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为大幅度地提高复合材料结构动力学性能,首先提出了新型多层阻尼薄膜嵌入的共固化复合材料结构,并按照玻璃纤维/环氧(5231/EW180B)预浸料固化工艺曲线将其制成嵌入式中温共固化多层阻尼薄膜复合材料试件;然后,探索使用模态应变能有限元数值模拟法对该结构的动力学性能进行了研究;最后,将结果与模态分析实验数据进行对比,并获得了多层阻尼薄膜嵌入的共固化复合材料结构模态参数随阻尼层的厚度、数量、位置和分布的变化关系。结果表明:多层阻尼薄膜嵌入的复合材料结构能显著提高整体结构的一阶模态损耗因子。研究结果为轻质大阻尼复合材料结构设计理论和制作工艺的进一步研究奠定了基础。
In order to greatly improve the dynamic properties of the composite structure, a novel multi-layered damping film embedding composite structure was proposed and made according to the fiberglass / epoxy (5231 / EW180B) prepreg curing curve Embedded temperature-temperature co-curing multi-layer damping film composite specimens; and then explore the use of modal strain energy finite element numerical simulation of the structure of the kinetic performance of the study; Finally, the results and modal analysis of experimental data were compared , And obtained the relationship between the modal parameters of the multi-layer damping film embedded co-cured composites with the thickness, number, position and distribution of the damping layer. The results show that the first-order modal loss factor of the whole structure can be significantly improved by the composite structure embedded in the multi-layer damping film. The research results lay the foundation for the further research on the structural design theory and fabrication technology of the light-weight damping composite.