| 粘弹性介质中球形空腔嵌入层的共振特性研究 |
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| 引用本文： | 何世平,王家林,何琳.粘弹性介质中球形空腔嵌入层的共振特性研究[J].海军工程大学学报,2005,17(4):50-52. |
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| 作者姓名： | 何世平 王家林 何琳 |
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| 作者单位： | 1. 海军工程大学,振动与噪声研究所,湖北,武汉,430033
2. 海军装备部,北京,100841 |
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| 摘 要： | 潜艇吸声覆盖层在低频对抗主动声纳的探测是目前面临的一个重要技术难题.利用空腔共振时的吸收是解决低频吸声问题的一种有效途径.文中在假设入射球形纵波完全被腔壁反射的情形下,对球形空腔嵌入层的共振特性进行了理论分析.结果表明,在粘弹性介质中嵌入适当厚度的低剪切波速包覆层能有效地降低空腔共振的频率.
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| 关 键 词： | 共振 粘弹性 球形空腔 |
| 文章编号： | 1009-3486(2005)04-0050-03 |
| 修稿时间： | 2005年2月15日 |
Resonant characteristics of spherical cavity with a coating in viscoelastic material |
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| HE Shi-ping,WANG Jia-lin,HE Lin.Resonant characteristics of spherical cavity with a coating in viscoelastic material[J].Journal of Naval University of Engineering,2005,17(4):50-52. |
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| Authors: | HE Shi-ping WANG Jia-lin HE Lin |
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| Institution: | HE Shi-ping~1,WANG Jia-lin~2,HE Lin~1 |
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| Abstract: | To counteract the detection of low\|frequency active sonar by anechoic coating is an important technique problem. Sound absorption by cavity resonance is an effective solution to solve the low-frequency anechoic problem. The resonance behavior of a spherical cavity with a coating in an infinite viscoelastic medium is calculated on the assumption that an incident spherical dilatational wave is entirely reflected at the cavity walls. It is shown that the resonance frequency of cavity can be reduced effectively with a proper thickness of the coating. |
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| Keywords: | resonance viscoelasticity spherical cavity |
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