BeTSSi-Ⅱ标准潜艇模型具有较为完整的内部结构和接近真实潜艇的线型，因此其目标强度特性更接近真实潜艇。采用声-壳耦合有限元方法分析了收发合置BeTSSi-Ⅱ标准潜艇模型的低频目标强度，结果表明当频率大于100 Hz时，正横方向附近入射的目标强度大于其他方向入射的目标强度。进一步分析内部结构的影响，结果表明内部结构对正横方向附近入射的目标强度影响较小，而对首尾方向附近入射的目标强度影响较大。此外分析了BeTSSi-Ⅱ简化潜艇模型的目标强度，结果表明模型简化同样对正横方向入射的目标强度影响较小，而对首尾方向附近入射的目标强度影响较大。最后对比分析了BeTSSi-Ⅱ和BeTSSi-I两种潜艇模型，结果表明两者的差异主要为内部结构的差异，如果忽略内部结构，两者的差别不大。
BeTSSi-Ⅱ (Benchmark Target Strength Simulator Ⅱ) benchmark submarine contains relatively complete internal substructures and has an external shape similar to that of a real submarine, thus the target strength of BeTSSi-Ⅱ benchmark submarine approximates that of a real submarine. Then finite element method for acoustic-shell interaction is applied to the analysis of the monostatic target strength of BeTSSi-Ⅱ benchmark submarine. The results show that the target strength is remarkably greater when the incident angle is around the abeam direction above 100 Hz. Furthermore, the effects of internal substructures are analyzed, and it is shown that the target strength with the incidence around abeam direction is barely affected while that with the incidence around fore or astern direction is largely affected. In addition, two simplified BeTSSi-Ⅱ submarines are analyzed, and the results indicate that the simplifications barely affect the target strength with the incidence around abeam direction and largely affect that with the incidence around fore or astern direction. Finally, BeTSSi-I benchmark submarine is analyzed for comparison, and it is concluded that the internal substructures mainly contribute to the difference between BeTSSi-Ⅱ and BeTSSi-I benchmark submarines. If the internal substructures are neglected, the characteristics of target strength of BeTSSi-Ⅱ and BeTSSi-I benchmark submarines are quite similar.
2018,40(9): 68-74 收稿日期：2017-11-22
DOI：10.3404/j.issn.1672-7649.2018.09.013
分类号：TB566
基金项目：国家自然科学基金资助项目（11772304）
作者简介：冯雪磊(1989-),男,工程师,研究方向为声学换能器
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