derailments, low-speed curving performance, multi-body simulations, rail vehicle dynamics, suspension, track twist, warp, wheel climb, wheel load equalization, wheel unloading

Summary

This standard defines vehicle and track conditions to evaluate the ability of passenger equipment to resist wheel climb derailments when operating at low speeds over track curves with high-degree of curvature. The methodology in this standard shall be used for simulations conducted using industry-accepted rail vehicle dynamics software.

APTA PR-M-S-015-06,  “Wheel Flange Angle for Passenger Railroad Rolling Stock”