水下蜂窝空腔覆盖层的隔声性能分析

发布时间：2018-03-30 22:13

本文选题：蜂窝空腔　切入点：黏弹性覆盖层　出处：《声学技术》2017年05期

【摘要】：针对驻波管隔声量测试过程中,透射管末端反射波难以消除并对测试结果有一定影响的问题,利用LMS Virtual.lab有限元软件建立了驻波管隔声量测试的仿真模型。在模型中设置无反射边界条件,基于该模型分析了蜂窝空腔覆盖层的隔声性能,指出蜂窝空腔覆盖层的隔声特性是阻抗失配、波型转换、阻尼损耗等多种机理共同作用的结果,蜂窝结构的胞元壁厚、胞元夹角、黏弹性材料的杨氏模量等参数变化对隔声量的影响较为明显。消除了入射管端面和透射管端面的反射波,并通过与解析方法的计算结果对比验证了模型的正确性。
[Abstract]:In view of the problem that the reflected wave at the end of the transmission tube is difficult to eliminate and has a certain influence on the test results during the measurement of the sound insulation of the standing wave tube, A simulation model for sound insulation measurement of standing wave tube is established by using LMS Virtual.lab finite element software. The nonreflective boundary condition is set up in the model. Based on the model, the sound insulation performance of the honeycomb cavity covering layer is analyzed. It is pointed out that the sound insulation characteristics of honeycomb cavity cover layer are the result of various mechanisms, such as impedance mismatch, wave mode conversion, damping loss, etc. The cell wall thickness and cell angle of honeycomb structure are obtained. The influence of the parameters such as Young's modulus of viscoelastic material on the sound insulation is obvious. The reflection waves of the incident tube and the transmission tube are eliminated and the correctness of the model is verified by comparing the results with the analytical method.
【作者单位】：贵州大学现代制造技术教育部重点实验室;贵州大学机械工程学院;
【基金】：国家自然科学基金项目51365007;51765008 贵州省高层次创新型人才培养项目黔科合人才20164033
【分类号】：TB56

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