| 姜琳,赵德有.浅海波导中椭球体声散射特性研究[J].,2008,(4):528-532 |
| 浅海波导中椭球体声散射特性研究 |
| Study of acoustic scattering from ellipsoids in shallow water wave-guide |
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| DOI：10.7511/dllgxb200804012 |
| 中文关键词: 浅海波导 声散射 边界元法 |
| 英文关键词: shallow water wave-guide acoustic scattering BEM |
| 基金项目:国家自然科学基金资助项目(54079060). |
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| 中文摘要: |
| 利用边界元法研究了三维海洋波导中声波与椭球散射体相互作用问题. 分析了海洋波导中声波与结构体相互作用的声散射特性，包括声压在水平断面和垂直断面的分布特点. 数值分析表明 浅海中椭球体的散射特性与自由场中明显不同，当椭球体按照一定比例变化时，其散射声压变化规律会近似于球体而声压幅值低于球体，这对于浅海中非规则目标散射特性的研究是非常重要的. 浅海波导对散射目标有显著的影响. |
| 英文摘要: |
| The interaction of acoustic wave with the scattering ellipsoids object in an ocean wave-guide was examined by using boundary element method (BEM). The experimental scattering characteristics of the acoustic wave by an obstacle were considered, including the horizontal and vertical propagation characteristics of the sound pressure for the ellipsoids. The results show that the scattering characteristics of ellipsoids in shallow water are different from those in infinite field. The scattering pressure made by ellipsoids is similar and lower than that made by sphere when the ellipsoids scale is appropriate. The result is very significant to research into the scattering characteristics of irregular objects in shallow water. The effect of scattering characteristics by an obstacle in shallow water wave-guide is prominent. |
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