噪声与振动控制

噪声与振动控制 ›› 2014, Vol. 34 ›› Issue (1): 12-15.DOI: 10.3969/j.issn.1006-1335.2014.01.003

• 2.振动理论与数值解法 • 上一篇    下一篇

梁模型三明治板的隔声预报

钱中昌 1，2，刘碧龙2，刘克 2   

  1. （ 1. 上海市计量测试技术研究院，  上海  201203； 2. 中国科学院  声学研究所，  北京  100190 ）
  • 收稿日期:2013-03-13 修回日期:2013-04-19 出版日期:2014-02-18 发布日期:2014-02-18
  • 通讯作者: 钱中昌
  • 基金资助:

    国家自然科学基金

Prediction of Sound Transmission Loss for Sandwich Panel by  Using Beam Model

  • Received:2013-03-13 Revised:2013-04-19 Online:2014-02-18 Published:2014-02-18
  • Contact: ZhongchangQian
  • Supported by:

    Project supported by the National Natural Science Foundation of China

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摘要：

提出一种针对有限大三明治蜂窝板的隔声预报方法。在一定条件下，三明治蜂窝板被看成是正交各向异性的，通过对蜂窝板正交方向上切割下来梁的简单测
试，可以得到三明治蜂窝板的等效刚度，结合正交各向异性板的振动方程，把板的振动展开成模态叠加的形式并求解，最终可以得到一块有限大三明治蜂窝板的理论隔声公式，理论预报结果与实验室测量结果对比良好。

关键词: 声学, 三明治板, 声传递损失, 阻尼, 有限大尺寸

Abstract:

An approach on the prediction of sound transmission loss for a finite sandwich panel with honeycomb core is described in the paper. The sand?wich panel is treated as orthotropic and the apparent bending stiffness in two principal directions is estimated by means of simple tests on beam elements cut from the sandwich panel. Utilizing orthotropic panel theory, together with the obtained bending stiffness in two directions, the sound transmission loss of simply-supported sandwich panel is predicted by modal expansion method. The predicted transmission loss is compared with measured data and the agreement is reasonable.

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