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