分析存在垫层时，垫层材料的级配对夯击能量的传递效果；
When there was cushion layer, the material gradation of cushion layer have effect on the tamp energy's transfer.
其次，从弹性垫层材料的力学特性角度出发，建立组合圆筒裱糊装配结构的力学模型。
Secondly, the structure's mechanical model that based on the elastic material mechanical characteristic and a certain enclasped state and enclasped thinking of multi-layers' shell is established.
石粉垫层材料来源广泛、价格低廉、施工工艺简单，是一种可推广应用的新型垫层材料。
Sources of material for powdery stone cushion are widespread. With their low costs and simple construction process they are new cushion material to be popularized.
应用推荐