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中文摘要：
建立浸水斜入射条件下三层黏接结构的声学模型,利用声阻抗法和弹簧模型导出浸水斜入射条件下三层黏接结构的透射系数表达式;并对浸水三层黏接结构进行数值计算,分析入射角度、黏接层厚度、钢板厚度、基体材料等参数对黏接结构透射特性的影响;同时,分析刚度系数变化对弱黏接结构透射系数的影响。为验证理论推导的正确性,对浸水钢-环氧树脂-钢三层黏接结构进行斜入射声学试验,试验结果与数值计算吻合较好。结果表明,对于浸水斜入射条件下三层黏接结构,入射角度等参数变化会使谐振频率点或透射系数峰值发生变化;当界面刚度系数很小,黏接结构为弱黏接结构时,透射系数存在＂多峰＂现象,并随着刚度系数的增大,首次出现＂多峰＂现象的频率值逐渐向高频方向漂移,当界面为完全黏接时,＂多峰＂现象消失。
英文摘要：
The acoustic model of three-layer bonding structure in water when oblique incidence is established, the acoustic impedance method and spring model are used to derive the representation of transmission coefficient of three-layer bonding structure when oblique incidence; and the numerical simulation is done to analyze the influence of the incidence angle, the adhesive thickness, the steel plate thickness, the substrate materials on the transmission coefficient; at the same time, the influence of the change in stiffness coefficient on the transmission coefficient of the weak bonding structure is studied. To verify the theoretical derivation, the experiment on the three-layer bonding structure（steel-epoxy-steel） in water when oblique incidence is done, the test results are in good agreement with the theoretical results. The results show that, the changes in incidence angle and other parameters will cause the change of resonant frequency points or the peak of transmission coefficient; the bonding structure is weak bonding structure when the stiffness coefficient is small, there is more than one peak of transmission coefficient, and the phenomenon of more than one peak is disappeared when good adhesion.
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