Occupant Kinematics in Laboratory Rollover Tests: PMHS Response

Area of Science:

• Biomechanics
• Automotive Safety Engineering
• Crashworthiness

Background:

• Rollover crashes pose significant risks to vehicle occupants.
• Understanding occupant kinematics is vital for improving vehicle safety and restraint systems.

Purpose of the Study:

• To characterize the whole-body kinematic response of restrained Post-Mortem Human Subjects (PMHS) during controlled laboratory rollover tests.
• To generate comprehensive kinematic data for validating and enhancing Anthropometric Test Devices (ATDs) and computational models.

Main Methods:

• Conducted 36 rollover tests using a dynamic rollover test system (DRoTS) and a parametric vehicle buck with four adult male PMHS.
• Simulated various rollover conditions including quasi-static inversion, inverted drop/catch, pure dynamic roll, and combined roll/drop scenarios.
• Utilized a 3D motion capture system to quantify whole-body displacement and spinal kinematics (rotations, extension, compression) relative to the vehicle buck.

Main Results:

• Quantified occupant displacement in longitudinal, lateral, and vertical axes across different rollover severities.
• Detailed intrasegmental spinal kinematics, including rotations and compression/extension.
• Provided extensive kinematic response data for restrained occupants under diverse dynamic rollover conditions.

Conclusions:

• The study generated a comprehensive dataset of restrained occupant kinematics during simulated rollover events.
• These findings are essential for the development and refinement of ATDs and computational models used in rollover crash analysis.
• The data will aid in improving the accuracy of simulations and the effectiveness of safety measures in rollover crashes.