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Collision dynamics modeling of crash energy management passenger rail equipment : a thesis submitted by Karina M. Jacobsen
  • Published Date:
    2008-01-31
  • Language:
    English
Filetype[PDF-5.57 MB]


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Collision dynamics modeling of crash energy management passenger rail equipment : a thesis submitted by Karina M. Jacobsen
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  • Alternative Title:
    Collision dynamics modeling of crash energy management passenger rail equipment
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  • NTL Classification:
    NTL-RAIL TRANSPORTATION-Rail Safety ; NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION ; NTL-SAFETY AND SECURITY-Rail Safety ; NTL-SAFETY AND SECURITY-Accidents ;
  • Abstract:
    Crash Energy Management (CEM) is a crashworthiness strategy that

    incorporates crush zones into the design of passenger railcars. In the event of a

    collision, crush zones are engineered to collapse in a controlled manner and

    distribute crush to unoccupied areas throughout a train. This approach manages

    dissipation of the collision energy more effectively and efficiently than conventional

    railcar designs.

    A train-to-train collision scenario is the basis for evaluation of crashworthiness

    in passenger railcars. This thesis uses a three-dimensional model of a CEM

    passenger train to simulate train collisions. The model is evolved in three stages: a

    single car model, a two-car model, and a train-to-train model. The key features

    include crush zones at both ends of the passenger railcars with a pushback coupler,

    suspension characteristics between the trucks and car body, and derailment

    characteristics to approximate the wheel-to-rail interaction. The results of each

    model are compared and validated with data from full-scale impact tests conducted

    for CEM passenger rail equipment.

    The three-dimensional collision dynamics model developed for this thesis serves

    two roles: to explain the events of a CEM train-to-train test and to develop a tool

    for evaluating other collision conditions and equipment variations. The first role is

    accomplished and demonstrated through comparison of results with a full-scale test.

    The second role is accomplished through the documentation and demonstration of

    the features needed to assess other conditions and demands on CEM. The future

    uses of the model include investigation of new designs of CEM equipment and evaluation of crashworthiness performance in more complex collision conditions

    such as oblique impacts and grade crossing collisions.

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