敷设声学覆盖层可以吸收入射声波并降低辐射噪声，是声隐身的常用手段。采用耦合有限元方法分析敷设声学覆盖层的标准潜艇收发合置低频目标强度，包括单壳体模型和双壳体模型。首先，建立声-壳-结构耦合有限元模型，并验证了模型的准确性。其次，分析了单壳体标准潜艇的目标强度，结果表明敷设声学覆盖层可以改变目标强度曲线的起伏特性，在某些频率点或入射角度，敷设声学覆盖层时的目标强度甚至比未敷设时更大。此外统计表明，敷设声学覆盖层可以略微降低平均目标强度。最后，分析了双壳体标准潜艇的目标强度，结果表明外壳敷设声学覆盖层可以改变目标强度曲线的起伏特性并且略微降低平均目标强度，而在此基础上再增加内壳声学覆盖层则几乎没有效果。
Acoustic coating absorbs incident waves and reduces radiated noise, and is one the most commonly used methods for acoustic stealth. Therefore, the monostatic low-frequency target strength of benchmark submarine with acoustic coating is analyzed. First, the acoustic-shell-structure coupling finite element model is established and validated. Second, the target strength of single-hull benchmark submarine is analyzed. The results indicate that acoustic coating changes the peaks and notches of the target-strength curves. At some particular frequencies and incident angles, the target strength with acoustic coating is greater than that without acoustic coating. Statistically, acoustic coating reduces the average target strength slightly. Third, the target strength of double-hull benchmark submarine is analyzed. The acoustic coating in the external hull changes the peaks and notches of the target-strength curves and reduces the average target strength slightly. However, additional acoustic coating in the internal hull has little effect.
2019,41(7): 20-24 收稿日期：2018-07-21
DOI：10.3404/j.issn.1672-7649.2019.07.004
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,高级工程师,研究方向为声场计算与分析
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