| 基于相位共轭方法识别结构表面法向振速 |
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| 引用本文： | 刘松,黎胜,赵德有.基于相位共轭方法识别结构表面法向振速[J].中国舰船研究,2011,6(4):19-24. |
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| 作者姓名： | 刘松 黎胜 赵德有 |
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| 作者单位： | 1. 大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024;大连理工大学运载工程与力学学部船舶工程学院,辽宁大连116024
2. 大连理工大学运载工程与力学学部船舶工程学院,辽宁大连,116024 |
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| 基金项目： | 国家自然科学基金(10972046) |
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| 摘 要： | 基于相位共轭方法对平板和水下圆柱壳辐射声场的识别进行了数值仿真计算,得到结构表面声压分布后,通过两种方法识别结构的法向振速:一种方法给出结构在声场中的位置和尺寸,基于声压梯度计算法向振速;另一种方法根据结构表面阻抗关系计算法向振速。数值计算结果表明:基于声压梯度计算法向振速时,能得到法向振速幅值的大致分布,该方法计算简单,适用于无法得到声源表面阻抗关系的情况;而引入结构表面阻抗关系则能得到更加准确的识别结果。
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| 关 键 词： | 相位共轭 法向振速 辐射声场识别 声压梯度 阻抗 |
Identification of the Surface Normal Velocity of a Structure Based on Phase Conjugation Method |
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| Liu Son,Li Sheng,Zhao De-you.Identification of the Surface Normal Velocity of a Structure Based on Phase Conjugation Method[J].Chinese Journal of Ship Research,2011,6(4):19-24. |
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| Authors: | Liu Son Li Sheng Zhao De-you |
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| Institution: | Liu Song1,2 Li Sheng1,2 Zhao De-you 2 1 State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China 2 School of Naval Architecture,Faculty of Vehicle Engineering and Mechanics,China |
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| Abstract: | The identification of the underwater radiated sound field of a plate and cylindrical shell were studied numerically by using the phase conjugation method.The normal velocity distribution of the structure was reconstructed by two different methods after obtaining the surface pressure distribution.One method was based on the pressure gradient and only required the dimension and the location of the structure in the sound field,the other was based on the surface impendence relationship of the structure vibratio... |
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| Keywords: | phase conjugation normal velocity identification pressure gradient impendence |
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