COMPUTES THE CDI¶
Computes the Chest Deflection Index (CDI) for occupant safety assessment by combining pressure-map data, belt-to-chest force, chest potentiometer coordinates, and chest displacement time history. Use this worker when evaluating thoracic injury risk from shoulder-belt loading in crash simulations.
When to use¶
Tagged: belt_force, cdi, chest_deflection_index, injury_criteria, occupant_safety, potentiometer, pressure_map, rib.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Pressure Information | dataset_1 | dataset | — | ✓ | Pressure dataset in long format with columns [time, x, y, z, pressure] for each MAT segment; column order must match the input_data_columns parameter. |
| Number of Pressure segments per row | num_segments | scalar | 40 | ✓ | Number of pressure segments (MAT elements) per time row; defaults to 40 — change only if the pressure mesh was defined with a different segment count. |
| Best to Chest Force | belt_2_chest | vector | — | ✓ | Time-history vector of the total shoulder-belt-to-chest contact force (N vs. time) used to locate the belt centre-line. |
| Chest Potentiometer Coordinates | chest_potentiometer | dataset | — | ✓ | Dataset of chest potentiometer (Sternbum pot/ball) global coordinates as columns [time, X, Y, Z] (mm) used to track sternum position. |
| Chest Displacement Time History | chest_displacement | vector | — | ✓ | Chest displacement time history vector (mm vs. time) representing the measured or simulated sternum deflection curve. |
| Columns for the input dataset | input_data_columns | textarea | time,x,y,z,pressure | ✓ | Comma-separated column names for dataset_1; defaults to time,x,y,z,pressure — override only if the pressure dataset uses different column labels or ordering. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| CDI | cdi | scalar | Scalar Chest Deflection Index value (dimensionless integer) representing the computed thoracic injury metric; higher values indicate greater injury risk. |
Disciplines¶
- cae.postprocessing.response
- data.dataset.transform
- engineering.crash.occupant_safety
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