Design of Mechanics-Guided Helmet Pad and Its Protection Performance Against the Blast Shock Waves

IF 2.2 4区医学 Q3 ENGINEERING, BIOMEDICAL

International Journal for Numerical Methods in Biomedical Engineering Pub Date : 2024-11-12 DOI:10.1002/cnm.3882

Zhidong Wang, Shuhuai Duan, Wenhang Liu, Yongtao Lu, Chengwei Wu, Guojun Ma

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引用次数: 0

Abstract

The blast shock waves generated by the explosion are severe threat to soldiers on the battlefield, while the helmets currently equipped for the soldiers cannot offer sufficient blast protection. Some helmet pads have been developed to improve the protection performance of the combat helmets against shock waves. However, it remains unclear how to design the helmet pads to protect the head more effectively against blast shock waves. This study aims to design a new mechanics-guided helmet pad and evaluate its protection performance by numerical simulations. The design of the new helmet pad is guided by the oblique reflection theory (ORT), and the advanced combat helmet (ACH) pad is applied for comparison. The protection performance of the pads against blast waves from two directions (frontal and lateral) was investigated. The differences in the distributions of overpressure inside the helmet using two types of pads were analyzed, and the intracranial pressure (ICP) of head was compared. The ORT-guided pads can reduce the overpressure inside the helmet, minimizing the possibility of blast-induced traumatic brain injury. Furthermore, the underwash phenomenon can also be controlled when the new pads are applied. The results in this study provide an important theoretical basis and some guidelines on the design of helmet pads for the protection of human brain from blast shock waves.

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机械制导头盔护垫的设计及其对爆炸冲击波的防护性能。

爆炸产生的冲击波对战场上的士兵构成严重威胁，而目前为士兵配备的头盔无法提供足够的防爆保护。为了提高作战头盔对冲击波的防护性能，人们开发了一些头盔护垫。然而，如何设计头盔衬垫以更有效地保护头部免受爆炸冲击波的伤害，目前仍不清楚。本研究旨在设计一种新型力学导向头盔垫，并通过数值模拟评估其防护性能。新型头盔护垫的设计以斜反射理论（ORT）为指导，并采用先进战斗头盔（ACH）护垫进行比较。研究了头盔垫对来自两个方向（正面和侧面）的爆炸波的防护性能。分析了使用两种衬垫时头盔内超压分布的差异，并比较了头部的颅内压（ICP）。结果表明，ORT 引导衬垫可降低头盔内的超压，最大限度地减少爆炸诱发脑外伤的可能性。此外，在使用新衬垫时，还可以控制欠冲现象。本研究的结果为保护人脑免受爆炸冲击波伤害的头盔衬垫设计提供了重要的理论依据和一些指导原则。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal for Numerical Methods in Biomedical Engineering ENGINEERING, BIOMEDICAL-MATHEMATICAL & COMPUTATIONAL BIOLOGY

CiteScore

4.50

自引率

9.50%

发文量

103

审稿时长

3 months

期刊介绍： All differential equation based models for biomedical applications and their novel solutions (using either established numerical methods such as finite difference, finite element and finite volume methods or new numerical methods) are within the scope of this journal. Manuscripts with experimental and analytical themes are also welcome if a component of the paper deals with numerical methods. Special cases that may not involve differential equations such as image processing, meshing and artificial intelligence are within the scope. Any research that is broadly linked to the wellbeing of the human body, either directly or indirectly, is also within the scope of this journal.