New York City Transit Rail Vehicle Qualification

SGH developed a conceptual design to incorporate crush elements in the end frame that will help control collapse of the carbody’s end. Highlights of our work include:

• Developing finite element models to evaluate carbody static, fatigue, and natural frequency load cases and the required train-to-train crash analyses
• Performing scoping analyses to determine appropriate crash energy distributions for a ten-car assembly, including preliminary stress analyses for the primary static load cases
• Adapting the three-dimensional models to incorporate the CEM design
• Supporting testing of a prototype structure, including crush testing conducted on individual full-scale CEM components and dynamic impact testing conducted on an endframe representing the CEM system and its support on the carbody
• Developing required project documentation to help Hyundai Rotem qualify their design for use in New York City’s transit system
• Advising and helping Hyundai Rotem interact with NYCT and their engineers to efficiently navigate the qualification program