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针对传统3层约束阻尼结构对外界振动能量的损耗受限问题,本文提出一种新型过渡约束阻尼结构;基于复刚度法推绎了该结构的损耗因子表达式,并与文献模型进行了对比验证.以悬臂阻尼梁为例,将该结构与传统3层阻尼结构损耗行为进行对比,分析结果表明,在结构振动时,增设过渡层,可使阻尼层的剪切变形增大,进而提高整个结构的损耗因子;同时探讨了过渡层的厚度、材料及铺设位置对结构损耗因子的影响,为今后优化工作打下了良好的基础.
Aiming at the problem that the traditional three-layer constrained damping structure has a limited loss to the external vibration energy, a new type of transitional restraining damping structure is proposed. Based on the complex stiffness method, the dissipation factor expression of the structure is deduced and compared with the literature model Taking the cantilever beam as an example, this structure is compared with that of the traditional three - layer damping structure. The results show that when the structure is vibrated, the addition of the transition layer can increase the shear deformation of the damping layer and further improve the whole structure The influence of the thickness of the transitional layer, the location of the material and the laying position on the structure loss factor was also discussed, laying a good foundation for future optimization.