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四边简支含多孔材料双层板隔声特性

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陈亮,沈敏.四边简支含多孔材料双层板隔声特性[J].,2020,39(6):907-916
四边简支含多孔材料双层板隔声特性
Sound insulation characteristics of composite panel lined with porous materials under simply supported
投稿时间：2020-03-06修订日期：2020-10-30
中文摘要:
有限大含多孔材料和空气层复合板结构隔声特性的研究尚不充分。该文旨在研究四边简支边界条件下复合板结构隔声特性。首先基于流体饱和多孔弹性介质的声传播理论计算了声波在多孔介质中的传播波数；继而采用四边简支边界条件下板结构的模态函数，利用模态叠加法和伽辽金法推导了复合板结构隔声系数理论模型，并数值求解复合板隔声量。将理论模型得到的四边简支复合板隔声量与实验结果对比，验证了理论模型的正确性。最后，详细讨论了边界条件、板结构尺寸和多孔材料厚度等主要参数对隔声特性的影响。结果表明：四边简支复合结构隔声特性曲线上“谷值”出现得较少，并且简支复合板隔声特性的第一个“吻合频率”比固支支撑复合板更靠近低频，当频率超过3000 Hz以后，简支和固支边界条件复合板结构隔声特性趋于一致。
英文摘要:
The research on the sound insulation properties of the finite composite panel structure lined with porous materials and air layer is insufficient. The purpose of this paper is to study the sound insulation properties of the composite panel structure under simply supported. Firstly, the wave number of sound waves propagating in porous media is calculated based on the sound propagation theory of fluid-saturated porous elastic media. The modal function of the panel structure with simply supported conditions is adopted. The theoretical model of the sound insulation coefficients of composite panel structure under simply supported is derived by using modal superposition and Galerkin method and the sound insulation of the composite panel is numerically solved. The correctness of theoretical model is verified by comparing the sound insulation of composite panel under simply supported obtained by theoretical model with experimental results. Finally, the influence of the main parameters such as the boundary conditions and panel dimensions of the composite panel structure, thickness of porous materials on the sound insulation properties of the composite panel structure are discussed in detail. The results show that the "valley value" on the sound insulation properties curves is less under the simply supported boundary conditions and the first "matching frequency" of the sound insulation properties of the composite panel under simply supported is closer to the low frequency than that under clamped supported. When the frequency exceeds 3000 Hz, the sound insulation properties of the composite panel structure with simple and clamped supports tend to be consistent.
DOI：10.11684/j.issn.1000-310X.2020.06.014
中文关键词:声振特性弹性多孔材料简支边界条件夹层板隔声量
英文关键词:vibroacoustic characteristicsporoelastic materialsimply supported boundary conditionsandwich panelsound transmission loss
基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）
作者单位E-mail
陈亮武汉纺织大学13720248552@163.com
沈敏武汉纺织大学E-mail:min_shen18@163.com
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