| Convergence | ❓ **NOT VERIFIED** | Gap G8 partially closed (type known), but convergence check still needed |
### Mesh Estimate
- Beam length 5,000 mm / 33.7 mm ≈ 148 elements along length
- Perimeter of I-beam cross-section ≈ varies — but total mesh likely 10K–50K elements
- Expected DOF: 60K–300K → SOL 101 solve time: seconds to low minutes
## Solver Considerations
*From Technical Breakdown (Gen 001), updated with KBS data:*
- **Linear assumption:** With 11.33 kg beam under 98 kN load, deflections may be significant relative to beam dimensions. L/δ ratio needs verification from baseline run.
- **Mesh sensitivity:** Stress at hole edges is mesh-dependent. CQUAD4 at 33.7 mm may not fully resolve SCF at 300 mm diameter holes (~28 elements around circumference — probably adequate but needs verification).
- **Mesh morphing vs remesh:** Parametric NX models typically remesh on update. Need to confirm behavior across DV range (Gap G7).
- **Runtime estimate:** Single beam, CQUAD4 thin shell → likely **seconds per evaluation**. Very fast.
- **Unit system:** NX model uses kg-mm-s (kgf for force). Nastran output stress in kPa → divide by 1000 for MPa.
## Validation Checklist
- [ ] Baseline mass matches NX expression `p1` (11.33 kg)
- [ ] Baseline displacement measured (was 22 mm at old model state — **needs re-verification** G10)
- [ ] Baseline stress measured (never had a value — **G11**)
- [ ] Mesh convergence verified at baseline
- [ ] Mesh quality acceptable at DV range extremes
- [ ] Model rebuilds cleanly at all 4 corners of design space (Gap G7)
- [ ] Stress at hole edges resolved with current mesh density
## History
- **Gen 001** (2026-02-09): Initial documentation from technical breakdown. All solver details pending gap resolution.
- **Gen 002** (2026-02-10): Confirmed from KBS session — CQUAD4 thin shell, 33.7 mm element size, cantilever BCs (left fixed, right 10,000 kgf down), mass via `p1`. Material: AISI 1005.
