嵌入式共固化复合材料阻尼结构阻尼性能的实验研究

Investigation on the Damping Characteristics of the Embedded Co-cured Composite Damping Structures

使用丁基橡胶作为黏弹性阻尼材料的主要原料,并使用模压法将该阻尼材料制成薄膜,再与环氧树脂玻璃布预浸料按固化曲线制得嵌入式共固化复合材料阻尼结构试件。然后测试其阻尼性能。结果表明嵌入较薄阻尼层会在构件刚度改变不大的情况下增大试样的阻尼。而嵌入阻尼层较厚时,对试件的刚度影响较大。随着阻尼层厚度的增加,构件阻尼的增加量逐渐降低。因此,以增加阻尼层厚度来提高构件阻尼的方法是不可取的。

In this paper, IIR rubber was used as the main component of visco-elastie damping material. Then, the damping layer of specimen was made of the damping material by mold molding. With epoxy glass fabric prepreg, according to the cure curves, some specimens of embedded co-cured composite structure were obtained. Finally, the damping characteristics of them were tested. Test results show that by adding a thin damping layer, the damping of structure is increased nearly without being stiffness changed. However, by adding a thick damping layer, the change of stiffness of the component is significant. With increases of the thickness of damping layer, the rate of the increases of damping gradually is reduced. Therefore, it is inappropriated to improve the damping characteristic of the structure by increasing the thickness of the damping layer of the embedded co-cured composite damping structures.