ASME RT-1 pdf free download
ASME RT-1-2020 pdf free download.Safety Standard for Structural Requirements for Light Rail Vehicles and Streetcars.
ASME RT-1 relies, where practical, on terms already in use by ASME, the American Public Transportation Association (APTA), and the Institute of Electrical and Electronics Engineers (IEEE). For the purposes of this Standard, the following definitions apply:
anticlimber: a structural member or mechanism located at each end of the vehicle used to engage an opposing vehicle, coupled or not, to resist relative vertical travel between the two carbodies during a collision.
articulation: a rotating connection at the intermediate ends of carbody sections to allow negotiation of tracks with various vertical and horizontal profiles.
average collision acceleration: the longitudinal acceleration of each car-module of the vehicle computed using a 100 ms simple moving average over the duration of the collision event and averaged over each car-module.
belt rail: a longitudinal structural member of the carbody located on each side of the carbody below the passenger side windows. The distance between opposite belt rails often establishes the overall width of the carbody, exclusive of the side door thresholds, side cameras, and mirrors.
carbody: the car-module body comprising its main load- carrying structure above all truck suspension units. It includes all components and structural articulation parts that contribute directly to its strength, stiffness, and stability.
car-module: a fully assembled vehicle section that spans between couplers, articulating joints, or a coupler and an articulation. A module may be supported by a truck or may be suspended between two articulations without a truck
collision poses: a set of two structural posts located at each end of the carbody, extending from the bottom of the underframe structure up to the structural shelf. Collision posts may be made of several structural members assembled to each other, provided that the required performance is met. They are located at the approximate one-third points across the width of the vehicle and are forward of the seating position of any passenger or crew person. An alternative to collision posts is a collision wall.
collision wall: a structure at the leading end of the vehicle spanning the area between the structural shelf, corner posts, and top of the underframe.
corner posts: a set of two fuIl.height structural posts located at or near the two corners at one end of the carbody, extending from the bottom of the underframe structure up to the roof structure. Corner posts can be an assembly of several structural members assembled to each other provided that the required performance is met.
coupler system: a system that comprises the coupler head, drawbar, draft gear, and attachments to the carbody, permitting the connection between light rail vehicles or streetcars. The coupler system may be permanently extended in position, or of the folding/retractable type often stored behind a frangible cover or energy absorbing bumper system.
crash enerpj’ management (CEM?: a method of design and manufacture of vehicles that enhances crashworthiness by assigning certain structural members or components of the carbody and the coupler system the task of absorbing a portion of the collision energy in a controlled manner (see energy absorption zone).
crashworthiness: capability of a vehicle structure to protect occupants from injury or fatality in the event of a collision between trains or between trains and obstacles.
end frame: structure inboard of the extreme ends of the vehicle that typically supports the corner posts, collision posts, or collision wall.
end sill compression load (buff load): longitudinal compressive force applied at the ends of the carbody.
energy absorption zone: a zone, typically located at the ends of the vehicle, designed for controlled deformation or crush, while the integrity of the remaining structure outside this zone is maintained.ASME RT-1 pdf download.
