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An example of acoustic pressure scattered from a rigid spherical surface shows how to solve acoustiv scattering problems with *FREQUENCY_DOMAIN_ACOUSTIC_BEM and *FREQUENCY_DOMAIN_ACOUSTIC_INCIDENT_WAVE. Example 8.12 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.
Keywords
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE_BINARY_D3PLOT
*DEFINE_CURVE
*DEFINE_PLANE
*ELEMENT_SHELL
*END
*FREQUENCY_DOMAIN_ACOUSTIC_BEM
*FREQUENCY_DOMAIN_ACOUSTIC_INCIDENT_WAVE
*KEYWORD
*MAT_RIGID
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*TITLE
*KEYWORD
*TITLE
Acoustic incident wave scattered from a sphere, and a reflecting plane.
*FREQUENCY_DOMAIN_ACOUSTIC_BEM
1.21 340.0 100.000 500.000 21 0.00 0.000 2.000E-05
1 1 0 0 4 1
3 1000 1.0000E-6 8
1
1 1 0 3 100
*DEFINE_CURVE
100 0 1.000000 1.000000 0.000 0.000 0
10.0 0.0
500.0 0.0
*FREQUENCY_DOMAIN_ACOUSTIC_INCIDENT_WAVE
2 1.0 4.0 0 0
*DEFINE_PLANE
1 1.0 0.0 -1.5 0.0 1.0 -1.5
0.0 0.0 -1.5
*SET_NODE_LIST
1 0.000 0.000 0.000 0.000
2356 2357 0 0 0 0 0 0
*PART
control volume
1 1 1 0 0 0 0 0
*SECTION_SHELL
1 2
0.010000 0.010000 0.010000 0.010000 0.000 0.000 0.000 0
*MAT_RIGID
1 7.83E+03 2.07E+11 0.300000 0.000 0.000 0.000
1.000000 7 7
0.000 0.000 0.000 0.000 0.000 0.000
*DATABASE_BINARY_D3PLOT
1.0000E-4 0 0 0 0
0
*CONTROL_TERMINATION
0.0010000 0 0.000 0.000 0.000
*CONTROL_TIMESTEP
0.000 0.900000 0 0.000 0.000 0 0 0
0.000 0 0 0.000
*ELEMENT_SHELL
*NODE
*END
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