| 舰船螺旋桨空化低频辐射噪声时频域仿真 |
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| 引用本文： | 谢骏,笪良龙,胡均川. 舰船螺旋桨空化低频辐射噪声时频域仿真[J]. 声学技术, 2011, 0(4): 364-368 |
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| 作者姓名： | 谢骏 笪良龙 胡均川 |
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| 作者单位： | 海军潜艇学院水声数据中心; |
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| 基金项目： | 国防预研基金; 新世纪优秀人才支持计划NCET |
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| 摘 要： | 依据空泡动力学经典理论的分析结果,仿真出单个空泡体积变化时间波形及相应的声脉冲。将旋转桨叶充分空化情况下,一周期内引起的空泡群破灭过程的平均行为用单空泡仿真,并将不均匀尾流场空泡群噪声辐射近似描述为以叶片频倒数为周期间隔出现、幅度随机变化的单脉冲所构成的脉冲序列组成,并在声压脉冲波形上叠加适当的高斯白噪声。推导了宽带洛埃镜模型信道响应函数,分析其相应的谱特性,对深海近表面目标螺旋桨空化近场低频辐射噪声场进行了仿真,仿真结果与实测数据吻合较好。
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| 关 键 词： | 波形仿真 低频线谱 螺旋桨空化噪声 宽带信号 传播模型 |
| 收稿时间： | 2009-12-15 |
| 修稿时间： | 2010-03-27 |
Waveform simulation of low frequency line spectrum on nearfield radiated propeller cavitation noise |
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| XIE Jun,DA Liang-long and HU Jun-chuan. Waveform simulation of low frequency line spectrum on nearfield radiated propeller cavitation noise[J]. Technical Acoustics, 2011, 0(4): 364-368 |
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| Authors: | XIE Jun DA Liang-long HU Jun-chuan |
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| Affiliation: | XIE Jun,DA Liang-long,HU Jun-chuan(Naval Submarine Academy,Qingdao 266071,Shandong,China) |
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| Abstract: | The waveform of a single cavity volume change based on classical single cavitation dynamics model has been simulated.The instantaneous free-field acoustic pressure radiated from a pulsating monopole source can be derived by solving the acoustic wave equation in the case of a fluctuating mass source.If its density change is assumed to be negli-gible,the monopole pressure waveform is directly proportional to the second derivative of the cavity volume change.Based on the physical mechanism of low frequency lin... |
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| Keywords: | waveform simulation low frequency line spectrum propeller cavitation noise broadband signal propaga-tion model |
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