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首页> 外文期刊>Applied Acoustics >An analytical formulation for the underwater acoustic radiation of a cylindrical shell with an internal flexural floor based on the reciprocity theorem
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An analytical formulation for the underwater acoustic radiation of a cylindrical shell with an internal flexural floor based on the reciprocity theorem

机译：基于互易性定理的具有内部挠性底板的圆柱壳的水下声辐射的解析公式

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摘要

An analytical formulation is proposed in this work to evaluate the underwater acoustic radiation of an infinite cylindrical shell containing an internal flexural floor, based on the reciprocity theorem which is applicable to linear acoustic-vibration coupling systems. The essence of this method is to convert the acoustic radiation problem into the problem of acoustic scattering through the reciprocity theorem. On this basis, the acoustic-vibration coupling problem of the three-dimensional shell-floor structure is reduced to an equivalent two-dimensional plane problem. Then, the acoustic-vibration coupling solution of the shell-floor structure can be obtained directly by using the analytical energy method. The correctness of the present calculation method and the correspondingly developed calculation codes is verified through comparisons in the following two aspects. First, the structural dry modes analytically derived using the present method are compared and agree well with those calculated by the finite element method (FEM). Second, the underwater acoustic radiation of an infinite cylindrical shell (not containing internal floor) is evaluated using the present reciprocity-based method and compared with the standard analytical solution derived using the conventional approach. It turns out that the results obtained via these two methods totally agree with each other. At last, the effect of three parameters (i.e. the thickness of the flexural floor, the radius of the cylindrical shell, and the structural loss factor) on the underwater acoustic radiation of the shell-floor structure is presented through several examples. (C) 2019 Elsevier Ltd. All rights reserved.
机译：在这项工作中，提出了一种解析公式，以基于适用于线性声振动耦合系统的互易定理，评估包含内部挠性底板的无限圆柱壳的水下声辐射。该方法的本质是通过互易定理将声辐射问题转换为声散射问题。在此基础上，将三维壳层结构的声振动耦合问题简化为等效的二维平面问题。然后，可以通过使用解析能量法直接获得壳-地板结构的声-振动耦合解。通过在以下两个方面的比较，验证了本计算方法和相应开发的计算代码的正确性。首先，比较使用本方法分析得出的结构干模，并与通过有限元方法（FEM）计算的干模很好地吻合。其次，使用当前的基于互惠性的方法评估了无限圆柱壳（不包含内部底板）的水下声辐射，并将其与使用常规方法得出的标准分析解决方案进行了比较。事实证明，通过这两种方法获得的结果完全一致。最后，通过几个例子介绍了三个参数（即挠曲底板的厚度，圆柱壳的半径和结构损耗因子）对壳底板结构的水下声辐射的影响。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Applied Acoustics》 |2019年第11期|18-27|共10页
  • 作者

    Zou Ming-Song; Liu Shu-Xiao; Qi Li-Bo;

  • 作者单位

    China Ship Sci Res Ctr, Wuxi 214082, Jiangsu, Peoples R China|State Key Lab Deep Sea Manned Vehicles, Wuxi 214082, Jiangsu, Peoples R China|Natl Key Lab Ship Vibrat & Noise, Wuxi 214082, Jiangsu, Peoples R China;

    China Ship Sci Res Ctr, Wuxi 214082, Jiangsu, Peoples R China|State Key Lab Deep Sea Manned Vehicles, Wuxi 214082, Jiangsu, Peoples R China;

    China Ship Sci Res Ctr, Wuxi 214082, Jiangsu, Peoples R China|State Key Lab Deep Sea Manned Vehicles, Wuxi 214082, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Flexural floor-cylindrical shell; Underwater acoustic radiation; Analytical calculation; Reciprocity theorem;

    机译：挠曲底圆柱壳;水下声辐射;解析计算;互易定理;

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