BEM acoustics with acoustic transfer vector I — Welcome to LS-DYNA Examples

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This example shows how to set up an acoustic transfer vector (ATV) computation with *FREQUENCY_DOMAIN_ACOUSTIC_BEM_ATV and how to post-process with *DATABASE_FREQUENCY_BINARY_D3ATV. In the file domgeom.k the domain decomposition can be studied. Example 8.10 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.

Keywords

*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_FREQUENCY_BINARY_D3ATV
*ELEMENT_SHELL
*END
*FREQUENCY_DOMAIN_ACOUSTIC_BEM_ATV
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST

Reduced Input

*KEYWORD
*FREQUENCY_DOMAIN_ACOUSTIC_BEM_ATV
  1.21e-12  3.40e+05      100.      300.         3                 0.0   20.e-12
         1         1         0         0         4
         2      1000     1.E-6         8
                   1                             1
       288         1
*DATABASE_FREQUENCY_BINARY_D3ATV
         1
*CONTROL_TERMINATION
 3.0000E-2         0     0.000     0.000     0.000
*DATABASE_BINARY_D3PLOT
 2.0000E-3         0         0         0         0
         0
*ELEMENT_SHELL
*NODE
*SET_NODE_LIST
         1     0.000     0.000     0.000     0.000
    500001    500002 
*PART
OB-TRUNKLID-O
       288       136       136         0         0         0         0         0
*SECTION_SHELL
       136         2     0.000         0         1         0         0         1
  0.681000  0.681000  0.681000  0.681000     0.000     0.000     0.000         0
*MAT_ELASTIC
       136 7.8900E-9 2.1000E+5  0.300000
*END

Figures

image_001.png

image_002.png

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