A Countermeasure to Reduce Secondary Impact Velocity and Rib Deflection Criterion of Longitudinal‐Seat Passengers in Railway Collisions

Railway passengers are not usually provided with safety seat‐belts, which means they can be thrown forward in the event of a frontal collision. Passengers sitting on longitudinal seats could be projected a significant distance and could collide, at high velocity, with the interior train structures. Based on sled tests simulated by using UK Railway Group Standards GM/RT2100, a previous study applied acceleration pulses to passengers and found that the most severe injuries occurred to passengers seated in the second and third position, nearest to the bench‐end partition. Other studies claim that a higher Secondary Impact Velocity (SIV) correlates positively with the more severe passenger injuries. Therefore, reducing the SIV is vital in order to decrease the severity of injuries to passengers in general. Numerical simulations are useful for obtaining effective case studies concerning the behavior of passengers, by transferring and leaning them to the bench‐end partition. In 2015, the authors proposed a numerical simulation method to reproduce sled tests for passengers seated at the third position from the bench‐end partition. In this method, although the Head Injury Criterion (HIC) was overestimated due to the vibration of the head acceleration, the error of the SIV was below 3%. In 2016, the authors highlighted the influence of distance from the bench‐end partition and the input acceleration on the SIV for one passenger. The present study uses this method to examine how the friction of the longitudinal seats and the presence of the handrail affect the behavior of the passengers. The purpose of this study is to investigate the effect of reducing the SIV and the Rib Deflection Criterion (RDC) through use of the handrail, including two passengers.

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    • Abstract reprinted with permission of the International Council on the Biomechanics of Injury (IRCOBI).
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    International Research Council on Biomechanics of Injury (IRCOBI)

    Winkelriedstrasse 27
    Zurich,   Switzerland  CH-8006
  • Authors:
    • Suzuki, Daisuke
    • Nakai, Kazuma
    • Enami, Shota
    • Palacin, Roberto
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  • Publication Date: 2017


  • English

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  • Accession Number: 01648680
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 23 2017 9:36AM