EXPERIMENTAL VERIFICATION OF CUMULATIVE SECOND-HARMONIC GENERATION BY SHEAR HORIZONTAL MODE PROPAGATION IN AN ELASTIC PLATE
EXPERIMENTAL VERIFICATION OF CUMULATIVE SECOND-HARMONIC GENERATION BY SHEAR HORIZONTAL MODE PROPAGATION IN AN ELASTIC PLATE
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DOI：
10.1142/s0217984909019739
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发表时间：
2009-05
影响因子：
1.9
通讯作者：
M. Deng
中科院分区：
文献类型：
--
作者：
M. Deng
Primary shear horizontal (SH) mode propagation and its second harmonic are generated and detected using wedge transducers on the surface of an elastic plate. In the far field region, the clear second-harmonic response can be observed at the frequency where the phase velocity of the primary SH mode equals that of the symmetric double-frequency Lamb mode. Based on the measured results, the ratio of the second-harmonic amplitude to the square of the primary SH mode amplitude is numerically evaluated for different propagation distances. It is experimentally verified that under some conditions the second harmonic of the primary SH mode propagation grows in amplitude with propagation distance.
