Square Plate Out-of-Plane Vibration (solid mesh) — Welcome to LS-DYNA Examples

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Natural frequencies of a solid simply supported plate are determined. Differences between constant stress solid (elform 1), fully integrated S/R solid (elforms 2, -1 and -2) and fully integrated quadratic 8 node element with nodal rotations (elform 3) can be studied. Example 12 from Introductory Manual for LS-DYNA Users by James M. Kennedy.

Keywords

*BOUNDARY_SPC_SET
*CONTROL_IMPLICIT_EIGENVALUE
*CONTROL_IMPLICIT_GENERAL
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*ELEMENT_SOLID
*END
*HOURGLASS
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SOLID
*SET_NODE_LIST
*TITLE

Reduced Input

*KEYWORD
*TITLE
Simply Supported Square Plate: Out-of-Plane Vibration (solid mesh)
*CONTROL_IMPLICIT_EIGENVALUE
        10       0.0         0       0.0         0       0.0         0       0.0
*CONTROL_IMPLICIT_GENERAL
         1       0.0
*CONTROL_TERMINATION
  1.000000         0       0.0       0.0       0.0
*DATABASE_BINARY_D3PLOT
  1.000000
*ELEMENT_SOLID
*NODE
*BOUNDARY_SPC_SET
*PART
         1         1         1         0         1
*SECTION_SOLID
         1         1         1
*MAT_ELASTIC
         1  8000.0002.0000e+11  0.300000       0.0       0.0       0.0
*HOURGLASS
         1         6       1.0         0       0.0       0.0       0.0       0.0
*SET_NODE_LIST
         1       0.0       0.0       0.0       0.0
         1        37        73       109       145       181       217       253
       289       293       297       301       305       309       313       317
       321       285       249       213       177       141       105        69
        33        29        25        21        17        13         9         5
*END

Figures

figure_screw_0ms.png

figure_screw_60ms.png

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