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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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