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
