基于统计能量法研究肋骨对双层圆柱壳声辐射特性的影响

Effect of ribs on sound radiation characteristics of double cylindrical shell based on statistical energy analysis

    摘要
  • 摘要:
      目的  潜艇的主要结构形式是环肋圆柱壳，目前关于肋骨对圆柱壳声辐射特性影响的研究大多集中在中、低频，但是振动声学问题涉及到更宽的频率范围。
      方法  采用统计能量法研究宽频范围内肋骨对圆柱壳声辐射特性的影响。首先，分析圆柱壳增加肋骨后统计能量参数的变化；然后，研究耐压壳、外壳分别增加肋骨、改变肋骨间距、改变肋骨形状对圆柱壳声辐射特性的影响；最后，分析激振力作用在不同位置时，环肋圆柱壳声辐射特性的差异。
      结果  得到了肋骨影响下双层圆柱壳在500 Hz~100 kHz范围内的统计能量参数和辐射噪声变化规律。
      结论  研究结果对合理选用肋骨降低潜艇的振动与辐射噪声有一定参考作用。

     

    Abstract:
      Objectives  The main structure of a submarine is a ring-stiffened cylindrical shell. At present, most research into the effects of ribs on the acoustic radiation characteristics of cylindrical shells is concentrated on middle and low frequencies, but the acoustic vibration problems involve a wider frequency range.
      Methods  By using statistical energy analysis, we can study the effects of ribs on the acoustic radiation characteristics of a cylindrical shell in a wider frequency range. The changes in the SEA parameters induced by ribs are analyzed and the influence of different rib parameters on the radiation noise of a double cylindrical shell are studied. Then, the difference of ring-stiffened cylindrical shell caused by excitation force acting on different positions is studied.
      Results  The variation rule of SEA parameters and radiation noise in the range 500 Hz~100 kHz of double cylindrical shell influenced by ribs is obtained.
      Conclusions  The findings in this study can provide valuable references for reducing the radiation of submarines through the proper use of ribs.

     

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