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Liquefied natural gas tender crashworthiness research
  • Published Date:
    2015-03-23
  • Language:
    English
Filetype[PDF-1.26 MB]


Details:
  • Creators:
  • Publication/ Report Number:
    JRC2015-5815
  • Resource Type:
  • Geographical Coverage:
  • Corporate Publisher:
  • NTL Classification:
    AGR-SAFETY AND SECURITY-SAFETY AND SECURITY ; NTL-RAIL TRANSPORTATION-Rail Safety ; NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION ; NTL-ENERGY AND ENVIRONMENT-Alternative Fuels ; NTL-SAFETY AND SECURITY-Vehicle DesignNTL-SAFETY AND SECURITY-SAFETY AND SECURITY ; NTL-SAFETY AND SECURITY-Rail Safety ; NTL-SAFETY AND SECURITY-Accidents ;
  • Format:
  • Abstract:
    This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.

    Research is being conducted to develop technical

    information needed to formulate effective natural gas fuel

    tender crashworthiness standards. This research is being

    performed for the Federal Railroad Administration’s (FRA’s)

    Office of Research, Development, and Technology, and

    intended to facilitate industry efforts to use natural gas as a

    locomotive fuel. Strategies to assure crashworthiness during

    moderate accidents, such as train-to-train collisions at speeds

    up to 40 mph, are being evaluated.

    This research applies the approach FRA has used to

    develop technical information on locomotive, hazmat tank car,

    and diesel fuel tank crashworthiness. There are four primary

    tasks:

    1. Definition of collision scenarios

    2. Evaluation of traditional designs

    3. Evaluation of alternative designs

    4. Recommendation of effective crashworthiness strategies

    The tender scenarios have been drafted from reviews of

    freight train accidents and of scenarios developed for

    locomotives, hazmat tank cars, and fuel tanks. From these

    reviews, five scenarios were selected. These scenarios are

    intended to bound the range of collisions that a tender may

    experience, are being used to evaluate the crashworthiness of

    traditional tender designs, and will be used to evaluate

    alternative design tenders. The five candidate scenarios are:

    1. Train-to-train collision

    2. Grade-crossing accident

    3. Tender derailment and rollover

    4. Impact into tender tank shell during derailment

    5. Impact into tender tank head during derailment

    As part of previous research on locomotives and passenger

    equipment, a range of crashworthiness analysis techniques

    were developed. These include simplified techniques, which

    can be performed rapidly and provide essential results, and

    detailed computer simulations which provide a wealth of

    information. The crashworthiness performance of a

    hypothetical tender design has been evaluated using simplified

    techniques. Simplified techniques include quasi-static crush

    analysis of structural elements and lumped-parameter analysis

    of train dynamics. The results suggest that efforts to enhance

    crashworthiness should principally be directed toward the trainto-

    train scenario. Work is ongoing to develop strategies for

    improving tender crashworthiness.

    This research is being conducted cooperatively with the

    Association of American Railroads (AAR). The research

    results are being shared with the AAR’s Natural Gas Fuel

    Tender Technical Advisory Group (NGFT TAG). The NGFT

    TAG is developing industry standards, including

    crashworthiness requirements, for revenue-service natural gas

    fuel tenders. There is a companion paper which describes

    crashworthiness research sponsored by AAR, including

    detailed computer simulations of tender crashworthiness. This

    paper describes development of scenarios and simplified

    analyses of tender crashworthiness.

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