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Occupant Restraint CAE-Test Correlation 30 Cases

30 Chapters

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Build a Baseline Sled Model and Correlate Occupant Kinematics

Set up a validated frontal sled CAE model with a Hybrid III 50th percentile dummy, run the baseline simulation, and correlate head and chest acceleration time histories against a physical sled test using ISO 6487 filtering and objective rating metrics.

BaselineCorrelate

Correlate Seat Belt Force–Displacement with Retractor and Pretensioner Behavior

Calibrate the belt system in CAE by correlating shoulder and lap belt force–displacement curves, retractor spool-out, and pretensioner stroke against test data, isolating the effect of belt routing and friction on chest deflection correlation.

CorrelateDisplacement

Tune Airbag Deployment Timing and Venting for Driver Frontal Correlation

Adjust airbag inflator mass flow, vent hole area, and fabric permeability in the CAE model to match test-observed bag pressure and dummy chest acceleration, using a design-of-experiments sweep to identify the dominant correlation parameter.

DeploymentCorrelation

Correlate Knee Bolster and Lower Extremity Loading in Frontal Impact

Correlate femur axial force and knee slider displacement by calibrating knee bolster stiffness, foam crush behavior, and contact friction, then verify that lower extremity injury criteria match the physical test within a defined tolerance.

CorrelateExtremity

Validate Seat Cushion and Back Frame Compliance Effects on Occupant Response

Correlate seat cushion compression and back frame rotation by calibrating foam material properties and recliner stiffness in the CAE model, demonstrating how seat compliance changes chest and pelvis acceleration correlation.

ValidateCompliance

Correlate Steering Column Collapse and Column-Airbag Interaction

Calibrate the steering column collapse force and column airbag interaction in the CAE model to match test head resultant acceleration and chest deflection, focusing on the timing of column stroke relative to airbag contact.

CorrelateSteering

Side Impact Sled Correlation with ES-2re Dummy and Door Trim

Build and correlate a side impact sled model with an ES-2re dummy, calibrating door trim stiffness, armrest contact, and pelvic padding to match test-measured rib deflection and pelvic force.

CorrelationES-2re

Correlate Side Airbag and Curtain Airbag Deployment for Head Protection

Tune side airbag and curtain airbag inflation parameters in the CAE model to correlate head acceleration and neck injury metrics against a pole or barrier side impact test, isolating bag-to-head contact timing.

CorrelateDeployment

Rear Impact Seat and Head Restraint Correlation with BioRID

Correlate a rear impact sled model using a BioRID II dummy by calibrating head restraint geometry, seat back stiffness, and recliner energy absorption to match test neck injury criteria and head-to-head restraint gap.

RestraintCorrelation

Correlate Belt Pretensioner and Load Limiter Interaction in Frontal Impact

Calibrate the combined pretensioner firing timing and load limiter force level in the CAE model to match test chest deflection and belt force time histories, evaluating trade-offs between chest loading and forward excursion.

CorrelatePretensioner

Child Restraint System (CRS) Frontal Correlation with Q-Series Dummy

Correlate a forward-facing child restraint CAE model with a Q3 dummy against sled test data, calibrating CRS harness stiffness, shell contact, and ISOFIX anchorage compliance to match head and chest acceleration.

Correlate Out-of-Position (OOP) Occupant Airbag Interaction

Set up an OOP simulation with a dummy positioned close to the airbag module and correlate bag-to-occupant contact forces and head acceleration against test data, focusing on inflator output and bag fold pattern sensitivity.

CorrelateOut-of-Position

Calibrate Dummy Material and Joint Properties for Improved Correlation

Perform a targeted calibration of dummy neck, lumbar, and chest material properties in the CAE model using component-level test data, then verify that the updated dummy improves full-sled correlation without overfitting.

CalibrateMaterial

Correlate Seat Belt Slip and Geometry Effects on Chest Deflection

Investigate belt slip over the shoulder and lap belt geometry by correlating CAE belt path and friction coefficients with test-measured belt forces and chest deflection, identifying whether geometry or friction dominates the correlation gap.

CorrelateGeometry

Correlate Airbag Fabric Permeability and Fold Pattern Effects

Calibrate airbag fabric permeability and fold pattern in the CAE model to match test bag pressure and dummy head acceleration, using a sensitivity study to separate the effects of permeability from fold-induced deployment variation.

CorrelatePermeability

Correlate Occupant Response Sensitivity to Impact Pulse Variation

Run a pulse sensitivity study by varying sled acceleration pulse parameters within test-to-test scatter and correlate the resulting occupant response envelope, establishing which pulse characteristics most affect correlation robustness.

CorrelateOccupant

Correlate Restraint System Performance Across Multiple Dummy Sizes

Extend the correlated frontal sled model to 5th percentile female and 95th percentile male dummies, calibrating size-dependent belt fit and airbag interaction to match available test data for each dummy size.

CorrelateRestraint

Correlate Seat Integrated Restraint (SIR) System Behavior

Correlate a seat-integrated restraint CAE model by calibrating belt anchor motion, seat back deformation, and airbag interaction against test data, focusing on how seat structure compliance affects belt force and occupant kinematics.

CorrelateIntegrated

Correlate Far-Side Occupant Loading in Side Impact

Build and correlate a far-side occupant CAE model for a side impact event, calibrating seat belt and center console contact to match test head excursion and chest deflection, addressing the unique loading path of far-side occupants.

CorrelateFar-Side

Correlate Rollover Occupant Retention and Roof Crush Interaction

Correlate a rollover CAE model with occupant retention by calibrating roof crush stiffness, belt pretensioner timing, and occupant-to-roof contact against test data, focusing on head excursion and belt load correlation.

CorrelateRollover

Correlate Pedestrian Protection Head Impact with Hood and Airbag

Correlate a pedestrian head impact CAE model with active hood and pedestrian airbag against test data, calibrating hood deformation and airbag deployment timing to match head acceleration and HIC values.

CorrelatePedestrian

Correlate Occupant Response in Oblique Impact with Belt and Airbag Interaction

Set up an oblique impact sled model and correlate occupant chest deflection and head acceleration by calibrating belt load limiter, airbag venting, and seat rotation against test data, addressing the combined frontal and lateral loading.

CorrelateOccupant

Correlate Seat Belt Reminder and Occupant Detection Effects on Restraint Deployment

Model occupant detection sensor input and belt reminder logic in the CAE environment to correlate restraint deployment decisions with test outcomes, focusing on how sensor timing and occupant classification affect airbag firing.

CorrelateReminder

Correlate Airbag Module Mounting and Steering Wheel Compliance

Calibrate steering wheel rim stiffness, airbag module mounting compliance, and column interaction in the CAE model to match test driver airbag contact force and head acceleration, isolating mounting flexibility effects.

CorrelateMounting

Correlate Occupant Injury Criteria Using Objective Rating Methods

Apply objective correlation metrics such as CORA, ISO/TS 18571, and ANOVA-based rating to a set of frontal and side impact simulations, quantifying correlation quality and identifying which injury criteria fail acceptance thresholds.

CorrelateOccupant

Correlate Restraint System Robustness to Manufacturing and Test Variability

Perform a Monte Carlo simulation varying belt friction, airbag inflator output, and dummy positioning within manufacturing and test tolerances, then correlate the resulting occupant response distribution against repeated physical tests.

CorrelateRestraint

Correlate Seat Belt Anchor and Buckle Pretensioner Timing Effects

Calibrate anchor pretensioner and buckle pretensioner firing timing in the CAE model to match test belt force and chest deflection, evaluating the correlation sensitivity to pretensioner phasing between anchor and buckle.

CorrelatePretensioner

Correlate Occupant Response with Active Seat Belt and Pre-Crash Positioning

Model an active seat belt system with reversible pretensioning and pre-crash occupant positioning, correlating belt force and occupant kinematics against test data to assess how pre-crash activation changes restraint performance.

CorrelateOccupant

Correlate Airbag Out-of-Position and Low-Risk Deployment Test Data

Correlate low-risk deployment (LRD) test data with CAE by calibrating airbag inflator output versus time and bag fold for OOP conditions, focusing on occupant injury metrics under suppressed or delayed deployment.

CorrelateOut-of-Position

Correlate Full Vehicle Crash Occupant Response with Sled-to-Vehicle Transfer

Transfer a correlated sled model to a full vehicle crash CAE environment, calibrating vehicle deceleration pulse, seat and restraint mounting compliance, and occupant response against full vehicle test data to validate the transfer methodology.

CorrelateOccupant