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This is an example of a tube model under nodal force power spectral density excitation. *DATABASE_FREQUENCY_BINARY_D3PSD and *DATABASE_FREQUENCY_BINARY_D3RMS are used for post-processing of the results. Example 6.6 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_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_FREQUENCY_BINARY_D3PSD
*DATABASE_FREQUENCY_BINARY_D3RMS
*DATABASE_GLSTAT
*DATABASE_MATSUM
*DEFINE_CURVE
*ELEMENT_SHELL
*END
*FREQUENCY_DOMAIN_RANDOM_VIBRATION
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*TITLE
*KEYWORD
*TITLE
pipe simulation
*FREQUENCY_DOMAIN_RANDOM_VIBRATION
1 20
0.01
8 1
1537 0 3 100
*DATABASE_FREQUENCY_BINARY_D3PSD
1
10. 200. 191
*DATABASE_FREQUENCY_BINARY_D3RMS
1
*CONTROL_IMPLICIT_GENERAL
1 1.000000 2 1 2 0 0 1
*CONTROL_IMPLICIT_EIGENVALUE
20 0.000 0-1.000E+29 01.0000E+29 2 0.000
0 0 0 0 1
*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
*DEFINE_CURVE
100 0 0.000 1.0e+03 0.000 0.000 0
1.0000000 1.0000000
3000.0000000 1.0000000
*CONTROL_TERMINATION
1.000000 0 0.000 0.000 0.000
*DATABASE_GLSTAT
1.0000E-3 0 0 1
*DATABASE_MATSUM
1.0000E-3 0 0 1
*DATABASE_BINARY_D3PLOT
1.0000E-3 0 0 0 0
0
*DATABASE_BINARY_D3THDT
100.00000 0 0 0 0
*BOUNDARY_SPC_SET
1 0 1 1 1 1 1 1
*SET_NODE_LIST
1 0.000 0.000 0.000 0.000MECH
1000 1001 1102 1153 1204 1255 1306 1357
1408 1459 1510 1611 1662 1713 1764 1815
1866 1917 1968 2019 0 0 0 0
*PART
pipe
2 2 2 0 0 0 1 0
*SECTION_SHELL
2 18 0.00000 3 0 0 0 0
10.00000 10.00000 10.00000 10.00000 0.000 0.000 0.000 0
*MAT_ELASTIC
2 2.7300E-9 32408.000 0.300000
*ELEMENT_SHELL
*NODE
*END
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