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Outline
Using AUTODYN-3D and the Stochastic random fragmentation model which based on the Mott's fragment distribution law, the scattering properties of the warhead fragments are numerically simulated and analyzed under three different ways of initiation including center point initiation, asymmetrical single point initiation and asymmetrical multi-point initiation. The results show that compared with center point initiation, the numbers of random fragments in the target area produced under asymmetrical single point initiation and asymmetrical multi-point initiation are increased by 37.12% and 62.86%, the availabilities of the fragments are improved by 4.01%-6.08%, and the average velocity gains are 25.95% and 28.37% respectively. Furthermore, the effects of the initiation radius on the scattering properties of the random fragments are obtained under asymmetrical initiation. It is shown that the numbers of fragments in the target area, the axial velocity and radial velocity are all reduced with the initiation radius increasing.
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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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