87 lines
2.9 KiB
Python
87 lines
2.9 KiB
Python
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"""
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Quick OP2 diagnostic script
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"""
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from pyNastran.op2.op2 import OP2
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from pathlib import Path
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op2_path = Path("examples/bracket/bracket_sim1-solution_1.op2")
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print("="*60)
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print("OP2 FILE DIAGNOSTIC")
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print("="*60)
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print(f"File: {op2_path}")
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op2 = OP2()
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op2.read_op2(str(op2_path))
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print("\n--- AVAILABLE DATA ---")
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print(f"Has displacements: {hasattr(op2, 'displacements') and bool(op2.displacements)}")
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print(f"Has velocities: {hasattr(op2, 'velocities') and bool(op2.velocities)}")
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print(f"Has accelerations: {hasattr(op2, 'accelerations') and bool(op2.accelerations)}")
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# Check stress tables
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stress_tables = {
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'cquad4_stress': 'CQUAD4 elements',
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'ctria3_stress': 'CTRIA3 elements',
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'ctetra_stress': 'CTETRA elements',
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'chexa_stress': 'CHEXA elements',
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'cbar_stress': 'CBAR elements'
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}
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print("\n--- STRESS TABLES ---")
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has_stress = False
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for table, desc in stress_tables.items():
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if hasattr(op2, table):
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table_obj = getattr(op2, table)
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if table_obj:
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has_stress = True
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subcases = list(table_obj.keys())
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print(f"\n{table} ({desc}): Subcases {subcases}")
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# Show data from first subcase
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if subcases:
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data = table_obj[subcases[0]]
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print(f" Data shape: {data.data.shape}")
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print(f" Data dimensions: timesteps={data.data.shape[0]}, elements={data.data.shape[1]}, values={data.data.shape[2]}")
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print(f" All data min: {data.data.min():.6f}")
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print(f" All data max: {data.data.max():.6f}")
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# Check each column
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print(f" Column-wise max values:")
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for col in range(data.data.shape[2]):
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col_max = data.data[0, :, col].max()
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print(f" Column {col}: {col_max:.6f}")
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# Find max von Mises (usually last column)
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von_mises_col = data.data[0, :, -1]
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max_vm = von_mises_col.max()
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max_idx = von_mises_col.argmax()
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print(f" Von Mises (last column):")
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print(f" Max: {max_vm:.6f} at element index {max_idx}")
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if not has_stress:
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print("NO STRESS DATA FOUND")
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# Check displacements
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if hasattr(op2, 'displacements') and op2.displacements:
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print("\n--- DISPLACEMENTS ---")
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subcases = list(op2.displacements.keys())
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print(f"Subcases: {subcases}")
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for subcase in subcases:
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disp = op2.displacements[subcase]
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print(f"Subcase {subcase}:")
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print(f" Shape: {disp.data.shape}")
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print(f" Max displacement: {disp.data.max():.6f}")
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# Check grid point weight (mass)
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if hasattr(op2, 'grid_point_weight') and op2.grid_point_weight:
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print("\n--- GRID POINT WEIGHT (MASS) ---")
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gpw = op2.grid_point_weight
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print(f"Total mass: {gpw.mass.sum():.6f}")
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else:
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print("\n--- GRID POINT WEIGHT (MASS) ---")
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print("NOT AVAILABLE - Add PARAM,GRDPNT,0 to Nastran deck")
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print("\n" + "="*60)
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