变截面闭管中非线性驻波场的实验研究

彭锋; 范瑜晛; 刘丹晓; 佟小朋; 尹铫; 刘克

变截面闭管中非线性驻波场的实验研究

中国科学院声学研究所, 北京, 100080

基金项目: 国家自然科学基金(No.10374099);国家自然科学基金(No.10574135)资助

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出版历程
- 收稿日期: 2007-04-29
- 修回日期: 2007-07-11
- 刊出日期: 2008-04-27

Experimental research on nonlinear standing waves field in a closed tube with varying cross-section

Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China

摘要

摘要: 当变截面闭管(CTVCS)的固有一阶反共振频率设计在接近共振基频的倍频处,共振基频激励下的二次谐波将受到极大抑制,以致在闭管末端可获得高声压、低谐波畸变的波形。相比等截面闭管,CTVCS内的二次谐波特性较为复杂,且在研究范围内,谐波随基波声压级的增长未出现明显的饱和趋势。
- 闭管 /
- 变截面 /
- 谐波 /
- 饱和
Abstract: For a closed tube with varying cross-sections(CTVCS),when the frequency of the first natural anti-resonance is designed to be near twice of that of the fundamental resonance,the second harmonic driven under the fundamental resonance frequency will be largely suppressed.Thus a high sound pressure waveform with low harmonic distortion at the end of the tube can be obtained.Compared with the closed tube of a constant cross-section,the properties of the second harmonic in CTVCS are rather complicated.This research shows the trend of the acoustic pressure level of harmonics growing with the fundamental component,but no discernible saturation.
- closed tube /
- varying cross-section /
- harmonic /
- saturation

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参考文献(1)

[1]

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