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This is a simplified engine model with base acceleration. It shows how to run equivalent radiated power (ERP) problems with *FREQUENCY_DOMAIN_SSD_ERP and how to postprocess with *DATABASE_FREQUENCY_BINARY_D3SSD. Example 5.4 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.

Keywords

*CONTROL_IMPLICIT_EIGENVALUE
*CONTROL_IMPLICIT_GENERAL
*CONTROL_IMPLICIT_SOLUTION
*DATABASE_FREQUENCY_BINARY_D3SSD
*DEFINE_CURVE
*END
*FREQUENCY_DOMAIN_SSD_ERP
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SOLID
*SET_NODE_LIST
*SET_SEGMENT
*TITLE

Reduced Input

*KEYWORD
*TITLE
A simplified engine model for SSD ERP computation.
*FREQUENCY_DOMAIN_SSD_ERP
         1        20     0.000     0.000         
  0.010000         0         0     0.000     0.000
                                       1 
      1.21      340.        1.
         1         2                        
                             1         3       200
*DATABASE_FREQUENCY_BINARY_D3SSD
         1
       10.     1000.       100
*CONTROL_IMPLICIT_GENERAL
         1     0.000         0         0         0         0         0         0
*CONTROL_IMPLICIT_EIGENVALUE
        20     0.000         0     0.000         0     0.000         0     0.000
         0         0         0         0
*CONTROL_IMPLICIT_SOLUTION
         1         0         0     0.000     0.000     0.000     0.000     0.000
         2         1         1         0         2         0
         0         0     0.000         1         2
*DEFINE_CURVE
*SET_NODE_LIST
*NODE
*PART
engine_solids                                                                   
   2000657   2000657   2000657
*SECTION_SOLID
   2000657        18         0
*MAT_ELASTIC
   2000657 7.8400E+3 1.070E+11  0.300000     0.000     0.000         0
*SET_SEGMENT
*END

Figures

image_004.png

image14.png

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