PDF
Full
Outline
Storm is an important threat to deep-sea mining operations. To assess this risk, asimulation and analysis model of the deep-sea mining riser system was established in this paper and the mechanical performance of mining riser system under a storm environment was analyzed. The safety of storm-resistant and storm-avoidance operations was evaluated. The speed envelope for storm evacuation was calculated and an optimization algorithm for calculating operation envelopes was developed. The results show that the mining riser system is very dangerous under stormy sea conditions, and the weak point is near the rigid pipe's suspension position. The vertical oscillation of the transfer tank is more significant than lateral oscillation in storm environments, and the fluctuation amplitude of the force exerted by the hose on the mining vehicle is not significant. During the storm avoidance evacuation process, the upper rotation is the limiting factor affecting the evacuation speed, and the maximum permitted speed occurs in the downstream direction, while the minimum occurs in the countercurrent direction. In the evacuation process, the horizontal force exerted by the hose on the mining vehicle is greatly affected by the speed. The optimization algorithm proposed in this paper can greatly reduce the calculation time of the operation envelope.
PDF
154
74
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
