Atomizer/studies/bracket_displacement_maximizing/test_fix.py

"""Quick test to verify expression updates are working"""
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent.parent.parent))

from optimization_engine.nx.solver import NXSolver
from optimization_engine.nx.updater import NXParameterUpdater

study_dir = Path(__file__).parent
prt_file = study_dir / "model" / "Bracket.prt"
sim_file = study_dir / "model" / "Bracket_sim1.sim"

print("Testing expression update workflow...")
print()

# Test with two different parameter sets
test_params = [
    {'tip_thickness': 15.0, 'support_angle': 25.0},
    {'tip_thickness': 25.0, 'support_angle': 35.0},
]

updater = NXParameterUpdater(prt_file_path=prt_file)
solver = NXSolver(nastran_version='2412', use_journal=True)

for i, params in enumerate(test_params):
    print(f"Trial {i}: tip_thickness={params['tip_thickness']}, support_angle={params['support_angle']}")

    # Update .prt file
    updater.update_expressions(params)
    updater.save()

    # Run simulation WITH expression_updates
    result = solver.run_simulation(sim_file, expression_updates=params)

    if result['success']:
        print(f"  SUCCESS: OP2 generated")

        # Read OP2 to check displacement
        from pyNastran.op2.op2 import OP2
        model = OP2()
        model.read_op2(str(result['op2_file']))

        if hasattr(model, 'displacements') and model.displacements:
            disp = model.displacements[1]
            max_disp = abs(disp.data[:, :3]).max()
            print(f"  Max displacement: {max_disp:.6f} mm")
        print()
    else:
        print(f"  FAILED")
        print()

print("If the two displacement values are DIFFERENT, the fix worked!")