Numerical investigation of vehicle occupant injury risks in underbody blast events

WANG Bo; HE Yangyang; NIE Bingbing; XU Shucai; ZHANG Jinhuan

doi:10.16511/j.cnki.qhdxxb.2020.26.021

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Journal of Tsinghua University(Science and Technology) ›› 2020, Vol. 60 ›› Issue (11) : 902-909. DOI: 10.16511/j.cnki.qhdxxb.2020.26.021

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Numerical investigation of vehicle occupant injury risks in underbody blast events

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Abstract

Landmines and improvised explosive devices have caused many casualties in recent conflicts. A model including the occupant, the vehicle and the explosion flow field was developed to analyze occupant injuries resulting from underbody blast. The fluid-structure coupling algorithm of LS-DYNA was used to simulate the blast effect on the vehicle hull, the transmission path of the blast load and the occupant kinematic response. Head, spine, pelvis and lower extremity injury risks were investigated for 6 kg and 8 kg TNT explosion cases using a finite element human body model. The simulations show that for belted occupants, the ankle-foot complex, tibia and fibula have the highest risk of injury, followed by the pelvis and thoracolumbar spine. These results can be used to design vehicle protection systems to improve occupant safety.

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automotive safety / injury biomechanics / underbody blast / lower extremity / finite element human body model

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WANG Bo, HE Yangyang, NIE Bingbing, XU Shucai, ZHANG Jinhuan. Numerical investigation of vehicle occupant injury risks in underbody blast events[J]. Journal of Tsinghua University(Science and Technology). 2020, 60(11): 902-909 https://doi.org/10.16511/j.cnki.qhdxxb.2020.26.021

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