敷设声学覆盖层的标准潜艇低频目标强度分析
|
摘要
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.
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.
引文
[1]朱蓓丽,黄修长.潜艇隐身关键技术--声学覆盖层的设计[M].上海:上海交通大学出版社,2012.
[2]俞孟萨,林立.船舶水下噪声研究三十年的基本进展及若干前沿基础问题[J].船舶力学,2017,21(2):244-248.YU Meng-sa,LIN Li.Some progresses of underwater noise of ships in the recent thirty years and several new basic problems[J].Journal of Ship Mechanics,2017,21(2):244-248.
[3]赵敏兰,朱蓓丽.用等效参数法研究含球形空腔弹性体的吸声性能[J].噪声与振动控制,1996,16(5):11-14.ZHAO Min-lan,ZHU Bei-li.Acoustic absorbing properties analysis of elastomer with spherical bores using equivalent parametric method[J].Noise and Vibration Control,1996,16(5):11-14.
[4]陶猛,赵阳.基于反射系数测量的黏弹性材料动态力学参数反演方法[J].振动与冲击,2014,33(17):85-89.TAO Meng,ZHAO Yang.Inversion analysis of viscoelastic material dynamic parameters based on reflection coefficient measurement[J].Journal of Vibration and Shock,2014,33(17):85-89.
[5]龚家元,安俊英,马力,等.覆黏弹层加肋双层板的声反射[J].声学学报,2013,38(3):326-337.GONG Jia-yuan,AN Jun-ying,MA Li,et al.Acoustic reflection of rib-stiffened double plates coated with a viscoelastic layer[J].,2013,38(3):326-337.
[6]张阳,李桂娟,王振山,等.改进的板块元遮挡算法[J].声学技术,2016,35(4):319-324.ZHANG Yang,LI Gui-juan,WANG Zhen-shan,et al.An improved plate element sheltering algorithm[J].Technical Acoustics,2016,35(4):319-324.
[7]MARBURG S.Six boundary elements per wavelength:is that enough?[J].J.Comput.Acoust,2002,10(1):25-51.
[8]GILROY L,DE JONG C,NOLTE B,SCH?FER I.BeTSSi IIBenchmark Target Strength Simulation[C]//Forum Acusticum.Krakow,Poland,2014.
[9]金国梁,尹剑飞,温激鸿,等.基于等效参数反演的敷设声学覆盖层的水下圆柱壳体声散射研究[J].物理学报,2016,65(1):014305.JIN Guo-liang,YIN Jian-fei,WEN Ji-hong,et al.Investigation of underwater sound scattering on a cylindrical shell coated with anechoic coatings by the finite element method based on an equivalent parameter inversion[J].Acta Phys.Sin.,2016,65(1):014305.
[10]MITRI F G.Calculation of the acoustic radiation force on coated spherical shells in progressive and standing plane waves[J].Ultrasonics,2006,44(3):244-258.
[2]俞孟萨,林立.船舶水下噪声研究三十年的基本进展及若干前沿基础问题[J].船舶力学,2017,21(2):244-248.YU Meng-sa,LIN Li.Some progresses of underwater noise of ships in the recent thirty years and several new basic problems[J].Journal of Ship Mechanics,2017,21(2):244-248.
[3]赵敏兰,朱蓓丽.用等效参数法研究含球形空腔弹性体的吸声性能[J].噪声与振动控制,1996,16(5):11-14.ZHAO Min-lan,ZHU Bei-li.Acoustic absorbing properties analysis of elastomer with spherical bores using equivalent parametric method[J].Noise and Vibration Control,1996,16(5):11-14.
[4]陶猛,赵阳.基于反射系数测量的黏弹性材料动态力学参数反演方法[J].振动与冲击,2014,33(17):85-89.TAO Meng,ZHAO Yang.Inversion analysis of viscoelastic material dynamic parameters based on reflection coefficient measurement[J].Journal of Vibration and Shock,2014,33(17):85-89.
[5]龚家元,安俊英,马力,等.覆黏弹层加肋双层板的声反射[J].声学学报,2013,38(3):326-337.GONG Jia-yuan,AN Jun-ying,MA Li,et al.Acoustic reflection of rib-stiffened double plates coated with a viscoelastic layer[J].,2013,38(3):326-337.
[6]张阳,李桂娟,王振山,等.改进的板块元遮挡算法[J].声学技术,2016,35(4):319-324.ZHANG Yang,LI Gui-juan,WANG Zhen-shan,et al.An improved plate element sheltering algorithm[J].Technical Acoustics,2016,35(4):319-324.
[7]MARBURG S.Six boundary elements per wavelength:is that enough?[J].J.Comput.Acoust,2002,10(1):25-51.
[8]GILROY L,DE JONG C,NOLTE B,SCH?FER I.BeTSSi IIBenchmark Target Strength Simulation[C]//Forum Acusticum.Krakow,Poland,2014.
[9]金国梁,尹剑飞,温激鸿,等.基于等效参数反演的敷设声学覆盖层的水下圆柱壳体声散射研究[J].物理学报,2016,65(1):014305.JIN Guo-liang,YIN Jian-fei,WEN Ji-hong,et al.Investigation of underwater sound scattering on a cylindrical shell coated with anechoic coatings by the finite element method based on an equivalent parameter inversion[J].Acta Phys.Sin.,2016,65(1):014305.
[10]MITRI F G.Calculation of the acoustic radiation force on coated spherical shells in progressive and standing plane waves[J].Ultrasonics,2006,44(3):244-258.