冲击载荷下磁性层合梁的缓冲及衰减特性

利用在冲击载荷下磁性层合结构的层间发生滑移，进而引起刚度降低和摩擦耗能的特点，提出磁性层合缓冲及衰减的概念，研究在冲击载荷下磁性层合梁的缓冲和衰减性能。采用FEM方法分析了冲击载荷下磁性层合梁的冲击响应。通过与同样厚度的单层梁进行比较发现，在一定幅值范围的冲击载荷下，磁性层合粱不仅能使冲击响应最大峰值明显降低，而且能使冲击后的自由振动迅速衰减。

Buffering and attenuating characteristics of magnetic laminated beam under impact load

This paper presents the concepts of buffering and attenuating of magnetic laminated struc- ture on the basis of the features of decreasing rigidity and frictional loss when a relative sliding takes place in the magnetic laminated structure under impact load. The buffering and attenuating character- istics of magnetic laminated beam under impact load are studied. With FEM method, the impact re- sponse of the beam is investigated. Comparisons are made with single layer of the same thickness, and it is found that, without specific impact loads, the magnetic laminated beam can not only remarkably reduce the peak value of impact response but also result in the fast attenuation of free vibration after the impact.