build spring element with force-displacement curves

Altair Forum User

dear all

        I build a spring element with CBUSH element, define the force-displacement table with PBUSHT. But when I run the analysis, there was an error come out.

ERROR: 

 *** See next message about line 91 from file:
     C:/Users/A044045/Desktop/rubber/rubber.fem
  'PBUSH          1'
 
 *** ERROR # 1000 *** in the input data:
 Incorrect data in field # 3.

 

 

 And I define the CBUSH and PBUSHT cards as follows. How could I correct the error? Thanks!

 

CBUSH          2               1       2                               1

PBUSH          1
PBUSHT         1      KN       2       1       2 

Altair Forum User

Hi,

 

Provide the K value in the PBUSH card.

The K, B, GE, and M fields for PBUSHT are associated with the same entries on the PBUSH entry

Altair Forum User

Thank you very much!

you mean I have to write like the following?

PBUSH          1       K0.0     0.0    0.0    0.0   0.0   0.0 
PBUSHT         1      KN       2       1       2

 

Does that mean when use PBUSHT card, the K values in PBUSH will not effective?

Altair Forum User

For Nonlinear analysis KN is the type and other K values will be ignored.

Altair Forum User

Thank you very much!