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Vehicle Dynamics in Non-Collinear Low-Velocity, Rear End Collisions
Technical Paper
2004-01-1193
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The vehicle dynamics of non-collinear, low-velocity front-to- rear collisions have received little formal study. The twenty-three angled collisions conducted for this project revealed significant vehicle dynamic differences when compared with similar-energy collinear rear-end collisions. Two recent model year vehicles were used to conduct non-collinear collisions at a nominal 12 km/h impact velocity. The pre-collision angles between the test vehicles were established so that the striking vehicle's line of action through its CG was either 15 or 30 degrees from the stationary struck vehicle's initial heading. Both vehicles had accelerometers at their CG's measuring longitudinal and lateral accelerations. The struck vehicle also had sensors to measure CG vertical accelerations, yaw rates, and longitudinal and lateral velocities. Film from three high-speed 16-mm [film] cameras was digitized and analyzed for each collision. The ΔV at various points within the struck vehicle was studied. The time-history of the center of rotation of the struck vehicle was analyzed and correlated to tire slippage. The ΔV of the struck vehicle decreased as the angle between vehicles increased from 15 to 30 degrees with energy dissipated by suspension motion and scrubbing of the struck vehicle's tires. For the struck vehicle, collisions at 15-degree angles were more akin to pure collinear rear-end collisions; collisions at 30-degree angles showed a more pronounced curvilinear-translation of the CG of the struck vehicle with rotation about a point near its left-front tire. Variations in translational and rotational vehicle dynamics with respect to impact angle were sufficient to alter the resulting occupant motion.
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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.Also In
References
- Severy, D. M. et al. “Controlled Automobile Rear-End Collisions, An Investigation of Related Engineering and Medical Phenomena.” Canadian Services Medical Journal 1955 vii 727 59
- McConnell, W. et al. “Analysis Of Human Test Subject Kinematic Responses to Low Velocity Rear End Impacts.” 1993 International SAE Congress and Exposition Detroit 1993
- McConnell, W. et al. “Human Head and Neck Kinematics After Low-Velocity Rear-End Impacts.” 39 th Stapp Car Crash Conference San Diego, CA 1995
- Siegmund, G. P. Bailey, M. N. King, D. J. 1994 Characteristics of specific automobile bumpers in low-velocity impacts Accident Reconstruction:Technology and Animation IV (SP-1030) Warrendale, PA Society of Automotive Engineers 1994 333 372 SAE Paper # 940916
- Szabo, T.J. Welcher, J. 1992 Dynamics of low speed crash tests with energy absorbing bumpers Automobile Safety: Present and Future Technology (Society of Automotive Engineers SP-925) Warrendale, PA Society of Automotive Engineers 1992 1 9 SAE Paper # 921573
- McConnell, W. E. et al. “Non-Collinear Low Velocity Rear End Collision Human Kinematics.” The Association for the Advancement of Automotive Medicine Lisbon, Portugal, 2003
- WINanalyze Automatic Motion Analysis V. 1.4 Mikromak 1998
- SAE J211-1 Instrumentation for Impact Test - Part 1 - Electronic Instrumentation 2003 SAE Handbook Warrendale, PA Mar. 1995
- Haykin, Simon Communication Systems New York John Wiley & Sons, Inc. 1994
- Guzman, H.M. et al. “Human Acceleration Measurements in Low-Speed, Angled Rear End Collisions.” Instrumentation Systems, and Automation Society EXPO 2003 Houston, Texas 2003