Suppression of the vibration and sound radiation of a sandwich plate via periodic design
Suppression of the vibration and sound radiation of a sandwich plate via periodic design
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通过周期性设计抑制夹层板的振动和声辐射
DOI：
10.1016/j.ijmecsci.2018.10.055
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发表时间：
2019-01-01
影响因子：
7.3
通讯作者：
Yu, Dianlong
中科院分区：
文献类型：
--
作者：
Song, Yubao;Feng, Leping;Yu, Dianlong
本文研究了通过使用周期设计来抑制夹层板的振动和声辐射。构造了周期性夹层板并计算了其色散关系。研究了周期性夹芯板的振动和声辐射特性。通过周期设计与裸夹层板的对比，分析了周期设计对振动和声辐射的影响。此外，为了更好地了解其声辐射特性，还比较了周期板和裸夹芯板的声辐射效率。此外，还分析了边界条件对周期性夹层板性能的影响。数值结果表明，振动和声辐射在周期性夹层板的阻带上得到了极大的抑制。在部分通带中也可以获得抑制。实验还表明，周期性设计可以成为降低声辐射效率的有效方法。在设计频率范围内，对振动和声音的抑制比仅增加板的质量所产生的抑制效果更大。
This paper investigates the suppression of vibration and sound radiation of a sandwich plate through the use of periodic design. A periodic sandwich plate is constructed and its dispersion relation is calculated. The vibration and sound radiation properties of the periodic sandwich plate are studied. Via the comparison of the periodic and bare sandwich plate, the effects of the periodic design on the vibration and sound radiation are analysed. Further, to know the sound radiation properties better, sound radiation efficiency of the periodic and bare sandwich plates is compared. In addition, the effects of the boundary conditions on the properties of the periodic sandwich plate are analysed. The numerical results demonstrate that the vibration and sound radiation are greatly suppressed over the stop band of the periodic sandwich plate. The suppression can also be obtained in part of pass bands. It is also shown that the periodic design can be an effective method for the reduction of the sound radiation efficiency. The suppression for the vibration and sound is greater than that caused by only increasing the mass of the plate in the designing frequency range.