| 平顶有肋柱壳低频散射特性研究 |
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| 引用本文： | 高华,安俊英,郑震宇,成刚,徐海亭. 平顶有肋柱壳低频散射特性研究[J]. 声学技术, 2007, 26(1): 36-39 |
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| 作者姓名： | 高华 安俊英 郑震宇 成刚 徐海亭 |
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| 作者单位： | 1. 中国科学院声学研究所北海研究站,青岛,266023
2. 杭州应用声学研究所,杭州,310012 |
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| 摘 要： | 应用边界元(BEM)和有限元(FEM)耦合方法对平顶有肋柱壳在声波轴向入射时的低频反向散射特性和振动位移状态进行了计算,对结果作了分析。并且实验测量了与计算相同的三个目标的低频反向散射特性,同计算结果相比较,结果基本一致,理论和实验结果均证明了肋骨存在对回波强度的影响,改变了原有振动系统的振动分布,使得散射谐振发生变化。
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| 关 键 词： | 低频 声散射 结构 |
| 文章编号： | 1000-3630（2007）-01-0036-04 |
| 收稿时间： | 2005-11-15 |
| 修稿时间： | 2005-11-152006-02-28 |
Low frequency scattering from cylindrical shell with rib |
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| GAO Hu,AN Jun-ying,ZHENG Zhen-yu,CHENG Gang and XU Hai-ting. Low frequency scattering from cylindrical shell with rib[J]. Technical Acoustics, 2007, 26(1): 36-39 |
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| Authors: | GAO Hu AN Jun-ying ZHENG Zhen-yu CHENG Gang XU Hai-ting |
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| Affiliation: | 1. Qingdao Acoustics Laboratory, Chinese Academy of Science, Qingdao 266023, China; 2. Hangzhou Applied Acoustic Research Institute, Hangzhou 310012, China |
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| Abstract: | Low frequency scattering from cylindrical shells are calculated using the coupled finite element(FEM)/ boundary element(BEM) method,and the sound backscattering measured over a ka range of 2-4.Effects of the rib on scattering echoes are analyzed.The experimental data approximately coincide with the numerical results.The result indicates that the object structure has important effect on the resonance and TS distribution over frequencies. |
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| Keywords: | low frequency acoustic scattering structure |
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