| 静水压力下吸声覆盖层的声学性能分析 |
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| 引用本文： | 陶猛,卓琳凯.静水压力下吸声覆盖层的声学性能分析[J].上海交通大学学报,2011,45(9):1340-1344. |
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| 作者姓名： | 陶猛 卓琳凯 |
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| 作者单位： | (1.贵州大学 机械工程学院， 贵阳 550003； 2.上海交通大学 船舶海洋与建筑工程学院， 上海 200240) |
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| 基金项目： | 中国博士后基金资助项目(20100480587); 上海市博士后科研项目(10R21414500) |
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| 摘 要： | 基于圆柱型空腔吸声覆盖层的二维解析理论，在只考虑黏弹性圆柱管中最低阶轴对称波的条件下，推导出圆柱管的平均阻抗，将变截面圆柱型空腔腔体单元近似为截面呈阶梯变化的多个圆柱管组合，用传输线组合描述整个腔体单元，以简化吸声覆盖层声学性能参数的计算方法；利用有限元软件分析了静压条件下吸声覆盖层的腔体单元变形，结合简化计算方法分析了静压对吸声覆盖层声学性能的影响.结果表明，静压作用于吸声覆盖层引起了腔体单元厚度减小和空腔半径缩小，使得吸声覆盖层的低频吸声性能变差，且吸声峰值向高频方向偏移.
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| 关 键 词： | 静水压力 吸声覆盖层 简化计算 |
| 收稿时间： | 2010-06-14 |
Effect of Hydrostatic Pressure on Acoustic Performance of Sound Absorption Coating |
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| TAO Meng,ZHUO Lin-kai.Effect of Hydrostatic Pressure on Acoustic Performance of Sound Absorption Coating[J].Journal of Shanghai Jiaotong University,2011,45(9):1340-1344. |
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| Authors: | TAO Meng ZHUO Lin-kai |
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| Institution: | (1.School of Mechanical Engineering, Guizhou University, Guiyang 550003, China;2.School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | Based on the two-dimensional analytic model of sound absorption coating which contains cylindrical cavities,the effective impedance of the viscoelastic cylindrical tube was derived by considering the propagating characteristics of the lowest-order axisymmetric wave.The unit cell of sound absorption coating which contains a deformed cylindrical cavity could be approximated as the combination of several uniform cylindrical cavities,and the transmission line theory was applied to describe the unit cell so that... |
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| Keywords: | hydrostatic pressure sound absorption coating simplified calculation |
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