Analysis of occupant spinal injury behavior and risk induced by under-body blast impacts

LI Guibing; LI Wenbo; WANG Guosheng; QIN Lingyun; CAI Zhihua

doi:10.11883/bzycj-2024-0211

Volume 44 Issue 12

Dec. 2024

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Article Navigation > Explosion And Shock Waves > 2024 > 44(12): 121422

LI Guibing, LI Wenbo, WANG Guosheng, QIN Lingyun, CAI Zhihua. Analysis of occupant spinal injury behavior and risk induced by under-body blast impacts[J]. Explosion And Shock Waves, 2024, 44(12): 121422. doi: 10.11883/bzycj-2024-0211

Citation:

LI Guibing, LI Wenbo, WANG Guosheng, QIN Lingyun, CAI Zhihua. Analysis of occupant spinal injury behavior and risk induced by under-body blast impacts[J]. Explosion And Shock Waves, 2024, 44(12): 121422. doi: 10.11883/bzycj-2024-0211

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Analysis of occupant spinal injury behavior and risk induced by under-body blast impacts

doi: 10.11883/bzycj-2024-0211

1.
School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China
2.
Department of Vehicle Chassis, China North Vehicle Research Institute, Beijing 100072, China
3.
Hunan Provincial Key Laboratory of Health Maintennance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China

Received Date: 2024-07-01
Rev Recd Date: 2024-10-30

Available Online: 2024-10-31

Publish Date: 2024-12-01

Abstract

Abstract

The impact from under-body blast (UBB) can easily cause spinal injuries to armored vehicle occupants. In order to comprehensively understand the injury behavior and risk of different spine segments of the occupant under UBB impacts, numerical simulations using a high biofidelity human body finite element model were conducted to simulate the dynamic response process of the occupant spine under typical UBB impacts. Then kinematic, dynamic, and biomechanical response were integrated to study the potential injury behavior of each segment of the spine, and biomechanical indicators were used to analyze spinal injury risk under different loading conditions and protective seat design parameters. The results indicate that: the over extension of the C4–T3 segments is the main reason for injuries to the spinous process, transverse process, and intervertebral disc annulus fibrosus; injuries of the T7–T12 segments are mainly associated with the forward over bending combined with axial compression; the axial compression of the lumbar spine results in a high injury risk at the anterior aspect of the vertebral body and the nucleus pulposus of the intervertebral disc; the risk of spinal segment injury increases with the increase of peak load acceleration, and the risk of thoracolumbar spine injury under anti-blast seat protection is lower, but there is a high risk of cervical spine fracture; reducing the stiffness of the seat suspension can reduce the risk of spinal injury for occupants, but changing the damping parameter of the seat suspension in the range of 0.6−1.2 kN·s/m has no significant effect on the spinal injury risk of occupants.
- under-body blast,
- spinal injury,
- human body model,
- biomechanics

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References

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