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	Numerical simulations of the guided elastic waves generated by laser-induced AS and ES in hollow cylinders
	Tang, L. G. ; Cheng, J. C. ; Tang LG(汤立国)
	2003
关键词	eigen-function guided elastic wave longitudinal flexural evaporation source ablation source
英文摘要	Numerical analyses are presented for the laser-generated guided elastic waves in hollow cylinders. The transient waveforms excited by the ablation source (AS) and the evaporation source (ES), due to the ablation and the evaporation of oil induced by impinging laser pulse, are calculated numerically by modeling different time-dependencies, i.e. the former is considered as Heaviside step function and the latter is assumed to be Dirac Delta function. Instead of using classical integral transform, the method of eigen-function expansion is employed, by which time-dependent displacement at the outer surface of hollow cylinders will be expressed by summation of longitudinal and flexural type modes. This formula is particularly suitable for analyses of generation efficiency of each guided elastic mode. And the waveform of total radial displacements were analyzed using a short-time Fourier transform (STFT).
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/60364]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Tang, L. G.,Cheng, J. C.,Tang LG. Numerical simulations of the guided elastic waves generated by laser-induced AS and ES in hollow cylinders[J],2003.
APA	Tang, L. G.,Cheng, J. C.,&汤立国.(2003).Numerical simulations of the guided elastic waves generated by laser-induced AS and ES in hollow cylinders..
MLA	Tang, L. G.,et al."Numerical simulations of the guided elastic waves generated by laser-induced AS and ES in hollow cylinders".(2003).

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