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以玻璃纤维增强树脂作为约束层主要材料、丁腈橡胶为阻尼层、钢板为基板制备约束阻尼复合结构,运用动态黏弹谱仪和悬臂梁共振法,研究温度、约束层刚度和阻尼层结构对约束阻尼复合结构减振效果的影响。结果表明:自由阻尼复合板的最大阻尼范围落在阻尼层的玻璃化转变区;玻璃钢约束层能将复合结构的阻尼拓展至阻尼层的高弹态区域,增加阻尼层厚度可以提高约束复合板的阻尼性能;提高孔隙率同样有利于约束复合板阻尼性能提升;铝板约束层提升作用尤为显著,然而在海洋环境、干湿交替等强腐蚀场合中,铝板极易腐蚀而丧失约束功能,因此在这类特殊场合下耐腐蚀的玻璃钢具有优势。
Using glass fiber reinforced resin as the main material of constraining layer, nitrile rubber as damping layer and steel plate as substrate, the constrained damping composite structure was prepared. Dynamic viscoelastic spectroscopy and cantilever resonance method were used to study the influence of temperature, restraining layer stiffness and damping layer structure Effect of Constrained Damping Composite Structure on Vibration Reduction. The results show that the maximum damping range of the free-damping composite plate falls within the glass transition zone of the damping layer. The FRP constraining layer can extend the damping of the composite structure to the high-elastic region of the damping layer. Increasing the thickness of the damping layer can improve the damping capacity of the constrained composite plate Damping properties; improving the porosity is also conducive to restraining the damping performance of the composite board to enhance; especially the lifting effect of aluminum restraint layer, but in the marine environment, alternating wet and dry and other strong corrosion occasions, corrosion and loss of restraint, Class special occasions corrosion-resistant FRP has advantages.