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In order to analyze the attenuation effect of multi-layer bubble film on underwater explosive shock wave, an underwater explosion test was conducted to obtain shock wave parameters with a No. 8 industrial electric detonator as the explosion source. The bubble film was designed with different specifications and different layers of air insulation structure. Furthermore, the shock wave overpressure peak value and specific shock wave energy were compared based on the shock wave parameters. The results show that the attenuation rate of shock wave overpressure peak increases with the increase of bubble film number, with the attenuation rates of 1#, 2#, 3#and 4#bubble film increasing from 48.32%, 86.08%, 87.87% and 90.34% to 89.10%, 91.33%, 91.45% and 92.37%, respectively, which implies that the normal film has less influence on the attenuation of underwater shock wave without air interlayers. Specifically, a larger bubble diameter can reach a better attenuation effect with the same number of layers, which indicates that the bubble plays an important role in attenuating shock waves. In addition, the specific shock wave energy consumption of the bubble film is more than 98.50%. In practical applications, bubble film can be used as a protective material, which can effectively reduce the harmful effects caused by shock waves on the protected objects.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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