基于LES和FEM/AML方法对潜标结构流噪声预报研究
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摘要
为了更合理地预报潜标结构在海洋环境下的流噪声情况,采用基于大涡模拟(LES)结合远场自动匹配层(FEM/AML)技术的声学混合方法,以某NACA翼型结构为研究对象对其进行水下声学分析。该方法得到了频域条件下标体结构在特征点处的声压级频率响应曲线与表面声压分布情况,并与FLUENT计算结果进行对比,脉动压力结果与表面声压分布吻合良好,证明了该方法预报水下结构流噪声的可靠性。研究结果表明,标体结构流噪声能量主要集中在低频段,集中区域位于该标体的中后段,辐射噪声沿标体结构上下表面成瓣状分布,标体中部辐射范围大,标体头部、尾部辐射范围较小。
In order to assess the flow noise of the submarine structure in the marine environment, a numerical simulation research using Large Eddy Simulation(LES) and Finite Element Method/Automatically Matched Layer(FEM/AML) method is conducted on a NACA airfoil model in this paper. The numerical simulation results which represent sound pressure level of characteristic point in frequency domain are in good agreement with the FLUENT data. The fluctuating pressure results and the surface sound of the subsurface buoy have a consistent distribution, which proves the accuracy of the method for predicting the flow noise of underwater structures.According to the research, the flow noise energy of low-medium frequency will concentrate on the rear part of subsurface buoy. The radiation noise of the target body in the sound field is distributed in a petal shape, and the radiation range is large in the middle of the target body, small in the tail part.
In order to assess the flow noise of the submarine structure in the marine environment, a numerical simulation research using Large Eddy Simulation(LES) and Finite Element Method/Automatically Matched Layer(FEM/AML) method is conducted on a NACA airfoil model in this paper. The numerical simulation results which represent sound pressure level of characteristic point in frequency domain are in good agreement with the FLUENT data. The fluctuating pressure results and the surface sound of the subsurface buoy have a consistent distribution, which proves the accuracy of the method for predicting the flow noise of underwater structures.According to the research, the flow noise energy of low-medium frequency will concentrate on the rear part of subsurface buoy. The radiation noise of the target body in the sound field is distributed in a petal shape, and the radiation range is large in the middle of the target body, small in the tail part.
引文
[1]王峥,洪明,刘城.基于FEM/BEM的浸水结构振动及声辐射特性国内研究综述[J].船舶力学,2014(11):1397-1414.
[2] Lighthill M J.On sound generated aerodynamically. I. General theory[J]. Proceedings of the Royal Society of London. Series A.Mathematical and Physical Sciences, 1952, 211(1107):564-587.
[3] Curle N. The influence of Solid Boundaries upon Aerodynamic Sound[C]//Proceedings of the Royal Society of London, Series A, 1955,231:505-514.
[4] Williams J E F,Hawkings D L.Sound generation by turbulence and surfaces in arbitrary motion[J]. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1969, 264(1151):321-342.
[5]卢云涛.全附体潜艇的流场和流噪声的数值研究[D].上海:上海交通大学, 2008.
[6]江文成.潜艇流噪声与流固耦合作用下流激噪声的数值模拟[D].上海:上海交通大学, 2013.
[7]杨琼方,王永生.非均匀进流条件下螺旋桨无空化噪声的预报与校验[C]//lms中国用户大会,2012.
[8]张冠军,朱翔,李天匀,等.水中双层加筋板结构的声振耦合特性[C]//中国造船工程学会船舶力学学术委员会第八次全体会议,2014.
[9]杨群,郑轶,王振,等.基于CFD标体结构流场及声学仿真分析[J].海洋技术学报, 2018(1):28-33.
[10]徐俊伟,吴亚锋,陈耿.气动噪声数值计算方法的比较与应用[J].噪声与振动控制, 2012, 32(4):6-10.
[11]盛胜我.有限元法在声学中的应用[J].声学技术, 1988(1):34-38.
[12] Bériot H, Tournour M. A review of stabilized FEM for Helmholtz equation[C]//Noise and Vibration:Emerging Methods, 2009.
[13] De Langhe, Koen, et al. Advanced simulation techniques for vehicle acoustic panel loading predictions, including FEM AML and Fast Multipole BEM(FMBEM)[C]//Internoise, 2011.
[14] Gregory N. Low-Speed aerodynamic characteristics of NACA 0012 aerofoil section, including the effects of upper-surface roughness simulating hoar frost[J]. Arc R&M, 1970,23(48):6697-6700.
[15]范国栋.水翼流致振动及声辐射特性研究[D].上海:上海交通大学, 2015.
[16]李增刚,詹福良.Virtual.Lab Acoustic声学仿真计算高级应用实例[M].北京:国防工业出版社, 2010.
[17]詹福良,徐俊伟.Virtual.Lab Acoustics声学仿真计算从入门到精通[M].西安:西北工业大学出版社, 2013.
[2] Lighthill M J.On sound generated aerodynamically. I. General theory[J]. Proceedings of the Royal Society of London. Series A.Mathematical and Physical Sciences, 1952, 211(1107):564-587.
[3] Curle N. The influence of Solid Boundaries upon Aerodynamic Sound[C]//Proceedings of the Royal Society of London, Series A, 1955,231:505-514.
[4] Williams J E F,Hawkings D L.Sound generation by turbulence and surfaces in arbitrary motion[J]. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1969, 264(1151):321-342.
[5]卢云涛.全附体潜艇的流场和流噪声的数值研究[D].上海:上海交通大学, 2008.
[6]江文成.潜艇流噪声与流固耦合作用下流激噪声的数值模拟[D].上海:上海交通大学, 2013.
[7]杨琼方,王永生.非均匀进流条件下螺旋桨无空化噪声的预报与校验[C]//lms中国用户大会,2012.
[8]张冠军,朱翔,李天匀,等.水中双层加筋板结构的声振耦合特性[C]//中国造船工程学会船舶力学学术委员会第八次全体会议,2014.
[9]杨群,郑轶,王振,等.基于CFD标体结构流场及声学仿真分析[J].海洋技术学报, 2018(1):28-33.
[10]徐俊伟,吴亚锋,陈耿.气动噪声数值计算方法的比较与应用[J].噪声与振动控制, 2012, 32(4):6-10.
[11]盛胜我.有限元法在声学中的应用[J].声学技术, 1988(1):34-38.
[12] Bériot H, Tournour M. A review of stabilized FEM for Helmholtz equation[C]//Noise and Vibration:Emerging Methods, 2009.
[13] De Langhe, Koen, et al. Advanced simulation techniques for vehicle acoustic panel loading predictions, including FEM AML and Fast Multipole BEM(FMBEM)[C]//Internoise, 2011.
[14] Gregory N. Low-Speed aerodynamic characteristics of NACA 0012 aerofoil section, including the effects of upper-surface roughness simulating hoar frost[J]. Arc R&M, 1970,23(48):6697-6700.
[15]范国栋.水翼流致振动及声辐射特性研究[D].上海:上海交通大学, 2015.
[16]李增刚,詹福良.Virtual.Lab Acoustic声学仿真计算高级应用实例[M].北京:国防工业出版社, 2010.
[17]詹福良,徐俊伟.Virtual.Lab Acoustics声学仿真计算从入门到精通[M].西安:西北工业大学出版社, 2013.