Reference Models — Isogrid Dev Plate
Golden copies of the NX model files. Do not modify these directly.
Studies copy these to their own working directory before running.
NX File Set
| File | Description | Status |
|---|---|---|
ACS_Stack_Main_Plate_Iso_Project.prt |
NX CAD geometry — flat plate with bolt holes | ✅ Present |
ACS_Stack_Main_Plate_Iso_project_fem2_i.prt |
Idealized part — must be loaded before UpdateFemodel() |
✅ Present |
ACS_Stack_Main_Plate_Iso_project_fem2.fem |
FEM file — 3D solid mesh (CHEXA/CTETRA) | ✅ Present |
ACS_Stack_Main_Plate_Iso_project_sim2.sim |
Simulation — SOL 101 linear static | ✅ Present |
Baseline FEA Results
From the baseline solid-plate solve (sim2, solution_1):
| File | Description |
|---|---|
acs_stack_main_plate_iso_project_sim2-solution_1.op2 |
Binary results — used for stress field extraction |
acs_stack_main_plate_iso_project_sim2-solution_1.f06 |
Solution text output — check for warnings/errors |
acs_stack_main_plate_iso_project_sim2-solution_1.dat |
Nastran input deck |
acs_stack_main_plate_iso_project_sim2-solution_1.log |
NX solve log |
Key Notes
- Idealized part is critical: without loading
*_fem2_i.prt,UpdateFemodel()silently skips mesh regeneration — parametric updates have no effect on the mesh. - Solver: NX Nastran SOL 101 (linear static)
- Units: kg-mm-s → stress in kPa (extractor divides by 1000 → MPa)
- Simulation name:
sim2, Solutionsolution_1 - Sandboxes: 2 regions tagged
ISOGRID_SANDBOXin the model
Study Setup Checklist
When creating a new study under studies/NN_*/, copy these files to the study's model directory:
ACS_Stack_Main_Plate_Iso_Project.prtACS_Stack_Main_Plate_Iso_project_fem2_i.prt← often forgotten, causes silent mesh freezeACS_Stack_Main_Plate_Iso_project_fem2.femACS_Stack_Main_Plate_Iso_project_sim2.sim
Do NOT copy the .op2, .dat, .f06, .log files — those are generated fresh by each solve.