交替层合阻尼结构主控各向异性层参数对结构阻尼的影响

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

借助动态热机械分析仪(DMA Q800)对交替层合各向异性阻尼结构阻尼性能的影响权重最大层的各参数进行优化实验研究。探讨了该主控约束层的不同铺设角度、不同厚度和不同多子层替代对层合阻尼结构刚度、阻尼的温频特性的影响规律。实验结果表明,结构阻尼性能的影响权重最大层纤维铺设角度越接近90°(包括两个90°约束层层合)时,结构阻尼性能越好;结构不同,影响权重最大层较优厚度有所差异,当阻尼层总厚度与结构阻尼性能影响最大层厚度比约为10时,结构阻尼性能较好。

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 QS00）. 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.