| 梁晶晶,于洋,陈文剑,胡思为,王珲,王艺哲.快速预估水下圆形角反射体散射声场的修正声束弹跳方法[J].声学技术,2017,36(4):303~308 |
| 快速预估水下圆形角反射体散射声场的修正声束弹跳方法 |
| A modified shooting and bouncing beams method for fast calculating the acoustic scattering field of circular trihedral corner reflector |
| 投稿时间：2016-11-07 修订日期：2017-02-10 |
| DOI：10.16300/j.cnki.1000-3630.2017.04.002 |
| 中文关键词: 圆形角反射体 多次散射 声束弹跳方法 物理声学方法 几何声学 |
| 英文关键词: circular trihedral corner reflector multiple scattering shooting and bouncing beams method physical acoustic method geometrical acoustics |
| 基金项目:国家自然科学基金青年科学基金项目（11404077） |
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| 中文摘要: |
| 针对水下圆形角反射体散射声场计算速度问题，在声束弹跳法基础上，提出了一种快速预估散射声场的修正声束弹跳法。对组成圆形三面角反射体的弧形边缘进行离散化，相邻离散点与角反射体顶点构成板块元，并与声源点构成入射声束，利用几何声学计算每条声束在角反射体反射面上的反射，同时得到反射面上每条声束"照射"后再次构成的板块元，用物理声学方法计算所有板块元的散射声场，叠加求和得到整个角反射的散射声场。通过与原始的声束弹跳法计算结果的对比，两者计算结果一致，修正声束弹跳法降低了计算量。 |
| 英文摘要: |
| A modified shooting and bouncing beam method is proposed in this paper, which can calculate the acoustic scattering field of circular trihedral corner reflector quickly. A lot of discrete points are selected on the arc edge of circular trihedral corner reflector. The adjacent two discrete points plus the vertex of corner reflector form a planar element, and the planar element together with the sound source position form an incident sound beam. The reflection of each sound beam is calculated based on geometrical acoustic method; at the same time, the new planar element forms after getting the "radiation" of each sound beam on the reflecting surface. The acoustic scattering field of every planar element is calculated based on physical acoustic method. The superposition of all planar elements' scattering fields is the corner reflector's scattering field. The comparison between the results of the original shooting and bouncing beam method and the modified one shows that the two calculations are consistent. However, the modified shooting and bouncing beam method decreases the computational complexity greatly. |
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