57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
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"""
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Extract displacement results from OP2 file
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Auto-generated by Atomizer Phase 3 - pyNastran Research Agent
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Pattern: displacement
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Element Type: General
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Result Type: displacement
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API: model.displacements[subcase]
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"""
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from pathlib import Path
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from typing import Dict, Any
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import numpy as np
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from pyNastran.op2.op2 import OP2
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def extract_displacement(op2_file: Path, subcase: int = 1):
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"""Extract displacement results from OP2 file."""
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from pyNastran.op2.op2 import OP2
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import numpy as np
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model = OP2()
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model.read_op2(str(op2_file))
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disp = model.displacements[subcase]
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itime = 0 # static case
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# Extract translation components
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txyz = disp.data[itime, :, :3] # [tx, ty, tz]
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# Calculate total displacement
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total_disp = np.linalg.norm(txyz, axis=1)
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max_disp = np.max(total_disp)
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# Get node info
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node_ids = [nid for (nid, grid_type) in disp.node_gridtype]
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max_disp_node = node_ids[np.argmax(total_disp)]
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return {
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'max_displacement': float(max_disp),
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'max_disp_node': int(max_disp_node),
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'max_disp_x': float(np.max(np.abs(txyz[:, 0]))),
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'max_disp_y': float(np.max(np.abs(txyz[:, 1]))),
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'max_disp_z': float(np.max(np.abs(txyz[:, 2])))
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}
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if __name__ == '__main__':
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# Example usage
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import sys
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if len(sys.argv) > 1:
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op2_file = Path(sys.argv[1])
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result = extract_displacement(op2_file)
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print(f"Extraction result: {result}")
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else:
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print("Usage: python {sys.argv[0]} <op2_file>")
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