| 4 | ELASTIC WAVES IN 3-D DISCRETE GRIDS显示文摘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. | Guan, HM Liao, ZP | 1995 | Acta Mechanica Solida Sinica1995，8，4： | 0 |
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