Load Steps

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

I am creating MSC Nastran input deck using HyperMesh. I have the model where I want to apply multiple loads in steps. 

Step-1 Bolt Preload

Step-2 External Force on model holding the preload applied in Step1

Step-3 No load at all but bolt preload

If I create different loadsteps from Utility, it seems they are going under different subcases, and in such scenario the loads would not be dependent. Each subcase would be treated as different simulation, wouldn't it? So my question is how do I create sequential steps? The .dat file should look like below. 

 

Sol 400

CEND

STRAIN(PLOT)=ALL
STRESS(PLOT)=ALL
DISPLACEMENT(PLOT)=ALL
FORCE(PLOT)=ALL

ANALYSIS = NLSTATICS

NLSTEP = 1
 STEP 1
  SPC = 1 
  LOAD = 1
 STEP 2
  SPC = 2
  Load = 2
 STEP 3
  SPC = 2

 

BEGIN BULK

$----------------------------------------------------------$

 

 

 

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Answers

  • tinh
    tinh Altair Community Member
    edited June 2018

    If any card is not supported, you can input it directly by panel analysis>control cards>CASE_UNSUPPORTED_CARDS

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2018

    Thank You tinh. This would work. 

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