A study of blast wave protection efficiency of helmet based on air flow field pressure analysis

ZHANG Wenchao; WANG Shu; LIANG Zengyou; QIN Bin; LU Haitao; CHEN Xinyuan; LU Wenjie

doi:10.11883/bzycj-2021-0411

Volume 42 Issue 11

Nov. 2022

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ZHANG Wenchao, WANG Shu, LIANG Zengyou, QIN Bin, LU Haitao, CHEN Xinyuan, LU Wenjie. A study of blast wave protection efficiency of helmet based on air flow field pressure analysis[J]. Explosion And Shock Waves, 2022, 42(11): 113201. doi: 10.11883/bzycj-2021-0411

Citation:

ZHANG Wenchao, WANG Shu, LIANG Zengyou, QIN Bin, LU Haitao, CHEN Xinyuan, LU Wenjie. A study of blast wave protection efficiency of helmet based on air flow field pressure analysis[J]. Explosion And Shock Waves, 2022, 42(11): 113201. doi: 10.11883/bzycj-2021-0411

Citation:

ZHANG Wenchao, WANG Shu, LIANG Zengyou, QIN Bin, LU Haitao, CHEN Xinyuan, LU Wenjie. A study of blast wave protection efficiency of helmet based on air flow field pressure analysis[J]. Explosion And Shock Waves, 2022, 42(11): 113201. doi: 10.11883/bzycj-2021-0411

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A study of blast wave protection efficiency of helmet based on air flow field pressure analysis

doi: 10.11883/bzycj-2021-0411

1.
College of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Science and Technology on Transient Impact Laboratory, No.208 Institute of China Ordnance Industries, Beijing 102202, China
3.
Unit 93320 of PLA, Qiqihar 161000, Heilongjiang, China
4.
Henan North Hongyang Electromechanical Co. Ltd., Nanyang 473000, Henan, China

Received Date: 2021-09-28
Rev Recd Date: 2022-03-25

Available Online: 2022-03-30

Publish Date: 2022-11-18

Abstract

Abstract

To study the protective effect of a typical combat helmet against traumatic brain injury induced by blast wave, an anti-explosion test was first carried out, in which 50 g TNT was used to produce blast wave acting on a head model with or without helmet protection located at 1m away from explosion position. Pressure sensors were installed on the forehead, cranial, parietal and postcranial of the head model, while the front end of each sensor was in touch with the surface of the head model. Secondly, based on the 3rd Military Medical University’s visualization body slice data set (CVH), a finite element model with the typical head structure was established. The head of the finite element model contained skin, skull, cranial, cerebrospinal fluid, brain tissue, dura mater and pia mater. All the membrane structures are meshed into quadrilateral shell elements, while the remaining parts are all meshed into cubic solid elements. The finite element model of the head is then loaded by the blast wave, and the experimental conditions are simulated by the display dynamic analysis software of LS-DYNA. The validity of the simulation model is verified by the test results. Next, the pressure variation of the blast wave flow field under different working conditions is analyzed by numerical simulation, meanwhile the effect of foam liner on helmet protection capability is studied. The results show that the typical combat helmet can attenuate the frontal air overpressure to 54.5% of that without helmet protection, but it would enhance the air overpressure on the posterior cranial to 2.19 times that without protection, which harms the protection of posterior cranial. The foam padding in helmet suspension can reduce the negative effect of the helmet on cranial posterior protection and improve the protective ability of the helmet against the blast wave. The results also show that the auricle structure amplifies the overpressure of the blast wave to 1.7 times the free field in the same position under the frontal blast wave, which is an important target organ of blast wave action.
- blast wave,
- combat helmet,
- air flow field pressure,
- protection,
- numerical simulation

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References(25)

References

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