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应用科学学报 ›› 1999, Vol. 17 ›› Issue (1): 108-113.

• 论文 • 上一篇    下一篇

固体声谐振子扰动的理论和实验研究

陈戈林, 郑华阁   

  1. 清华大学
  • 收稿日期:1997-08-20 修回日期:1998-01-06 出版日期:1999-03-31 发布日期:1999-03-31

A Theoretical and Experimental Study on the Perturbation of Solid Acoustic Resonator

CHEN GELIN, ZHENG HUAGE   

  1. Department of Electronic Engineering, Tsinghua University, Beijing 100084
  • Received:1997-08-20 Revised:1998-01-06 Online:1999-03-31 Published:1999-03-31

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摘要： 为进行快速无损检测(NDT),研究了固体声谐振子扰动和声学特征变化的关系.用有限元方法分析了存在和无缺陷样品的振动频率和振型,用数字信号处理技术,实验研究了样品中缺陷对声学特征的影响.实验和理论结果一致性很好,为用声学特征进行无损检测提供了理论和实验指导.

关键词: 声谐振腔, 扰动, 无损检测, 声学特征

Abstract: Using acoustic signature for nondestructive testing (NDT), relation between peturbation and acoustic signature of resonator is studed. The resonance frequencies and the field shapes of samples with or without crack are calculated by finite element method(FEM). Corresponding experiments are carried out for comparison and the results are conformed well. All of this are guide for NDT with acoustic signature inspection.

Key words: acoustic signature, perturbation, NDT, acoustic resonator