Home » Knowledge Base » NVH / Fatigue » FRF of a plate with pressure
This example shows how to use *FREQUENCY_DOMAIN_FRF for a plate with pressure excitation. Example 4.5 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.
Keywords
*BOUNDARY_SPC_SET
*CONTROL_IMPLICIT_EIGENVALUE
*CONTROL_IMPLICIT_GENERAL
*CONTROL_IMPLICIT_NONLINEAR
*CONTROL_SHELL
*ELEMENT_SHELL
*END
*FREQUENCY_DOMAIN_FRF
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*TITLE
*KEYWORD
*TITLE
Benchmark example for FRF computation.
*FREQUENCY_DOMAIN_FRF
1 2 -3 4 0
0.01
1 1 3 1
1000.0 2000.0 1001 0 0 0
*BOUNDARY_SPC_SET
2 0 1 1 1
*CONTROL_IMPLICIT_EIGENVALUE
50 0.000 0 0.000 0 0.000 0 0.000
0 0 0 0
*CONTROL_IMPLICIT_GENERAL
1 1.000000 0 0 0 0 0 0
*CONTROL_IMPLICIT_NONLINEAR
1 0 0 0.000 0.000 0.000 0.000 0.000
0 0 0 0
0 0 0.000 1 2
*CONTROL_SHELL
20.000000 2 -1 0 2 2 1 0
1.000000 0 0 1 0 0 0 0
0 0 0
*PART
boxshell
1 1 1 0 0 0 0 0
*SECTION_SHELL
1 18 0.833000 3 3 0 0 0
0.002000 0.002000 0.002000 0.002000 0.000 0.000 0.000 0
*MAT_ELASTIC
1 7870.00002.0700E+11 0.292000 0.000 0.000 0
*SET_NODE_LIST
1 0.000 0.000 0.000 0.000
131 326 0 0 0 0 0 0
*SET_NODE_LIST
2 0.000 0.000 0.000 0.000
20 19 18 17 16 15 14 13
12 11 10 9 8 7 6 5
4 3 2 1 21 22 23 24
25 26 27 28 29 30 31 217
186 155 124 93 62 248 279 310
341 372 403 434 465 496 527 558
589 620 651 311 342 373 404 435
466 497 528 559 590 621 280 249
218 187 156 125 94 63 32 631
632 633 634 635 636 637 638 639
640 641 642 643 644 645 646 647
648 649 650 630 629 628 627 626
625 624 623 622 0 0 0 0
*ELEMENT_SHELL
*NODE
*END
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