爆炸与冲击2024，Vol.44Issue(12)：105-115,11.DOI:10.11883/bzycj-2024-0255
基于自由场爆炸的猪鼓膜破裂规律实验研究
Experimental study on the law of rupture of pig eardrum based on free-field explosion
摘要
Abstract
Mechanical damage to components of the auditory system is the main cause of hearing loss after exposure to blast overpressure waves.There still exist some controversies in high level impulse sound damage risk criteria(DRC).For example,whether average energy or peak overpressure should be used as a main criterion,whether positive duration is important or not,etc.Based on the free-field air explosion,we designed and built a platform for studying blast injuries in large animals.We studied the effect of different explosion parameters on the rupture of the tympanic membrane(TM)and created a relationship between the probability of TM rupture and the dose of the blast wave in terms of peak overpressure and positive duration.The free-field overpressure time history was measured by a pen-shaped pressure sensor.The overpressure time-history curves were fitted by the modified Friedlander equation,thus the peak pressure and positive duration of the blast wave were determined.The impulse pressure energy spectra analysis was performed on the recorded waveforms to determine the signal energy distribution over the frequencies.The degrees of TM rupture of miniature pigs were recorded after dissection under different blast conditions.A two-variable logistic regression was performed on the resulting experimental data for TM rupture risk in terms of peak overpressure and positive duration.The study found that when peak overpressure was lower than 170 kPa,there was no obvious damage to the TM;when peak overpressure was greater than 237 kPa,some of the TMs ruptured or were congested with varying severity.As the distance from the explosion center became smaller,the peak pressure became larger,while the severity of TM damage did not increase monotonically.In the 8.0-kg-TNT equivalent explosion,the severity of TM rupture showed a tendency to increase and then decrease as the distance became smaller.Through the analysis of the blast wave characteristics,we found that the smaller the distance away from the center,the shorter the positive duration and the increase in the high-frequency component of the blast wave.The probability of TM rupture of miniature pigs may decrease,but significant hearing loss and inner ear damage still occur at this time.As a viscoelastic membrane structure that transmits sound through vibration,the dynamic response of the eardrum may be closely related to the frequency spectrum of loads.In addition to the peak pressure,the blast wave waveform may have a significant impact on the degree of TM rupture.关键词
自由场爆炸/冲击波/鼓膜破裂/听力损失/致伤风险Key words
free-field explosion/blast wave/tympanic membrane rupture/hearing loss/damage risk分类
数理科学引用本文复制引用
向书毅,庄茁,柳占立,薛松波,杜智博,赵杨,王兴皓,田旭,高志强,冯国栋,费舟..基于自由场爆炸的猪鼓膜破裂规律实验研究[J].爆炸与冲击,2024,44(12):105-115,11.基金项目
国家重点研发计划(2020-JCJQ-ZD-254,2022YFC3320502) （2020-JCJQ-ZD-254,2022YFC3320502）
