United States Department of Transportation
i
Safety Evaluation of High-Speed Rail Bogie Concepts
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2013-10-01
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[PDF-10.22 MB]
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Alternative Title:Safety Evaluation of High-Speed Rail (HSR) Bogie Concepts : Comparative Evaluations of HSR Bogie Design Concepts for Operation Up to 125 Mph
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Abstract:The study defines the basic design concepts required to provide a safe, reliable, high-speed bogie for the next generation PRIIA passenger locomotive. The requirements and conditions for the U.S. market create unique design challenges that currently cannot be addressed by a U.S.-based manufacturer. A global survey identified dominant design trends focused on reducing P2 forces and optimizing bogie stability, curving performance, and ride quality. A likely design configuration with Bo-Bo arrangement was defined for the Task 2 stability analysis. The design of experiments, response surface techniques, and design space method used for the stability analysis demonstrated that a feasible design space of suspension variables could be identified for the conditions evaluated. The coinciding requirements for a higher horsepower engine, Tier 4 emissions, and crashworthiness equipment will add significant weight to the next generation locomotive. In order to meet the P2 limit of 82,000 pounds force at 125 mph, the next generation passenger locomotive will require a frame-hung traction motor, most likely with fully suspended drivetrain, and a disc brake system added to the already existing tread brake and dynamic brake systems. A preliminary safety FMEA concluded the new drivetrain would likely not increase safety risk.
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