Experimental Studies of Impact Protection Performance of Aircrew Helmet Typical Component
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摘要: 利用分离式Hopkinson压杆研究了几种航空头盔典型件的冲击保护性能,测量了各构件的能量吸收率.讨论了冲击过程和能量吸收过程,进一步分析了头盔外壳材料力学性能及泡沫衬垫密度对头盔能量吸收率的影响规律.实验表明,在一定范围内外壳力学性能和泡沫衬垫密度对于能量吸收起着重要作用.为设计新一代航空头盔提供了可靠的实验依据.Abstract: The impact protections provided by several aircrew helmet components are investigated in using the SHPB apparatus.The energy absorption rates of these components are examined.The impact process and energy absorption process are discussed.Further,the way in which the material mechanical properties of helmet shell and the density of helmet foam liner affecting the energy absorption capacity of helmet is analyzed,showing that the mechanical properties of shell and the density of foam liner play an important role in the energy absorption process to a certain extent.The experimental method used by this paper is original.This work provides reliable experimental basis for designing a new generation aircrew helmet.
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Key words:
- shocks(mechanics) /
- Hopkinson bars /
- skull /
- aircrew helmet /
- energy absorption rate
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1.SPH4 aircrew helmet impact protection inprovement 1970~1990 final report.AD-A233784,1984 2. Shanahan D F.Injury in U S Army helicopter crashes fiscal years October 1979~September 1985.Journal of Trauma,1989,29(4):415~423 3. 马晓青.冲击动力学.北京:北京理工大学出版社,1992 4. Slobodnik B A.SPH4 helmet damage and head injury correlation.Aviation,Space,and Environmental Medicine,1979,50(2):139~146 5. 赵西寰.SHPB技术的进展.太原工学院学报,1981,(3):102~113 -
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