过渡约束阻尼结构损耗因子的复刚度法

Complex Stiffness Method of Loss Factor for Constrained Damping Structure with Transition Layer

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.

To solve the limited vibration consumption of traditional constrained damping structure,a new type of constrained damping structure with transition layer was given.The loss factor of the structure was induced through the complex stiffness method,and was verified by the reference model.The comparison and contrast of loss behavior were made between the traditional constrained damping structure and the constrained damping structure with transition layer for a cantilever damping beams.The results show that the transition layer can transfer deformation to the damping layer and enlarge shear deformation of the damping layer,so as to dissipate more vibration energy and obtain a better loss factor when structure vibrates.At the same time,the effects of thickness,material and location of transition layer on loss factor of the structure were discussed,which could lay a good foundation for the further optimization.