超音速声强近似测量方法

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (17) : 111-116.

论文

超音速声强近似测量方法

王文璟1，张永斌2

作者信息 +

Approximate measurement method of supersonic sound intensity

WANG Wenjing1, ZHANG Yongbin2

Author information +

文章历史 +

摘要

通过测量超音速声强可以准确识别引起远场噪声辐射的声源，对于从根源上控制结构噪声具有重要意义。快照法和扫描法是目前测量超音速声强的常用方法。快照法需要大通道数的测试设备，导致测试成本过高；扫描法需要预知潜在声源的数目和与潜在声源相关的参考信号，但在实际中声源数目和参考信号难以获取，因此其应用受限。为解决上述问题，本文提出一种超音速声强近似测量方法。该方法可以实现扫描测量，减小所需测试设备通道数目，而且不需要实际声源数目和参考信号等先验知识。数值仿真和实验结果表明，所提方法可以有效识别引起远场声辐射的声源区域。
关键词：超音速声强；参考信号；声源识别

Abstract

Measuring supersonic acoustic intensity can help identify noise sources directly related to the far field acoustic radiation, which is very important for the control of structural borne-noise. The snap shot method and scanning method are the conventional choice to measure the supersonic acoustic intensity. However, the snap shot method requires a huge amount of transducers and recording devices, and the scanning method requires to know the number of potential noise sources and reference signals related to these sources in advance, which are difficult to be obtained in practice. To avoid the problems associated with above-mentioned measurement methods, a method for measuring the approximate supersonic acoustic intensity is proposed, which does not require any prior information about potential sources and reference signals, and can be implemented by sequentially scanning with a small amount of transducers and recording devices. The numerical and experimental results show that the proposed method can identify the sources responsible for far field acoustic radiation effectively.
Key words: supersonic acoustic intensity; reference signals; sound source identification

导出引用

王文璟1，张永斌2. 超音速声强近似测量方法[J]. 振动与冲击, 2022, 41(17): 111-116

WANG Wenjing1, ZHANG Yongbin2. Approximate measurement method of supersonic sound intensity[J]. Journal of Vibration and Shock, 2022, 41(17): 111-116

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