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利用大孔乙酸乙烯酯-三烯丙基异氰脲酸酯P(VAc-co-TAIC)大孔树脂颗粒和聚氨酯/环氧树脂(PU/EP)共混物弹性体基材,制备了厚度为2 mm的大孔树脂颗粒-弹性体水声高频吸声涂层。基于传递矩阵法,建立了声学模型,计算并分析了涂层的损耗因子、密度、杨氏模量与频率对吸声性能的影响,在消声水池中进行了涂层钢板吸声性能的测试。结果表明:纯弹性体涂层能够衰减声波,加入大孔树脂颗粒的涂层对声波的衰减效果优于未加大孔树脂颗粒的纯涂层;含大孔树脂和金属Fe粉的弹性体涂层以及大孔树脂颗粒分层梯度结构的弹性体涂层均表现出良好的水声衰减性能。
Using macroporous vinyl acetate-triallyl isocyanurate P (VAc-co-TAIC) macroporous resin particles and polyurethane / epoxy resin (PU / EP) blends, 2 mm macroporous resin particles - elastomer acoustic high-frequency sound absorption coating. Based on the transfer matrix method, the acoustic model was established, the influence of the loss factor, density, Young’s modulus and frequency of the coating on the sound absorption performance was calculated and tested. The sound absorption performance of the coated steel plate was tested in the muffling tank . The results show that the pure elastomer coating can attenuate the sound waves, and the coating with macroporous resin particles has better attenuation effect on acoustic waves than the pure coating without macroporous resin particles. The elastomer coated with macroporous resin and metal Fe powder Layer and macroporous resin particle layered gradient structure of the elastomer coating showed good acoustic attenuation performance.