# Large Physics Model

Static aeroelastic coupling of a transonic swept wing used to rerun CFD at every iteration, taking about four hours to converge. Replacing the flow solve with a full-field physics model that predicts surface pressure and wall shear stress directly from CAD geometry brings the same loop to 8 to 11 minutes on a single T4 GPU; on three wings both loops converged in four iterations and their predicted washout lift loss differed by 0.2 to 0.8 percentage points.

Static aeroelastic coupling of a transonic swept wing used to rerun CFD at every iteration, taking about four hours to converge. Replacing the flow solve with a full-field physics model that predicts surface pressure and wall shear stress directly from CAD geometry brings the same loop to 8 to 11 minutes on a single T4 GPU; on three wings both loops converged in four iterations and their predicted washout lift loss differed by 0.2 to 0.8 percentage points.

Luminary released SHIFT-NVH, a large physics model trained on finite-element solves of a single body-in-white that takes the gauges of 15 parts, the material and the vehicle speed and returns RMS acceleration in x, y and z at all 130,713 surface nodes under ISO 8608 class B road excitation. On 192 test cases split by design, with material and speed unseen, the median relative L2 field error is 1.1% and the median part RMS error is 0.47%, about one tenth of the 5.4% median gauge-induced change. The model covers a fixed mesh, ±30% gauge, three materials and four speeds from 30 to 110 km/h, and final gauge decisions still rest on full FE and physical testing.

Luminary released SHIFT-NVH, a large physics model trained on finite-element solves of a single body-in-white that takes the gauges of 15 parts, the material and the vehicle speed and returns RMS acceleration in x, y and z at all 130,713 surface nodes under ISO 8608 class B road excitation. On 192 test cases split by design, with material and speed unseen, the median relative L2 field error is 1.1% and the median part RMS error is 0.47%, about one tenth of the 5.4% median gauge-induced change. The model covers a fixed mesh, ±30% gauge, three materials and four speeds from 30 to 110 km/h, and final gauge decisions still rest on full FE and physical testing.