| 混沌理论在尾桨气动噪声信号分析中的应用 |
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| 引用本文： | 邵松,朱清华,张呈林,刘勇. 混沌理论在尾桨气动噪声信号分析中的应用[J]. 南京航空航天大学学报, 2006, 38(4): 427-432 |
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| 作者姓名： | 邵松 朱清华 张呈林 刘勇 |
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| 作者单位： | 南京航空航天大学直升机旋翼动力学国家级重点实验室,南京,210016;南京航空航天大学直升机旋翼动力学国家级重点实验室,南京,210016;南京航空航天大学直升机旋翼动力学国家级重点实验室,南京,210016;南京航空航天大学直升机旋翼动力学国家级重点实验室,南京,210016 |
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| 摘 要： | 研究剪刀式尾桨气动噪声的混沌特性，并应用混沌理论进行了直升机尾桨气动噪声信号分析。本文通过利用多频调制方法对尾桨噪声进行理论分析，得出相对声压值随剪刀变化的规律；然后将混沌运动的特征参数——关联维数用于剪刀式尾桨气动噪声信号的分析。分析结果表明剪刀式尾桨引起的气动噪声含有混沌特性，同时对比理论和试验结果表明剪刀尾桨构型的参数对气动噪声有明显的影响。
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| 关 键 词： | 气动噪声 混沌 关联维数 多频调制 剪刀式尾桨 |
| 文章编号： | 1005-2615(2006)04-0427-06 |
| 收稿时间： | 2005-07-18 |
| 修稿时间： | 2006-04-03 |
Aeroacoustic Noise Signal Analysis on Helicopter Scissors Tail Rotor by Chaos Theory |
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| Shao Song,Zhu Qinghua,Zhang Chenglin,Liu Yong. Aeroacoustic Noise Signal Analysis on Helicopter Scissors Tail Rotor by Chaos Theory[J]. Journal of Nanjing University of Aeronautics & Astronautics, 2006, 38(4): 427-432 |
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| Authors: | Shao Song Zhu Qinghua Zhang Chenglin Liu Yong |
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| Abstract: | Chaos characteristics of the aerodynamic noise are discussed and the aeroacoustic noise signals on helicopter scissors tail rotor is analyzed by the chaos theory. Through using multi-frequency theory to analyze the noise of the tail rotor, the relative sound pressure variable law is calculated according to the variation of scissors angle. A method is used to calculate the correlation dimension from a time series, and the correlation dimension is used to analyze the aeroacoustic noise signals of helicopter scissors tail rotor. Results show that chaos characteristics exist in the noise. Compared the theoretical results with experimental results, it proves that the scissors tail rotor parameters have a remarkable effect on the aeroacoustic noise. |
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| Keywords: | aeroacoustic noise chaos correlation dimension multi-frequecny modulation scissors tail rotor |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
