| 水下夹芯复合空腔结构声学特性计算方法研究 |
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| 引用本文： | 罗 忠,杨 坤.水下夹芯复合空腔结构声学特性计算方法研究[J].振动与冲击,2013,32(8):147-152. |
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| 作者姓名： | 罗 忠 杨 坤 |
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| 作者单位： | 1. 海军工程大学 科研部, 武汉 430033; 2. 海军工程大学 舰船工程系, 武汉 430033 |
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| 摘 要： | 建立了水下夹芯复合空腔结构入射声波模型，运用刚性管中声波传播特性和声固耦合边界条件，提出了一种声学特性有限元计算方法。通过与钢制和橡胶中间层解析解，以及单层夹芯复合结构和夹芯舵结构传递矩阵法、试验结果比较，验证了计算方法对均质层的有效性。通过与经典文献周期空腔覆盖层结构空气背衬和水背衬条件下计算结果进行比较，本文计算方法与经典方法吻合较好，同时兼顾了结构整体弯曲振动对声学性能的影响。通过分析周期阵列边界条件对夹芯复合空腔结构的声学特性影响，补充验证了本文计算方法的可行性。
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| 关 键 词： | 夹芯复合结构 空腔 声学性能 计算方法 |
| 收稿时间： | 2012-9-19 |
| 修稿时间： | 2012-11-28 |
Study on the Acoustic Property Computing Methodof Underwater Sandwich Structure with Cavum |
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| LUO Zhong,Yang Kun.Study on the Acoustic Property Computing Methodof Underwater Sandwich Structure with Cavum[J].Journal of Vibration and Shock,2013,32(8):147-152. |
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| Authors: | LUO Zhong Yang Kun |
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| Affiliation: | 1. Department of Researching, Naval Univ. of Engineering, Wuhan 430033, China;2. College of Naval Ship, Naval Univ. of Engineering, Wuhan 430033, China |
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| Abstract: | The incident sound wave model of underwater sandwich structure with cavum was built. A new computing method of acoustic property was present, with the study of transmission in rigid tube, and coupling of acoustic and structure. Through the contrast of acoustic properties with the midway layer of steel, rubber, the single sandwich, and sandwich rudder, the computing method was verified. The acoustic property of reference anechoic layer with cavum was researched. By this method, the acoustic property of influence of whole bent vibration was analyzed. The effect of boundary condition of period cavum could be ignored. |
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| Keywords: | sandwich structure cavum acoustic property computing method |
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