SAFETY EQUIVALENCE OF APTA 8G AND GMRT 5G SEAT TESTS BASED ON HUMAN INJURY
The Federal Railroad Administration sponsored research conducted at the Volpe National Transportation Systems Center aimed to assess the safety equivalence of the passenger rail seat dynamic test requirements specified in the United States American Public Transportation Association (APTA) and Great Britain Group Mechanical/Rail Traction (GMRT) safety standards. In this study, Volpe researchers used finite element simulations to replicate crash tests with forward-facing commuter rail passenger seats and two Hybrid-III 50th percentile male (H3-50M) anthropomorphic test devices (ATDs). The researchers conducted this study to address questions on the safety equivalency of the crash pulses specified in the two safety standards and the different requirements for injury criteria. Notably, the APTA seat standard uses a triangular 8g crash pulse, while the GMRT safety standard uses a less-severe trapezoidal 5g crash pulse. This study showed evidence for safety equivalency of the forward-facing injury seat tests from APTA and GMRT based on human injury results.