| 充水有限长圆柱薄壳声散射:Ⅱ.实验 |
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| 引用本文： | 郑国垠,范军,汤渭霖.充水有限长圆柱薄壳声散射:Ⅱ.实验[J].声学学报,2010,35(1). |
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| 作者姓名： | 郑国垠 范军 汤渭霖 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院,上海,200240 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 从实验和理论上研究了充水有限长圆柱薄壳的声散射。实验采用指向性尖锐的宽带收发合置换能器,发射宽带调频信号和单频窄脉冲信号进行测量,所得结果分别在时域和频域上与理论计算结果相对比,证明其吻合程度很好。理论和实验的结果表明,内部充水圆柱壳在频域上增加了一组由内部流体负载引起的附加波的共振;而在时域上增加了一系列由于声波在壳体内来回反射产生的"回音廊"式回波。频率-角度图中"碗"形亮线出现分簇的原因解释为前几种模式"回音廊"式回波叠加的结果。
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| 关 键 词： | 散射声场 充水圆柱壳 换能器 回音廊 理论计算 共振频率 圆柱壳体 流体负载 声散射 有限长圆柱 |
Acoustic scattering from fluid-filled finite cylindrical shell in water: Ⅱ. experiment |
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| ZHENG Guoyin,FAN Jun,TANG Weilin.Acoustic scattering from fluid-filled finite cylindrical shell in water: Ⅱ. experiment[J].Acta Acustica,2010,35(1). |
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| Authors: | ZHENG Guoyin FAN Jun TANG Weilin |
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| Institution: | ZHENG Guoyin FAN Jun TANG Weilin (School of Naval Architecture,Ocean , Civil Engineering,Shanghai Jiao Tong University Shanghai 200240) |
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| Abstract: | Acoustic scattering from the submerged fluid-filled finite cylindrical shell insonified by an incident plane wave is studied experimentally and theoretically.A broadband transducer with the sharp directivity is used as both the transmitter and the receiver in the experiment.The broadband LFM signal and the single-frequency narrow pulse are used to measure the backscattering field of the cylindrical shell.The measured results have a good agreement with the theory's both in time and frequency domain.The theor... |
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