This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Introduction of the Barrier Equivalent Time (BET) Methodology in the Analysis of Delta-V
Technical Paper
2000-01-0462
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The determination of delta-V from the Barrier Equivalent Velocity (BEV) using energy analysis techniques such as CRASH3 is common in the field of accident reconstruction. This paper introduces a new methodology for determining delta-V in the field of accident reconstruction. Specifically it will introduce a linear analysis technique which utilizes the time to common velocity associated with two vehicles involved in an impact. This method employs all the assumptions used in the derivation of the CRASH3 damage based solution but rather than using an energy based solution a linear Barrier Equivalent Time (BET) method will be employed.
This method requires the BEV, and thus the BET, of one of the vehicles involved in a collision and either the stiffness or the crush of the other vehicle. Instead of calculating the energies involved in the collision, the BET is used in conjunction with the time to common velocity in the impact. By remaining in the time domain the analysis remains linear and thus promotes a more coherent understanding between the BEV and delta-V relationship.
Recommended Content
Technical Paper | A Validation Study for the Force Balance Method in Determination of Stiffness Coefficients |
Technical Paper | An Impact Moment Coefficient for Vehicle Collision Analysis |
Technical Paper | Crash III and Canadian Test Data |
Authors
Citation
Long, T., "Introduction of the Barrier Equivalent Time (BET) Methodology in the Analysis of Delta-V," SAE Technical Paper 2000-01-0462, 2000, https://doi.org/10.4271/2000-01-0462.Also In
Accident Reconstruction: Analysis, Simulation, and Visualization
Number: SP-1491; Published: 2000-03-06
Number: SP-1491; Published: 2000-03-06
References
- NHTSA, CRASH3 User’s Guide and Technical Manual Revised Edition National Highway Traffic Safety Administration, DOT-HS-805732, April 1982
- McHenry R.R. A Computer Program for Reconstruction of Highway Accidents”, Proceedings of the Seventeenth Stapp Car Crash Conference, Oklahoma City, Oklahoma, November 1973
- McHenry R.R. Lynch J.P User’s Manual for the Crash Computer Program Calspan Report No. ZQ- 5708-V-3, Contract No. DOT-HS-5-01124, January 1976
- Tsongos N.G. CRASH3 Technical Manual U.S. DOT, NHTSA, NCSS, Accident Investigations Division, July 1976
- McHenry R.R. Computer Aids for Accident Investigation SAE 760776 , Proceedings of the 20 th Stapp Car Crash Conference
- Long T.J. A Validation Study for the Force Balance Method in Determination of Stiffness Coefficients SAE 1999-01-0079
- Jones N Structural Impact Cambridge University Press 1989