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This example shows a beam model with two layers of solids. *FREQUENCY_DOMAIN_FRF is used to define z-acceleration to the left end and z-direction nodal force output. With *DATABASE_NODAL_FORCE_GROUP resultant force output is defined. Example 4.4 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_SOLUTION
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_NODAL_FORCE_GROUP
*ELEMENT_SOLID
*END
*FREQUENCY_DOMAIN_FRF
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SOLID
*SET_NODE_LIST
*TITLE
*KEYWORD
*TITLE
FRF with resultant force
*FREQUENCY_DOMAIN_FRF
3 1 0 2000.0
0.01
1 1 3 3
1.0 1000. 1000
*DATABASE_NODAL_FORCE_GROUP
1 0
*CONTROL_IMPLICIT_GENERAL
1 1.000000 0 0 0 0 0 0
*CONTROL_IMPLICIT_SOLUTION
1 0 0 0.000 0.000 0.000 0.000 0.000
0 0 0 0 0 0
0 0 0.000 1 2
*CONTROL_IMPLICIT_EIGENVALUE
20 .0
1
*CONTROL_TERMINATION
1.000000 0 0.000 0.000 0.000
*DATABASE_BINARY_D3PLOT
1.000000 0 0 0 0
0
*SET_NODE_LIST
1 0.000 0.000 0.000 0.000
30 31 32 33 38 39 222 223
226 227 230 232 234 236 238 240
242 244
*SET_NODE_LIST
2 0.000 0.000 0.000 0.000
204 205 206 207 212 213 534 537
538 541 543 545 547 549 551 553
555 557
*SET_NODE_LIST
3
538 541 545 549 553 557
*BOUNDARY_SPC_SET
1 0 1 1 1 1 1 1
*MAT_ELASTIC
1 7.8000E-9 2.0700E+5 0.280000 0.000 0.000 0
*PART
beam
2 1 1 0 0 0 0 0
*SECTION_SOLID
1 18
*ELEMENT_SOLID
*NODE
*END
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