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| 论文题目 |
变截面闭管中非线性驻波场的实验研究 |
| 论文题目（英文） |
Experimental reserch on nonlinear standing waves field in a closed tube with varying cross-section |
| 作者 |
彭锋 |
| 发表年度 |
2008 |
| 卷 |
27 |
| 期 |
2 |
| 页码 |
156-162 |
| 期刊名称 |
声学技术 |
| 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。
关键词: 闭管; 变截面; 谐波; 饱和 |
| 摘要_英文 |
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.
Key words : closed tube; varying cross-section; harmonic; saturation |
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