With the damping materials laying on the steel plate, freedamping layer structures are prepared.
将所制备的阻尼材料敷设到钢板上，制备得到了自由阻尼层结构。
2
The basic types of composite structures with freedamping and constrained damping, so what works derived freedamping materials and constrained damping material.
复合结构的基本类型有自由阻尼和约束阻尼两种，因此派生出工程上所说的自由阻尼材料和约束阻尼材料。
3
The model was subjected to pulsation, vibration, free vibration and hammering tests in order to investigate its flexibility, frequency and damping characteristics.