Journal
INTERNATIONAL JOURNAL OF RAIL TRANSPORTATION
Volume 8, Issue 3, Pages 215-233Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/23248378.2019.1636318
Keywords
Railway crashworthiness; secondary collision; impact biomechanics
Categories
Funding
- Fundacao para a Ciencia e a Tecnologia [UID/EMS/00667/2019, UID/EMS/50022/2019]
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A validated framework developed to analyse railway occupant safety is presented here. The inexistence of restraints and the larger distance between contact features for the railway cabin interior decreases the predictability on the kinematics of its occupants. Simulation results are evaluated considering the severity of the injuries, assessed and quantified using the relevant criteria. It was introduced a head padding that conducted to a reduction of the Head Injury Criterion (HIC) but worsening the value of neck-bending moment in extension (NBME). Finally, the multi-objective optimization procedures are applied to achieve a relevant reduction in injuries. With the implementation of a pad with 42 mm thickness and with a reduction of 8.2% of the backseat plate thickness, is obtained a 41% reduction of the HIC but at the cost of an increase of 49% of the NBME index, though this design allows keeping all injury indices below moderate threshold value.
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