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