| ELASTIC WAVES IN 3-D DISCRETE GRIDS |
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| 作者姓名： | Guan Huimin Liao Zhenpeng |
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| 作者单位： | Institute of Engineering Mechanics，Harbin.，150080 |
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| 摘 要： | Wave motion in finite element models presents some characteristics different from thoseof wave motion in continuum,which leads to the errors and other special phenomena in finite elementsimulation of wave motion.The wave propagation in a 3-D finite element model is studied by utilizingthe formal solution in the paper,and the corresponding dispersion relations are derived.Then the mainproperties of wave motion in 3-D grids such as dispersion,cut-off frequency and polarization drift arediscussed.Characteristics different from those of wave motion in 2—D grids are revealed.
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| 收稿时间： | 13 December 1994 |
ELASTIC WAVES IN 3-D DISCRETE GRIDS |
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| Guan Huimin Liao Zhenpeng.ELASTIC WAVES IN 3-D DISCRETE GRIDS[J].Acta Mechanica Solida Sinica,1995,8(4):283-293. |
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| Authors: | Guan Huimin Liao Zhenpeng |
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| Institution: | (1) Institute of Engineering Mechanics, 150080 Harbin |
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| Abstract: | Wave motion in finite element models presents some characteristics different from those of wave motion in continuum, which leads to the errors and other special phenomena in finite element simulation of wave motion. The wave propagation in a 3-D finite element model is studied by utilizing the formal solution in the paper, and the corresponding dispersion relations are derived. Then the main properties of wave motion in 3-D grids such as dispersion, cut-off frequency and polarization drift are discussed. Characteristics different from those of wave motion in 2-D grids are revealed. |
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| Keywords: | finite elements discrete grids 3-dimensional wave motion |
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