爆炸冲击波致颅脑损伤数值模拟

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中图分类号：0383 国标学科代码：13035 文献标志码：A

Abstract：Inmilitaryoperations，industrialaidentsandother explosiveevents，head injuriescausedbyblastshockwaves have becomeoneof themain injury forms of injury，butthe injury mechanismanddamage thresholdhavenotbeenclarified yet.Inthis paper，numericalsimulationisused tostudythedynamicresponseproessoftheheadunderexplosionload，andthe efects of TNT charge，airand water media on the deformation，pressure and aceleration of the cranium and brainare analyzed.First，theair-eadfluid-structure interactionmodelisestablishedusingEuler-Lagrangiancouplingmethod.Basedon thevalidationofitseectiveness，tedynamicesponseprocessoftheeadwasanalyedintsofpressure，accelerationand frequencyof the prefrontal cranium and brain tisse.Byseting theinitial conditions andboundaryconditions，the ffectsof frontalandthebehindshockloadingsoftheblast waveonthehead weresimulated.Ithasbeenfoundthattheheadtissue vibratesat high frequencies，up to 7kHz ，whenthe blast wave strikesthe head directly.The acceleration on the prefrontal craniumandbraintissuehadalarge value initiallyandbecomesmallinthelatestage，whilethe intracranial pressurevaried in a cyclical manner.In the underwater environment， tere were high-frequency periodic overpressre fluctuations inthe brain tissues of frontal，parietal and temporal lobes，in which peak overpressure of 3.64MPa can be generated in the prefrontal cranium，which is well above the threshold of 235kPa for severe brain injury. In water， brain tissue is subjected to 5 times the peak pressure，a5foldincreaseinaccelerationanda2fold increaseinfrequencycomparedtothose inair.Theresultsof this research provide a new perspective for understanding the mechanism of damage to the human brain caused by blast shock waves，and an reference for the development of future protective measures.

Keywords：blast shock waves; head finite element model; brain injury;underwater explosion

在现代战争的新形态中，军事行动和恐怖主义行为呈现出多样化和复杂化的特点，简易爆炸装置已成为现代冲突中常见的战术手段，这导致爆炸冲击波引起的人体损伤显著增加。（剩余19492字）