On March 23, 2006, a full-scale test was conducted on a passenger rail train retrofitted with newly developed cab end and non-cab end crush zone designs. This test was conducted as part of a larger testing program to establish the degree of enhanced performance of alternative design strategies for passenger rail crashworthiness. The alternative design strategy is referred to as crash energy management (CEM), where the collision energy is absorbed in defined unoccupied locations throughout the train in a controlled progressive manner. By controlling the deformations at critical locations the CEM train is able to protect against two dangerous modes of deformation: override and large-scale lateral buckling. The CEM train impacted a standing locomotive-led train of equal mass at 31 mph on tangent track. The interactions at the colliding in Interface and between coupled interfaces performed as expected. Crush was pushed back to subsequent crush zones and the moving passenger train remained in-line and upright on the tracks with minimal vertical and lateral motions. The added complexity associated with this test over previous full-scale tests of the CEM design was the need to control the interactions at the colliding interface. between the two very different engaging geometries. The cab end crush zone performed as intended because the locomotive coupler pushed underneath the cab car buffer beam, and the deformable anti-climber engaged the uneven geometry of the locomotive anti-climber and short hood. Space was preserved for the operator as the cab end crush zone collapsed. The coupled interfaces performed as predicted by the analysis and previous testing. The conventional interlocking anti-climbers engaged after the pushback couplers triggered and absorbed the prescribed amount of energy. Load was transferred through the integrated end frame, and progressive controlled collapsed was contained to the energy absorbers at the roof and floor level. The results of this full-scale test have clearly demonstrated the significant enhancement in safety for passengers and crew members involved in a push mode collision with a standing locomotive train.

1.
Cothen, G., Schulte, C., Horn, J., Tyrell, D., “Consensus Rulemaking at the Federal Railroad Administration,” TR News, Transportation Research Board, Number 236, January-February 2005.
2.
Tyrell, D., “U.S. Rail Equipment Crashworthiness Standards,” presented at ’What can We Realistically Expect from Crashworthiness?’ Rail Equipment Crashworthiness Symposium, Institute of Mechanical Engineers, May 2, 2001, London, England.
3.
U.S. Department of Transportation, Federal Railroad Administration, “49 CFR Part 216 et al., Passenger Equipment Safety Standards; Final Rule,” Federal Register, May 12, 1999.
4.
Tyrell, D.C., Severson, K.J., Marquis, B.J., “Crashworthiness of Passenger Trains,” U.S. Department of Transportation, DOT/FRA/ORD-97/10, 1998.
5.
Tyrell, D., Martinez, E., Jacobsen, K., Parent, D., Severson, K., Priante, M., Perlman, A.B., “Overview of a Crash Energy Management Specification for Passenger Rail Equipment,” American Society of Mechanical Engineers, Paper No. JRC2006-94044, April 2006.
6.
American Public Transportation Association, Member Services Department, Manual of Standards and Recommended Practices for Passenger Rail Equipment, Issue of May 1, 2004.
7.
Association of American Railroads, Technical Services Division, Mechanical Section-Manual of Standards and Recommended Practices, “Locomotive Crashworthiness Requirements, Standard S-580,” Adopted 1989, Revised 1994, Revised 2005.
8.
Mayville, R., Johnson, K., Tyrell, D., Stringfellow, R., “Rail Vehicle Car Cab Collision and Corner Post Designs According to APTA S-034 Requirements,” American Society of Mechanical Engineers, Paper No. MECE2003-44114, November 2003.
9.
Martinez, E., Tyrell, D., Rancatore, R., Stringfellow, R., Amar, G., “A Crush Zone Design for An Existing Passenger Rail Cab Car,” American Society of Mechanical Engineers, Paper No. IMECE2005-82769, November 2005.
10.
Mayville, R.A., Stringfellow, R.G., Rancatore, R.J., Hosmer, T.P., “Locomotive Crashworthiness Research, Volumes 5: Cab Car Crashworthiness Report” DOT/FRA/ORD-95/08.5, 1996.
11.
Tyrell, D.C., Severson, K.J., Mayville, R.A., Stringfellow, R.G., Berry, S., Perlman, A.B., “Evaluation of Cab Car Crashworthiness Design Modifications,” Proceedings of the 1997 IEEE/ASME Joint Railroad Conference, Institute of Electrical and Electronics Engineers, Catalog Number 97CH36047, 1997.
12.
Stringfellow, R.G., Mayville, R.A., Rancatore R., “A Numerical Evaluation of Protection Strategies for Railroad Cab Car Crashworthiness,” American Society of Mechanical Engineers, AMD Vol. 237/BED Vol. 45, 1999.
13.
Tyrell, D.C., Perlman, A.B., “Evaluation of Rail Passenger Equipment Crashworthiness Strategies,” Transportation Research Record No. 1825, pp. 8–14, National Academy Press, 2003.
14.
Tyrell, D., Severson, K., Perlman, A.B., “Single Passenger Rail Car Impact Test Volume I: Overview and Selected Results,” U.S. Department of Transportation, DOT/FRA/ORD-00/02.1, March 2000.
15.
Jacobsen, K., Tyrell, D., Perlman, A.B., “Impact Test of a Crash Energy Management Passenger Rail Car,” American Society of Mechanical Engineers, Paper No. RTD2004-66045, April 2004.
16.
Tyrell, D., Severson, K., Zolock, J., Perlman, A.B., “Passenger Rail Two-Car Impact Test Volume I: Overview and Selected Results,” U.S. Department of Transportation, DOT/FRA/ORD-01/22.I, January 2002.
17.
Jacobsen, K., Tyrell, D., Perlman, A.B., “Impact Tests of Crash Energy Management Passenger Rail Cars: Analysis and Structural Measurements,” American Society of Mechanical Engineers, Paper No. IMECE2004-61252, November 2004.
18.
Tyrell, D., “Passenger Rail Train-to-Train Impact Test Volume I: Overview and Selected Results,” U.S. Department of Transportation, DOT/FRA/ORD-03/17.I, July 2003.
19.
Severson, K., Parent, D., “Train-to-Train Impact Test of Crash Energy Management Passenger Rail Equipment: Occupant Experiments,” American Society of Mechanical Engineers, Paper No. IMECE2006-14420, November 2006.
20.
Zolock, J., Tyrell, D., “Locomotive Cab Occupant Protection,” American Society of Mechanical Engineers, Paper No. IMECE2003-44121, November 2003.
21.
Jacobsen, K., Severson, K., Perlman, A.B., “Effectiveness of Alternative Rail Passenger Equipment Crashworthiness Strategies,” American Society of Mechanical Engineers, Paper No. JRC2006-94043, April 2006.
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