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相位共轭法进行水下圆柱壳辐射声场的识别研究

DOI: doi:10.3969/j.issn.1006-7043.2011.08.001

Keywords: 相位共轭方法, 水下圆柱壳, 辐射声场, 识别

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Abstract:

为了研究水下工程结构辐射声场的识别问题,基于相位共轭方法采用离散阵元对水下有限长圆柱壳的辐射声场识别进行了数值仿真计算.采用不同的阵列形式分别在近场和远场对圆柱壳表面声压、法向速度、辐射声功率和声强进行了识别及重构误差分析,并讨论了激励频率变化对重构结果的影响.数值计算结果表明:只有在近场采用圆柱形阵列形式并基于声压梯度测量,使用偶极子源才能得到最好的声场重构结果;采用相位共轭方法可以较好地识别结构的表面声压、法向速度、辐射声功率和声强等;在远场使用相位共轭方法仅能够识别出圆柱壳表面声压最大值的位置;激励频率发生变化时该方法仍能得到较精确的重构结果.相位共轭方法具有使用测点少,可自然使用局部重建方法,并且不存在解不稳定问题等优点,具有很好的应用前景.

References

[1]  WILIAMS E G, HOUSTON B H. Fast Fourier transform and singular value decomposition formulations for patch nearfield acoustical holography[J]. J Acoust Soc Am, 2003, 114(3): 1322-1333.
[2]  MAYNARD J D, WILLIAMS E G, LEE Y. Nearfield ?acoustic? holography (NAH): I. theory of generalized holography and the development of NAH [J]. J Acoust Soc Am, 1985, 78(4):1395-1413.?
[3]  WILLIAMS E G, DARDY H D. Generalized nearfield acoustical holography for cylindrical geometry: theory and experiment[J]. J Acoust Soc Am, 1987, 81(2): 389-407.?
[4]  LEROSEY G, DE ROSNY J, TOURIN A,FINK M.Focusing beyond the diffraction limit with far-field time reversal[J]. Science, 2007,315:1120-1120.?
[5]  CONTI S G,ROUX P, KUPERMAN W A. Near-field time-reversal amplification[J].Journal of the Acoustical Society of America, 2007,121(6):3602-3606.?
[6]  DE ROSNY,FINK M. Overcoming the diffraction limit in wave physical using a time-reversal mirror and a novel acoustic sink[J].Physical Review Letters, 2002,89(12):?1-4.??
[7]  DE ROSNY J,FINK M.Focusing properties of near-field time reversal[J]. Physical Review A, 2007,76:1-4.?
[8]  EVERSTINE G C, HENDERSON F M. Coupled finite element/boundary element approach for fluid-structure interaction[J]. J Acoust Soc Am, 1990, 87(5): 1938-1947.?
[9]  黎胜.水下结构声辐射和声传输的数值分析及主动控制模拟研究[D].大连:大连理工大学, 2001:37-71. ?LI Sheng.Numerical analysis and active control simulation of underwater structural acoustic radiation and transmission[D].Dalian:Dalian University of Technology,2001:67-70.?
[10]  JACKSON D R,DOWLING D R. Phase conjugation in underwater acoustics[J]. Journal of the Acoustical Society of America, 1991,89(1):171-181.?
[11]  何祚镛,何元安,王曼.近场声全息技术应用有关物理问题研究[J].声学学报, 2007,32(2):137-143.? HE Zuoyong,HE Yuanan,WANG Man.The investigation on the physical acoustics problems of the NAH technigue and its application[J].Acta Acustica,2007,32(2):137-143.?

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