A reanalysis of experimental high‐frequency spectra using periodic orbit theory
作者:
Dominique Delande,
Didier Sornette,
Richard Weaver,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1994)
卷期:
Volume 96,
issue 3
页码: 1873-1880
ISSN:0001-4966
年代: 1994
DOI:10.1121/1.410199
出版商: Acoustical Society of America
关键词: ALUMINIUM;EIGENFREQUENCY;IMPACT PHENOMENA;SOUND WAVES;FLUCTUATIONS;RAY TRAJECTORIES
数据来源: AIP
摘要:
The data, obtained [R. L. Weaver, J. Acoust. Soc. Am.85, 1001 (1989)] on high eigenfrequencies of small aluminum blocks, is reanalyzed using improved fitting procedures. If the results are quantitatively different from those published previously, they do not significantly modify the main conclusion that fluctuations of the spectrum on a small scale (involving a few mean eigenfrequency spacings) are well described by the model of Gaussian orthogonal ensemble (GOE) of random matrices. In addition, it is shown that, on a larger scale, the spectrum is correlated due to the existence of periodic classical ray trajectories. In other words, the large scale oscillations of the spectrum yield information on the size and shape of the aluminum blocks.
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