Experimental study on the law of rupture of pig eardrum based on free-field explosion

XIANG Shuyi; XUE Songbo; DU Zhibo; ZHAO Yang; WANG Xinghao; TIAN Xu; GAO Zhiqiang; FENG Guodong; FEI Zhou; ZHUANG Zhuo; LIU Zhanli

doi:10.11883/bzycj-2024-0255

Volume 44 Issue 12

Dec. 2024

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Article Navigation > Explosion And Shock Waves > 2024 > 44(12): 121431

XIANG Shuyi, XUE Songbo, DU Zhibo, ZHAO Yang, WANG Xinghao, TIAN Xu, GAO Zhiqiang, FENG Guodong, FEI Zhou, ZHUANG Zhuo, LIU Zhanli. Experimental study on the law of rupture of pig eardrum based on free-field explosion[J]. Explosion And Shock Waves, 2024, 44(12): 121431. doi: 10.11883/bzycj-2024-0255

Citation:

XIANG Shuyi, XUE Songbo, DU Zhibo, ZHAO Yang, WANG Xinghao, TIAN Xu, GAO Zhiqiang, FENG Guodong, FEI Zhou, ZHUANG Zhuo, LIU Zhanli. Experimental study on the law of rupture of pig eardrum based on free-field explosion[J]. Explosion And Shock Waves, 2024, 44(12): 121431. doi: 10.11883/bzycj-2024-0255

Citation:

XIANG Shuyi, XUE Songbo, DU Zhibo, ZHAO Yang, WANG Xinghao, TIAN Xu, GAO Zhiqiang, FENG Guodong, FEI Zhou, ZHUANG Zhuo, LIU Zhanli. Experimental study on the law of rupture of pig eardrum based on free-field explosion[J]. Explosion And Shock Waves, 2024, 44(12): 121431. doi: 10.11883/bzycj-2024-0255

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Experimental study on the law of rupture of pig eardrum based on free-field explosion

doi: 10.11883/bzycj-2024-0255

1.
School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
2.
Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
3.
Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
4.
Xijing Hospital, Air Force Medical University, Xi’an 710032, Shaanxi, China

Received Date: 2024-07-24
Rev Recd Date: 2024-09-23

Available Online: 2024-10-08

Publish Date: 2024-12-01

Abstract

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.
- free-field explosion,
- blast wave,
- tympanic membrane rupture,
- hearing loss,
- damage risk

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References

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