

Experimental study on parameter optimization of the maximal influencing factor layer of alternately laminated anisot ropic damped st ructures was carried out with dynamic mechanical analyzer (DMA Q800) . The influencesof different orientation angles , thicknesses and multilayer substitutes of the main cont rolled const rained layer ontemperature and f requency characteristics of the st ructural stiffness and damping were discussed. The experimentalresult s show that the st ructural damping characteristics are better while the orientation angle of the layer is close to90°(including the laminating of two 90°layers) ,and the optimal thickness is different in different st ructures , andthe st ructural damping characteristic is better while the ratio of the total thickness of the damping layers to the maincont rolled anisot ropic layer is about 10.