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Yan Zhao, Zhonghua Shen, Jian Lu, Xiaowu Ni. Finite element simulation of leaky lamb wave at fluid-solid interfaces excited thermoelastically by pulsed laser[J]. Chinese Journal of Theoretical and Applied Mechanics, 2008, 40(1): 35-39. DOI: 10.6052/0459-1879-2008-1-2006-065
Citation: Yan Zhao, Zhonghua Shen, Jian Lu, Xiaowu Ni. Finite element simulation of leaky lamb wave at fluid-solid interfaces excited thermoelastically by pulsed laser[J]. Chinese Journal of Theoretical and Applied Mechanics, 2008, 40(1): 35-39. DOI: 10.6052/0459-1879-2008-1-2006-065

Finite element simulation of leaky lamb wave at fluid-solid interfaces excited thermoelastically by pulsed laser

  • Based on the variation principle, the corresponding finite element equationsfor the thermoelstic and heat conduction equations are obtained. The finiteelement equations for the fluid-solid interface waves propagated along thewater-aluminum, air-aluminum interfaces are solved by using the numericalmethod of integration, and then the transient waveforms excitedthermoelastically by a pulsed laser line source are obtained. The resultsshow that the leaky Lamb wave exists at the liquid-solid interface and alsoexists at air-solid interface; in reverse to the Lamb wave, the S_0 modeof leaky Lamb wave is antisymmetric, and the A_0 is symmetric; due tothe difference of the two kinds fluid-solid interfaces, the waveforms andamplitudes of the two leaky Lamb waves are different.
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