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Outline
Based on the improved Gurney model for explosive acceleration, a planar two-stage strong detonation driving device has been optimized with genetic algorithm. The flyer and the explosive are steel and JO-9159, and the thicknesses of the first and the secondary flyer are 2.5 mm and 0.5 mm, respectively. The maximal velocity of the secondary flyer and the optimized thickness of the explosive are obtained at different velocities of the first flyer from 5.0 km/s to 6.5 km/s. In a similar way, the optimized parameters are also obtained when the flyer's material is aluminium, copper, molybdenum and tantalum, respectively, with a initial velocity of the first flyer of 5.0 km/s. The calculation results can be used in experimental design of planar two-stage strong detonation driving device.
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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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