船坞登陆舰声散射时频特征数值及试验研究
|
摘要
阐述了基于虚源法的板块元基本原理,以及目标强度和时域回波的计算方法。通过建立三维船坞登陆舰的网格模型,考虑水面反射以及船艉部分浸水的影响,计算得到了水平方位上的目标强度、由远场到近场回声强度的变化规律以及浅海水域下通过水雷正上方时回声强度的通过特性,并对这些结果进行的分析。通过开展运动水面舰船模型声散射湖上试验,获取了舰船模型时域回波特征,并与计算结果对比。研究结果表明,采用基于虚源法的板块元能够对船坞登陆舰的目标强度、回声强度以及时域回波结构给出比较准确的预报。研究结果将对提高船坞登陆舰声隐身特性,避开鱼雷和水雷等水中兵器的攻击提供一定的参考价值。
The image-source method based Planar Element Method(PEM) and the calculation methods of target strength and its time domain echo are described. By establishing a 3D meshing model of dock landing ship and taking surface reflection and the effect of stern partial flooding into consideration, the target strength of dock landing ship in the horizontal direction, the variation of the echo strength of dock landing ship from far field to near field and the variation of the echo strength of dock landing ship passing over a mine in the shallow water area are calculated and analyzed.Through the acoustic scattering experiment of moving warship model on lake, the time domain echo characteristics of the warship model are obtained and compared with the results of calculation. Research results show that the image-source method based PEM can accurately predict the target strength, the echo strength and echo structure of the dock landing ship, which could provide a reference for improving the stealth characteristics of dock landing ships and avoiding the attack of underwater weapons such as torpedo and mine.
The image-source method based Planar Element Method(PEM) and the calculation methods of target strength and its time domain echo are described. By establishing a 3D meshing model of dock landing ship and taking surface reflection and the effect of stern partial flooding into consideration, the target strength of dock landing ship in the horizontal direction, the variation of the echo strength of dock landing ship from far field to near field and the variation of the echo strength of dock landing ship passing over a mine in the shallow water area are calculated and analyzed.Through the acoustic scattering experiment of moving warship model on lake, the time domain echo characteristics of the warship model are obtained and compared with the results of calculation. Research results show that the image-source method based PEM can accurately predict the target strength, the echo strength and echo structure of the dock landing ship, which could provide a reference for improving the stealth characteristics of dock landing ships and avoiding the attack of underwater weapons such as torpedo and mine.
引文
[1]丁玉薇.被动声呐目标识别技术的现状与发展[J].声学技术,2004,23(4):253-257.DING Yuwei.Review on passive sonar target recognition[J].Technical Acoustics,2004,23(4):253-257.
[2]IHLENBURG F.Finite element analysis of acoustic scattering[M].Berlin,Heidelberg:Springer Science&Business Media,2006.
[3]MARBURG S,Nolte B.Computational acoustics of noise propagation in fluids:finite and boundary element methods[M].Berlin,Heidelberg:Springer,2008.
[4]WROBEL L C.The boundary element method,applications in thermo-fluids and acoustics[M].New Jersey:John Wiley&Sons,2002.
[5]范军,汤渭霖,卓琳凯.声呐目标回波特性预报的板块元方法[J].船舶力学,2012,16(1-2):171-180.FAN Jun,TANG Weilin,ZHUO Linkai.Planar elements methods for forecasting the echo characteristics from sonar targets[J].Journal of Ship Mechanics,2012,16(1-2):171-180.
[6]郑国垠,范军,汤渭霖.考虑遮挡和二次散射的修正板块元算法[J].声学学报,2011,36(4):377-383.ZHENG Guoyin,FAN Jun,TANG Weilin.A modified planar elements method considering occlusion and secondary scattering[J].Acta Acustica,2011,36(4):377-383.
[7]王新宁,范军.典型钢质海洋渔船目标强度及海面的影响[J].上海交通大学学报,2013,47(10):1515-1519.WANG Xinning,FAN Jun.Computation of target strength of the steel fish vessels and the influence of water surface[J].Journal of Shanghai Jiao Tong University,2013,47(10):1515-1519.
[8]王汝夯,李冰,魏强.基于板块元的水面舰船远场声目标强度预报方法[J].声学技术,2015,34(1):6-10.WANG Ruhang,LI Bing,WEI Qiang.A method for predicting far-field target strength of surface ship based on planar elements theory[J].Technical Acoustics,2015,34(1):6-10.
[9]PENG Z L,WANG B,FAN J.Simulation and experimental studies on acoustic scattering characteristics of surface targets[J].Applied Acoustics,2018,137:140-147.
[10]汤渭霖.用物理声学方法计算界面附近目标的回波[J].声学学报,1999,24(1):1-5.TANG Weilin.Calculation of acoustic scattering from object near an interface using physical acoustic method[J].Acta Acustica,1999,24(1):1-5.
[11]李建鲁,范军,汤渭霖.水下简单形状目标回声的近远场过渡特性[J].上海交通大学学报,2001,35(12):1846-1850.LI Jianlu,FAN Jun,TANG Weilin.Transition from near field to far field of echoes from simple shape targets in water[J].Journal of Shanghai Jiao Tong University,2001,35(12):1846-1850.
[2]IHLENBURG F.Finite element analysis of acoustic scattering[M].Berlin,Heidelberg:Springer Science&Business Media,2006.
[3]MARBURG S,Nolte B.Computational acoustics of noise propagation in fluids:finite and boundary element methods[M].Berlin,Heidelberg:Springer,2008.
[4]WROBEL L C.The boundary element method,applications in thermo-fluids and acoustics[M].New Jersey:John Wiley&Sons,2002.
[5]范军,汤渭霖,卓琳凯.声呐目标回波特性预报的板块元方法[J].船舶力学,2012,16(1-2):171-180.FAN Jun,TANG Weilin,ZHUO Linkai.Planar elements methods for forecasting the echo characteristics from sonar targets[J].Journal of Ship Mechanics,2012,16(1-2):171-180.
[6]郑国垠,范军,汤渭霖.考虑遮挡和二次散射的修正板块元算法[J].声学学报,2011,36(4):377-383.ZHENG Guoyin,FAN Jun,TANG Weilin.A modified planar elements method considering occlusion and secondary scattering[J].Acta Acustica,2011,36(4):377-383.
[7]王新宁,范军.典型钢质海洋渔船目标强度及海面的影响[J].上海交通大学学报,2013,47(10):1515-1519.WANG Xinning,FAN Jun.Computation of target strength of the steel fish vessels and the influence of water surface[J].Journal of Shanghai Jiao Tong University,2013,47(10):1515-1519.
[8]王汝夯,李冰,魏强.基于板块元的水面舰船远场声目标强度预报方法[J].声学技术,2015,34(1):6-10.WANG Ruhang,LI Bing,WEI Qiang.A method for predicting far-field target strength of surface ship based on planar elements theory[J].Technical Acoustics,2015,34(1):6-10.
[9]PENG Z L,WANG B,FAN J.Simulation and experimental studies on acoustic scattering characteristics of surface targets[J].Applied Acoustics,2018,137:140-147.
[10]汤渭霖.用物理声学方法计算界面附近目标的回波[J].声学学报,1999,24(1):1-5.TANG Weilin.Calculation of acoustic scattering from object near an interface using physical acoustic method[J].Acta Acustica,1999,24(1):1-5.
[11]李建鲁,范军,汤渭霖.水下简单形状目标回声的近远场过渡特性[J].上海交通大学学报,2001,35(12):1846-1850.LI Jianlu,FAN Jun,TANG Weilin.Transition from near field to far field of echoes from simple shape targets in water[J].Journal of Shanghai Jiao Tong University,2001,35(12):1846-1850.