保护厚度对上肢冲击力模拟在战斗体育和自卫中的影响
Vaclav Beranek1,2, Petr Stastny2, Bogdan Bacik3
1Department of Rehabilitation Fields, Faculty of Health Care Studies, University of West Bohemia, Pilsen, Czech Republic.
Journal of human kinetics
|November 20, 2024
概括
保护性泡层显著降低了战斗运动中的冲击力. 更厚的泡层和多层提供更好的保护,但性能可能会随着重复的高能冲击而下降.
科学领域:
- 运动工程 运动工程
- 材料科学 材料科学 材料科学
- 生物力学 生物力学
背景情况:
- 防护材料的性能对于减轻战斗运动中的打击力至关重要.
- 了解能量吸收能力是设计有效防护装备的关键.
研究的目的:
- 为了评估保护层厚度在模拟上肢冲击时对净力的影响.
- 评估重复加载对保护材料阻尼性能的影响.
主要方法:
- 使用下降的8公斤重量来模拟不同高度 (15,25,50厘米) 的冲击力.
- 测试了Trocellen泡的三个厚度 (1.8厘米,3.6厘米,5.4厘米).
- 转移线性回归分析了测量和未减压力之间的关系;在30 J的能量吸收下研究了重复加载效应.
主要成果:
- 与动力设计相比,增加泡层 (1,2,或3) 增加了未压力的约2.8,6.1和11.1倍,分别是动力设计 (p < 0.05,R2 ≥ 0.95).
- 在相同的吸收能量下,在重复加载条件下减缓性能下降.
- 对于高冲击场景,单一的泡层可能不足,因为泡的潜在紧缩 (>80%的压缩,>5kN的力).
结论:
- 保护层厚度和层数量是管理冲击力的关键因素,以确保运动员的安全.
- 研究人员可以利用这些发现来根据特定的安全要求选择合适的保护层配置.
- 需要对单层保护可能由于材料疲劳而危及安全的高冲击情况进行进一步调查.
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