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Delta-V, Barrier Equivalent Velocity and Acceleration Pulse of a Vehicle During an Impact
Technical Paper
2005-01-1187
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
Delta-V and Barrier Equivalent Velocity (BEV) are terms that have been used for many years to describe aspects of what happened to a vehicle when an impact occurred. That is, they are used to describe some physical change in the vehicle state before the impact as compared to after the impact. Specifically, the Delta-V describes the change in the vehicle velocity vector from just before the impact until just after the impact. The BEV attempts to quantify the energy required to cause the damage associated with an impact.
In order to understand what happens to a vehicle and its occupants during an impact, it is necessary to examine the acceleration pulse undergone by the vehicle during the impact. The acceleration pulse describes, in detail, how the Delta-V occurs as a function of time, and is related with the deformation of the vehicle as well as the object contacted by the vehicle during an impact. While Delta-V and BEV are often used to describe the thresholds at which a passive restraint system will function, it is the acceleration pulse that the sensors of a restraint system measure, and that ultimately determines if, when, and how passive vehicle restraints will be deployed in an impact. This paper examines this issue and gives examples illustrating that the shape and duration of the acceleration pulse experienced by a vehicle in an impact depends on many variables.
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Cheng, P., Tanner, C., Chen, H., Durisek, N. et al., "Delta-V, Barrier Equivalent Velocity and Acceleration Pulse of a Vehicle During an Impact," SAE Technical Paper 2005-01-1187, 2005, https://doi.org/10.4271/2005-01-1187.Data Sets - Support Documents
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References
- Agaram, Venkatesh Xu, Lan Wu, Jianping Kostyniuk, Gregory Nusholtz, Guy “Comparison of Frontal Crashes in Terms of Average Acceleration,” SAE Paper No. 2000-01-0880 2000
- Asay, Alan. F. Jewkes, Dagmar B. Woolley, Ronald L. “Narrow Object Impact Analysis and Comparison with Flat Barrier Impacts,” SAE Paper No. 2002-01-0552 2002
- Burkhard, Peter M. “ΔV, BEV and Coefficient of Restitution Relationships as Applied to the Interpretation of Vehicle Crash Test Data,” SAE Paper No. 2001-01-0499 2001
- Campbell, Kenneth “Energy Basis for Collision Severity,” SAE Paper No. 740565 1974
- Chen, H. Fred Tanner, C. Brian Durisek, Nicholas J. Guenther, Dennis A. “Pole Impact Speeds Derived from Bilinear Estimations of Maximum Crush for Body-On-Frame Constructed Vehicles,” SAE Paper No. 2004-01-1615 2004
- Durisek, Nicholas J. Tanner, C. Brian Chen, H. Fred Guenther, Dennis A. “Vehicle Characterization Through Pole Impact Testing, Part I: Vehicle Response in Terms of Acceleration Pulses,” SAE Paper No. 2004-01-1210 2004
- Hight, Philip V. Lent-Koop, D. Bruce Hight, Robert A. “Barrier Equivalent Velocity, Delta-V and CRASH3 Stiffness in Automobile Collisions” SAE 850437 1985
- Husted, Daniel C. Biss, David J. Heverly, David E. “The Appropriate Use of “Delta-V” in Describing Accident Severity,” SAE Paper No. 1999-01-1295 1999
- Kerkhoff, John F. Husher, Stein E. Varat, Michael S. Busenga, Alison M. Hamilton, Kevin “An investigation into Vehicle Frontal Impact Stiffness for Reconstruction,” SAE Paper No. 930899 1993
- Robinette, Ric D. Fay, Richard J. Paulsen, Rex E. “Delta-V: Basic Concepts, Computational Methods, and Misunderstandings,” SAE Paper No. 940915 1994
- Smith, G. C. James M. B. Perl, T. R. Struble, D.E. “Frontal Crush Energy and Impulse Analysis of Narrow Object Impacts,” Paper 87-WA/SAF-5 presented at the ASME Winter Annual Meeting December 1987
- Tanner, C. Brian Wiechel, John F. Bixel, Ron A. Cheng, Philip H. Guenther, Dennis A. Cassidy, Michael “Coefficients of Restitution for Low and Moderate Speed Impacts with Non-Standard Impact Configurations” SAE 2001-01-0891 2001
- Tanner, C. Brian Wiechel, John F. Cheng, Philip H. Guenther, Dennis A. Fay, Richard “The Use of Single Moving Vehicle Testing to Duplicate the Dynamic Vehicle Response from Impacts Between Two Moving Vehicles” SAE 2002-01-0558 2002
- Varat, Michael S. Husher, Stein E. “Vehicle Crash Severity Assessment in Lateral Pole Impacts,” SAE Paper No. 1999-01-0100 1999
- Chen, H. Fred Tanner, C. Brian Cheng, Philip H. Guenther, Dennis A. “Application of Force Balance Method in Accident Reconstruction.” SAE Paper No. 2005-01-1188 2005