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Author: Patricia Llana
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
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Book Description
"Abstract: The Office of Research, Development, and Technology of the Federal Railroad Administration (FRA) and the Volpe Center are evaluating new occupant protection technologies to increase the safety of passengers and operators in rail equipment. In view of the importance of override prevention in train-to-train collisions in which one of the vehicles is a locomotive, and the success of crash energy management technologies in cab-car-led passenger trains, the Volpe Center is evaluating the effectiveness of components that could be integrated into the end structure of a locomotive and are designed to mitigate the effects of a collision and, in particular, to prevent override of one lead vehicle onto the other. A research program has developed, fabricated, and tested two crashworthy components for the forward end of a locomotive: (1) a deformable anti-climber, and (2) a push-back coupler. Detailed designs were developed, and their performance was evaluated in large deformation dynamic finite element analysis (FEA). Designs were also developed for two test articles to verify the performance of the component designs in full-scale tests. The two test articles were fabricated and dynamically tested by means of rail car impact to verify their performance characteristics relative to specific requirements. The tests demonstrated the effectiveness of the two design concepts. Test results were consistent with finite element model predictions in terms of energy absorption capability, force-displacement behavior, and modes of deformation."--Technical report documentation page.
Author: Patricia Llana
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
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Book Description
"Abstract: The Office of Research, Development, and Technology of the Federal Railroad Administration (FRA) and the Volpe Center are evaluating new occupant protection technologies to increase the safety of passengers and operators in rail equipment. In view of the importance of override prevention in train-to-train collisions in which one of the vehicles is a locomotive, and the success of crash energy management technologies in cab-car-led passenger trains, the Volpe Center is evaluating the effectiveness of components that could be integrated into the end structure of a locomotive and are designed to mitigate the effects of a collision and, in particular, to prevent override of one lead vehicle onto the other. A research program has developed, fabricated, and tested two crashworthy components for the forward end of a locomotive: (1) a deformable anti-climber, and (2) a push-back coupler. Detailed designs were developed, and their performance was evaluated in large deformation dynamic finite element analysis (FEA). Designs were also developed for two test articles to verify the performance of the component designs in full-scale tests. The two test articles were fabricated and dynamically tested by means of rail car impact to verify their performance characteristics relative to specific requirements. The tests demonstrated the effectiveness of the two design concepts. Test results were consistent with finite element model predictions in terms of energy absorption capability, force-displacement behavior, and modes of deformation."--Technical report documentation page.
Author: Patricia Llana
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Abstract: "The Office of Research, Development, and Technology of the Federal Railroad Administration (FRA) and the Volpe Center are continuing to evaluate new technologies for increasing the safety of passengers and operators in rail equipment. The results of vehicle-to-vehicle override, where the strong underframe of one vehicle, typically a locomotive, impacts the weaker superstructure of the other vehicle, can be devastating. Crashworthy components which can be integrated into the end structure of a locomotive have been developed to inhibit override in the event of collision. Recent research has resulted in the development of a design concept, including evaluation with finite-element analysis (FEA), fabrication, and component tests. The design concept developed incorporates two key components: a push-back coupler and a deformable anti-climber. Detailed designs for these components were developed and the performance of the designs was evaluated through large deformation dynamic FEA. Test articles were fabricated and dynamically tested to verify their individual performance characteristics. The tests were successful in demonstrating the required performance of the components. Test results were consistent with finite element model predictions of energy absorption capability, force-displacement behavior, and modes of deformation. Work is ongoing to retrofit these crashworthy components onto conventional locomotives and conduct full-scale dynamic impact tests of colliding cars, as well as colliding trains. Service tests will be performed to measure the impact speed at which push-back coupler triggering occurs. Vehicle-to-vehicle tests will be conducted to demonstrate the performance of the crashworthy components working together as an integrated system. The vehicle-to-vehicle tests will also allow an evaluation of the crashworthiness compatibility of a modified locomotive with a range of equipment, including conventional locomotives, cab cars, and freight cars. Train-to-train tests are planned to demonstrate incremental improvement, increased crashworthiness, compatibility, and serviceability. This paper describes the tests that are planned to demonstrate the behavior of these components when they are integrated into the end structure of a locomotive. The tests will demonstrate the in-service and crashworthiness performance of the modified locomotives. This research program endeavors to advance locomotive crashworthiness technology and develop the technical basis for generating specifications for push-back couplers and deformable anti-climbers."
Author: G. Samavedam
Publisher:
ISBN:
Category : Locomotives
Languages : en
Pages : 35
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This report presents the test results and finite element correlations of a full-scale dynamic collision test with rail vehicles as part of the Federal Railroad Administration's research program on improved crashworthiness of locomotive structures. This test involved the 30-mile per hour oblique collision of a locomotive with a stationary covered hopper car fouling the locomotive's right-of-way. The test used an SD70-MAC locomotive. The locomotive and the cars in its consist were fully instrumented with accelerometers, strain gauges, and anthropomorphic test dummies. High-speed photography was used to record the events. This report presents the test data and the dynamic finite element modeling results. Reasonable agreement has been found in the dynamic event sequence correlations and the structural damage to the front end of the locomotive.
Author: U.s. Department of Transportation
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723469862
Category :
Languages : en
Pages : 34
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Book Description
Full-scale locomotive dynamic crash testing and correlations : C-39 type locomotive colliding with a loaded hopper car (test 7) : final report /
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: U.s. Department of Transportation
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723469343
Category :
Languages : en
Pages : 44
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Full-scale locomotive dynamic collision testing and correlations : offset collisions between a locomotive and a covered hopper car (test 4) /
Author: G. Samavedam
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Patricia Llana
Publisher:
ISBN:
Category : Locomotives
Languages : en
Pages : 74
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Book Description
"Abstract: The Federal Railroad Administration (FRA) and the John A. Volpe National Transportation Systems Center (Volpe Center) are continuing to evaluate new technologies for increasing the safety of passengers and operators in rail equipment. In recognition of the importance of override prevention in train-to-train collisions in which one of the vehicles is a locomotive, and in light of the success of crash energy management technologies in cab car-led passenger trains, the Volpe Center seeks to evaluate the effectiveness of components that could be integrated into the end structure of a locomotive that are specifically designed to mitigate the effects of a collision and, in particular, to prevent override of one of the lead vehicles onto the other. The research program described in this report aims to develop, fabricate, and test two crashworthy components for the forward end of a locomotive: (1) a deformable anti-climber and (2) a push-back coupler."--Technical report documentation page.
Author:
Publisher:
ISBN:
Category : Locomotive engineers
Languages : en
Pages : 352
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Author: United States. Congress. Senate. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations
Publisher:
ISBN:
Category : Political Science
Languages : en
Pages : 2018
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