This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Using the Instantaneous Center of Rotation to Examine the Influence of Yaw Rate on Occupant Kinematics in Eccentric Planar Collisions
Technical Paper
2022-01-0826
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The biomechanical injury assessment for an occupant in a planar vehicle-to-vehicle collision often requires a kinematic analysis of impact-related occupant motion. This analysis becomes more complex when the collision force is eccentric to the center of gravity on a struck vehicle because the vehicle kinematics include both translation and potentially significant yaw rotational rates. This study examines the significance of vehicle yaw on occupant kinematics in eccentric (off-center) planar collisions. The paper describes the calculation of the instantaneous center of rotation (ICR) in a yawing vehicle post-impact and explores how mapping this quantity may inform an occupant’s trajectory when using a free particle “occupant” analysis. The study initially analyzed the impact-related occupant motion for all the outboard seat positions in a minivan using several hypothetical examples of eccentric vehicle-to-vehicle crash configurations with varying PDOF, delta-V, and yaw rate. The ICR and free particle occupant trajectories were calculated for six different simulated crash examples to illustrate which seating positions were most influenced by post-impact vehicle yaw. The process was repeated for all the outboard seat positions in a sedan using the vehicle kinematics from a staged two-vehicle crash test. It was found that the ICR can provide the crash analyst or the biomechanist a useful mechanism to visualize the relationship between vehicle and occupant kinematics in an eccentric planar vehicle collision.
Topic
Citation
Rapp van Roden, E. and Zolock, J., "Using the Instantaneous Center of Rotation to Examine the Influence of Yaw Rate on Occupant Kinematics in Eccentric Planar Collisions," SAE Technical Paper 2022-01-0826, 2022, https://doi.org/10.4271/2022-01-0826.Also In
References
- Cheng , P. and Guenther , D. Effects of Change in Angular Velocity of a Vehicle on the Change in Velocity Experienced by an Occupant during a Crash Environment and the Localized Delta V Concept SAE Technical Paper 890636 1989 https://doi.org/10.4271/890636
- Fay , R. , Raney , A. , and Robinette , R. The Effect of Vehicle Rotation on the Occupants’ Delta V SAE Technical Paper 960649 1996 https://doi.org/10.4271/960649
- Nyquist , G. and Kennedy , E. Accident Victim Interaction with Vehicle Interior: Reconstruction Fundamentals SAE Technical Paper 870500 1987 https://doi.org/10.4271/870500
- Marine , M. and Werner , S. Delta-V Analysis from Crash Test Data for Vehicles with Post-Impact Yaw Motion SAE Technical Paper 980219 1998 https://doi.org/10.4271/980219
- Bready , J. , Nordhagen , R. , Perl , T. , and James , M. Methods of Occupant Kinematics Analysis in Automobile Crashes SAE Technical Paper 2002-01-0536 2002 https://doi.org/10.4271/2002-01-0536
- Smith , G. Reconstructing Vehicle and Occupant Motion from EDR Data in High Yaw Velocity Crashes SAE Technical Paper 2021-01-0892 2021 https://doi.org/10.4271/2021-01-0892
- Marine , M. and Werner , S. Delta-V Analysis from Crash Test Data for Vehicles with Post-Impact Yaw Motion SAE Technical Paper 980219 1998 https://doi.org/10.4271/980219
- Wirth , J. , Marine , M. , and Thomas , T. An Analysis of a Staged Two-Vehicle Impact SAE Technical Paper 2000-01-0464 2000 https://doi.org/10.4271/2000-01-0464
- Guzman , H. , McConnell , W. , and Smith , D. Vehicle Dynamics in Non-Collinear Low-Velocity, Rear End Collisions SAE Technical Paper 2004-01-1193 2004 https://doi.org/10.4271/2004-01-1193
- Scurlock , B. , Rich , A. , and Poe , K. Corrections to Off-Axis Delta-V Measurements from Event Data Recorders Collision 15 1 2021