Effects of Helmet on Biomechanical Responses of Pilot's Intervertebral Disc under Vibration Environment
10.16156/j.1004-7220.2024.06.006
- VernacularTitle:振动环境下头盔对飞行员椎间盘生物力学响应影响
- Author:
Jinglong LIU
1
;
Peng XU
;
Lizhen WANG
;
Yubo FAN
Author Information
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;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
- Publication Type:Journal Article
- Keywords:
vibration load;
pilot;
neck injury;
intervertebral disc degeneration;
porous media modelling;
porous pressure
- From:
Journal of Medical Biomechanics
2024;39(6):1050-1057
- CountryChina
- Language:Chinese
-
Abstract:
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 3 600 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 1 200 s.Under the same helmet condition,after loading for 1 200-2 400 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.
