文章摘要
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[J].声学技术,2008,(2):156~162
变截面闭管中非线性驻波场的实验研究
Experimental research on nonlinear standing waves field in a closed tube with varying cross-section
投稿时间:2007-04-30  修订日期:2007-07-12
DOI:
中文关键词: 闭管  变截面  谐波  饱和
英文关键词: closed tube  varying cross-section  harmonic  saturation
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
作者单位
彭锋 中国科学院声学研究所, 北京, 100080 
范瑜晛 中国科学院声学研究所, 北京, 100080 
刘丹晓 中国科学院声学研究所, 北京, 100080 
佟小朋 中国科学院声学研究所, 北京, 100080 
尹铫 中国科学院声学研究所, 北京, 100080 
刘克 中国科学院声学研究所, 北京, 100080 
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中文摘要:
      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。
英文摘要:
      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.
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