The Kinematic Analysis of Occupant Excursions and Accelerations During Staged Low Speed Far-Side Lateral Vehicle-to-Vehicle Impacts 2019-01-1030
The collection of research that examines and characterizes occupant kinematics during low speed lateral vehicle-to-vehicle impacts is far less comprehensive than the much larger body of literature that quantifies the occupant kinematics associated with low speed rear end impacts. In order to augment the available data, a series of 44 low speed far-side lateral vehicle-to-vehicle impacts were conducted in a laboratory setting. A combination of accelerometers and 3D motion tracking technology was used to capture the vehicle dynamics of the target and bullet vehicles and to characterize the collision. The target vehicle was initially stationary; the bullet vehicle impacted the target vehicle at the front passenger side door. The bullet vehicle pre-impact speeds over all tests ranged from 2.5 to 5.5 mph. Nine volunteers participated in the study. Volunteers were seated in the driver seat during the impacts and were outfitted with accelerometers on their head and lower back and wore reflective markers for 3D motion tracking on the left side of their body. The design of experiment included conducting lateral impacts while the volunteers were in both “alert” and “distracted” states to identify any potential influence bracing had on occupant kinematics. In addition, possible effects of gender and anthropometry were explored. Primary outcome measures that were analyzed for each lateral impact included occupant accelerations measured at the head and lumbar spine, and head lateral displacement from the pre-impact, nominal seated position relative to the vehicle interior. Volunteer peak resultant head and lumbar accelerations (including gravity) ranged from 1.90 to 4.32 g and from 1.56 to 4.02 g, respectively. The peak displacement of the head away from the driver door was 3.91 to 12.28 inches while the peak displacement of the head toward the driver door ranged from 0.12 to 7.31 inches.
Peggy Shibata, Julius Roberts, James Sprague, Alyson Light, Jacob Stegemann, Manuel Meza-Arroyo, Shawn Capser