| 张阳,李桂娟,王振山,贾兵.改进的板块元遮挡算法[J].声学技术,2016,35(4):319~324 |
| 改进的板块元遮挡算法 |
| An improved plate element sheltering algorithm |
| 投稿时间：2015-11-09 修订日期：2016-02-12 |
| DOI：10.16300/j.cnki.1000-3630.2016.04.007 |
| 中文关键词: 板块元 遮挡处理 回波强度 |
| 英文关键词: planar elements method shelter dealing target strength |
| 基金项目: |
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| 中文摘要: |
| 潜艇目标具有复杂的内部结构，在对其进行回波预报时需要考虑不同部位之间的遮挡效应。选取某双层艇的内壳模型作为研究目标，首先利用三维建模软件对其精确建模，然后利用网格划分软件对目标建立两组尺寸不同的板块：大尺寸参考板块和精细板块，使用大尺寸参考板块对精细板块进行遮挡判断，可以通过减少遮挡判断次数，提高判断速度。通过将改进前后遮挡算法预报的目标强度和运算速度进行对比，验证了改进后算法的有效性和快速性，改进后的遮挡算法更具有工程应用价值。 |
| 英文摘要: |
| Submarine has complex outer and inner structures. For predicting echoes of submarine, the inter-shelters between different plate elements of the submarine must be taken into consideration. In this article, an exact model of Benchmark submarine is established by 3D model-building software, and then two groups of surface meshes of different sizes are built up as the plate elements of the submarine. The fine meshes are taken as the object meshes to be sheltered, and the large ones work as the sheltering meshes in this algorithm, rather than only the fine meshes are used in the existing sheltering algorithm. Due to reducing the number of total plate elements, the computing speed of the improved algorithm is increased. Comparing the results of predicted target strength and computing speed of the improved algorithm with that of the original one, the former has great advantages in computing speed and accuracy, and shows more potential in engineering application. |
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