Square Plate Out-of-Plane Vibration (thick shell mesh)

Natural frequencies of a solid simply supported plate are determined. Differences between S/R IPI thick shell (elform 2), assumed strain IPI thick shell (elform 3) and assumed strain RI thick shell (elform 5) can be studied. Example 13 from Introductory Manual for LS-DYNA Users by James M. Kennedy.

*KEYWORD
*TITLE
*CONTROL_IMPLICIT_EIGENVALUE
*CONTROL_IMPLICIT_GENERAL
*CONTROL_SHELL
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*ELEMENT_TSHELL
*NODE
*BOUNDARY_SPC_SET
*PART
*SECTION_TSHELL
*MAT_ELASTIC
*HOURGLASS
*SET_NODE_LIST
*END

*KEYWORD
*TITLE
Simply Supported Square Plate: Out-of-Plane Vibration (thick shell mesh)
*CONTROL_IMPLICIT_EIGENVALUE
        20       0.0         0       0.0         0       0.0         0       0.0
*CONTROL_IMPLICIT_GENERAL
         1       0.0
*CONTROL_SHELL
  20.00000         0         0         0         2         2         1
       0.0         1
*CONTROL_TERMINATION
  1.000000         0       0.0       0.0       0.0
*DATABASE_BINARY_D3PLOT
  1.000000
*ELEMENT_TSHELL
*NODE
*BOUNDARY_SPC_SET
*PART
         1         1         1         0         1
*SECTION_TSHELL
         1         2       0.0         5         0       0.0
*MAT_ELASTIC
         1  8000.0002.0000e+11  0.300000       0.0       0.0       0.0
*HOURGLASS
         1         4       0.1         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