Home » Knowledge Base » NVH / Fatigue » BEM acoustics of a rectangular plate II
This is a second example of a recangular plate subjected to nodal force excitation. *FREQUENCY_DOMAIN_ACOUSTIC_BEM is used for running a vibro-acoustic problem with Rayleigh Method. Example 8.2 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.
Keywords
*CONTROL_ENERGY
*CONTROL_HOURGLASS
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DAMPING_FREQUENCY_RANGE
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_GLSTAT
*DEFINE_CURVE
*ELEMENT_SHELL
*END
*FREQUENCY_DOMAIN_ACOUSTIC_BEM
*KEYWORD
*LOAD_NODE_POINT
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*SET_PART_LIST
*TITLE
*KEYWORD
*TITLE
acoustic field generated by a vibrating plate, Rayleigh method
*FREQUENCY_DOMAIN_ACOUSTIC_BEM
1.210000 340.00000 28.000000 350.00000 162 0.001 0.000 2.0000E-5
1 1 0 0 4
0 1000 1.0000E-6 8
1
1 1 0 0
*CONTROL_ENERGY
2 0 0 0
*CONTROL_HOURGLASS
0 0.000
*CONTROL_TERMINATION
1.024000 0 0.000 0.000 0.000
*CONTROL_TIMESTEP
0.000 0.900000 0 0.000 -1.100E-6 0 0 0
0.000 0 0
*DATABASE_GLSTAT
1.0000E-4 0 0 1
*DATABASE_BINARY_D3PLOT
0.001000 0 0 0 0
0
*DATABASE_BINARY_D3THDT
0.001000 0 0 0 0
*LOAD_NODE_POINT
477 3 1 0.000 0 0 0 0
*PART
plate
1 1 1 0 0 0 0 0
*SECTION_SHELL
1 16 1.000000 3 0 0 0 0
0.001000 0.001000 0.001000 0.001000 0.000 0.000 0.000 0
*MAT_ELASTIC
1 7800.00002.1000E+11 0.300000 0.000 0.000 0
*DEFINE_CURVE
*SET_NODE_LIST
1 0.000 0.000 0.000 0.000
10000 0 0 0 0 0 0 0
*SET_PART_LIST
1 0.000 0.000 0.000 0.000
1 0 0 0 0 0 0 0
*DAMPING_FREQUENCY_RANGE
0.010000 30.000000 300.00000 0
*ELEMENT_SHELL
*NODE
*END
Download
