振动环境下头盔对飞行员椎间盘生物力学响应影响  

Effects of Helmet on Biomechanical Responses of Pilot’s Intervertebral Disc under Vibration Environment

作　　者：刘景龙 徐鹏[1,2] 王丽珍[1,2,3] 樊瑜波[1,3,4] LIU Jinglong;XU Peng;WANG Lizhen;FAN Yubo(Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education,Beijing Advanced Innovation Center for Biomedical Engineering,School of Biological Science and Medical Engineering,Beihang University,Beijing 100191,China;Innovation Center for Medical Engineering&Engineering Medicine,Hangzhou International Innovation Institute,Beihang University,Hangzhou 311115,China;State Key Laboratory of Virtual Reality Technology and Systems,Beihang University,Beijing 100191,China;School of Engineering Medicine,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学生物力学与力生物学教育部重点实验室,北京市生物医学工程高精尖创新中心,生物与医学工程学院,北京100191 [2]杭州市北京航空航天大学国际创新研究院(北京航空航天大学国际创新学院)医工交叉科创中心,杭州311115 [3]北京航空航天大学虚拟现实技术与系统全国重点实验室,北京100191 [4]北京航空航天大学医学科学与工程学院,北京100191

出　　处：《医用生物力学》2024年第6期1050-1057,共8页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(“叶企孙”科学基金项目)(U2241273)。

摘　　要：目的探究振动环境下头盔对飞行员椎间盘响应的影响。方法基于人体颈椎计算机断层扫描图像,建立C5~6颈椎节段的多孔介质有限元模型。对验证后的模型施加A、B、C头盔和无头盔4种工况载荷,开展时长3600 s振动分析,考虑振动频率影响,得到髓核和基质的最大多孔压力与最大主应力。结果在同一振动频率下,髓核和基质的最大多孔压力逐渐降低并趋于平稳,髓核和基质最大多孔压力曲线在B头盔情况下最高,C、A头盔次之,无头盔最小。B头盔情况下髓核的最大主应力曲线高于C、A头盔和无头盔。在5、9 Hz振动频率下,不同头盔作用时基质的最大主应力随时间增加,在约1200 s后逐渐接近且趋于稳定。同一头盔情况下,在加载1200~2400 s后,髓核在9 Hz下最大主应力曲线高于5、1 Hz曲线。基质在9、5 Hz下的最大主应力曲线接近,均高于1 Hz情况。结论不同头盔对椎间盘内髓核和基质多孔压力有显著影响,振动频率的升高导致基质的最大主应力增加。Objective To evaluate the effect of helmet on biomechanical responses of pilot’s intervertebral disc under vibration environment.Methods A porous media finite element model of C5-6 segment was established based on the computed tomography(CT)images of an adult.Four loading conditions(A,B,C helmets and No helmet)were applied to the validated model with a duration of 3600 s for vibration analysis.Considering the effects of vibration frequency,the maximum porous pressure(MPP)and maximum principal stress(MPS)of nucleus pulposus(NP)and annulus substance(AS)were obtained.Results The MPP of NP and AS decreased and became stable under the same vibration frequency.The MPS of NP and AS for B helmet was the maximum,followed by C helmet,A helmet and No helmet.The curve of MPS for B helmet was higher than that of C helmet,A helmet and No helmet.At the vibration frequency of 5 Hz and 9 Hz,the MPS of AS under four helmet conditions increased with time,and reached a constant value after 1200 s.Under the same helmet condition,after loading for 1200-2400 s,the MPS of NP at 9 Hz vibration frequency was higher than that at 5 Hz and 1 Hz.The MPS of AS at 9 Hz and 5 Hz was close to each other,and both were higher than that at 1 Hz.Conclusions The helmet has an important effect on the MPP of NP and AS,and the increase of vibration frequency will lead to the increase of the MPS of AS.

关 键 词：振动载荷 飞行员 颈部损伤 椎间盘退化 多孔介质建模 多孔压力 

分 类 号：R318.01[医药卫生—生物医学工程]