胡泊, 张均平. 潜艇艏端耐压舱壁构型对声目标强度的影响[J]. 中国舰船研究, 2016, 11(6): 22-27. DOI: 10.3969/j.issn.1673-3185.2016.06.004
引用本文: 胡泊, 张均平. 潜艇艏端耐压舱壁构型对声目标强度的影响[J]. 中国舰船研究, 2016, 11(6): 22-27. DOI: 10.3969/j.issn.1673-3185.2016.06.004
HU Bo, ZHANG Junping. Effect analysis for the shape of submarine bow pressure bulkhead upon the acoustic target strength[J]. Chinese Journal of Ship Research, 2016, 11(6): 22-27. DOI: 10.3969/j.issn.1673-3185.2016.06.004
Citation: HU Bo, ZHANG Junping. Effect analysis for the shape of submarine bow pressure bulkhead upon the acoustic target strength[J]. Chinese Journal of Ship Research, 2016, 11(6): 22-27. DOI: 10.3969/j.issn.1673-3185.2016.06.004

潜艇艏端耐压舱壁构型对声目标强度的影响

Effect analysis for the shape of submarine bow pressure bulkhead upon the acoustic target strength

  • 摘要: 潜艇艏部目标强度偏大,影响潜艇的声隐蔽性。由目标强度贡献比例曲线发现,艏端耐压舱壁是潜艇艏部目标强度的主要来源。潜艇艏端耐压舱壁主要有(椭)球面和平面2种形状,声波自艏端入射时,刚性平面的目标强度显著高于有一定曲率的刚性椭球面的目标强度。建立了一系列具有不同曲率的椭球形艏端耐压舱壁模型,基于板块元方法分析了艏端目标强度随舱壁曲率的变化关系,并对结果进行对数拟合,再利用BEM数值方法对耐压壳体艏部近场回波进行仿真,得到散射声压云图。计算结果表明:耐压壳艏端舱壁采取椭球面构形能够减弱散射声场的指向性,从而显著降低目标强度(>10 dB)。曲率大于一定程度时,艏端目标强度值趋于稳定。

     

    Abstract: High level of acoustic Target Strength(TS)from the bow of submarine forms great threat to submarines' acoustic stealth. According to the TS contribution curves,it's adduced that the bow pressure bulkheads are the main source of a submarine's bow target strength. There are two types of bow pressure bulkhead:ellipsoidal and planar bulkheads. And the TS of a rigid plane is much bigger than that of a ellipsoidal one. Based on Plane Element Method(PEM),the relationship of a submarine's bow TS with the bulkheads' curvature is analyzed,and logarithmic fitting is made by calculating the TS of a series of ellipsoidal pressure bulkhead with different curvatures. Then,the acoustic scattering pressure images near pressure bulkhead are obtained via indirect Boundary Element Method(BEM),and it suggests that the scattering pressure field of ellipsoidal surfaces have less directivity index compared to those of the planar bulkhead,which results in significant lower TS level(more than 10 dB). If the curvature is bigger than a certain value,the bow TS of an ellipsoidal pressure bulkhead tends to be stable.

     

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