Technical Reports

Validation of A 70-Ton Higher Speed Freight Truck Design for Operations of up to 125 Mph—Higher Speed Freight Truck Vehicle Dynamics Analysis

  • 06
  • Aug
  • 2015
AUTHOR: Federal Railroad Administration
KEYWORDS: Higher speed freight truck; freight truck dynamics simulations; freight truck for 150 mph operation
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).