期刊
APPLIED PHYSICS LETTERS
卷 84, 期 26, 页码 5386-5388出版社
AMER INST PHYSICS
DOI: 10.1063/1.1767283
关键词
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A self-modulation mode of nonlinear acoustic vibrations of cracked defects has been analyzed and observed experimentally. Spectral patterns of the self-modulation are attributed to the sum-frequency type resonance in a multi-degree-of-freedom system and include a subharmonic spectrum as a particular case. Both the subharmonic and self-modulation modes demonstrate a high localization around the defect and provide opportunities for early detection and recognition of damaged areas. (C) 2004 American Institute of Physics.
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