爆炸与冲击2024，Vol.44Issue(12)：72-81,10.DOI:10.11883/bzycj-2024-0211
底部爆炸冲击下乘员脊柱的损伤行为和风险分析
Analysis of occupant spinal injury behavior and risk induced by under-body blast impacts
摘要
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.关键词
底部爆炸/脊柱损伤/人体模型/生物力学Key words
under-body blast/spinal injury/human body model/biomechanics分类
数理科学引用本文复制引用
李桂兵,李文博,汪国胜,覃凌云,蔡志华..底部爆炸冲击下乘员脊柱的损伤行为和风险分析[J].爆炸与冲击,2024,44(12):72-81,10.基金项目
基础加强计划技术领域基金(2021-JCJQ-JJ-1309) （2021-JCJQ-JJ-1309）
湖南省自然科学基金(2023JJ30246) （2023JJ30246）
