Higher speed freight truck : vehicle dynamics analysis.
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Higher speed freight truck : vehicle dynamics analysis.

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  • Abstract:
    Previously, Sharma & Associates, Inc. (SA) developed a higher speed freight truck design under sponsorship of the Federal

    Railroad Administration. Under the current contract, SA was tasked with developing performance requirements for higher speed

    freight trucks, as well as conducting structural and dynamics simulations in accordance with the performance specifications

    developed in the earlier task components of this project. This report presents the vehicle dynamics analyses of the truck. These

    analyses follow the performance requirements laid out for this project in a report titled “WBS TASK 1.1, Higher Speed Freight

    Truck – Performance Requirements.” The requirements were based on the approach presented in FRA’s Notice of Proposed

    Rulemaking (NPRM) on Vehicle/Track Interaction Safety Standards; High-Speed and High Cant Deficiency Operations published

    on May 10, 2010. The vehicle dynamics simulations were conducted at speeds between 95 to 130 mph in 5 mph increments on

    Class 7 track, as well as for 115 mph on a Class 6 track. The simulations showed that the higher speed freight truck meets all

    previously specified performance criteria. Based on the results discussed in this report, it is recommended that a set of field tests

    be carried out to evaluate and validate the higher speed freight truck’s performance under Chapter 11 regimes. Further tests

    should be run at speeds 100 mph or higher at a facility such as Transportation Technology Center, Inc. (TTCI).

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