Review of the Development on Load Reduction Methods for Water Entry of High-Speed Vehicles
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摘要: 跨介质航行器高速入水过程涉及多相流场与物体间复杂的流固耦合作用, 航行器面临瞬态冲击载荷极易发生结构损坏。文中综述了目前国内外跨介质航行器高速入水载荷特性和降载方法的研究进展, 总结了常见降载方法并分析其优劣, 提出了未来跨介质航行器高速入水降载研究的重点发展方向。Abstract: The water entry process of high-speed vehicles involves complex fluid-structure interaction between multiple phase flows and vehicles, which can result in transient impact loads and potential structural damage. In this paper, a brief description of the high-speed water entry impact problem for vehicles is provided, with a focus on the current development of active and passive load reduction methods for vehicles. Additionally, the paper provides a summary of the advantages and disadvantages of common methods for reducing water entry loads, and elucidates the key research directions for reducing water entry loads of vehicles, aiming to provide a reference for further study on the characteristics of water entry loads and the load reduction methods of vehicles at high speeds.
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Key words:
- trans-medium vehicle /
- water entry load /
- load reduction
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图 1 航行器高速入水隐患
Figure 1. Hidden dangers of high-speed water entry for navigation bodies
图 2 典型航行器入水冲击载荷特征
Figure 2. Characteristics of impact load on typical navigation bodies entering water
图 4 跨介质入水尾拍作用导致的航行器弯曲折断过程
Figure 4. The process of bending and breaking the navigational body due to the trans-medium tail beat effect
图 6 收口状态降落伞充气外形流固耦合仿真计算
Figure 6. Fluid-structure coupling simulation calculation of inflatable shape for parachute in closed state
图 7 开伞减速入水时被拦截的航行器
Figure 7. The intercepted vehicle during parachute deceleration into the water
图 10 气囊装置在实际工程中的应用
Figure 10. The application of airbag devices in practical engineering
图 11 带气囊航行器倾斜入水－上浮过程
注: T*为无量纲时间数, T*=Vt/L, V为弹体尾部触水时的速度, t为实际时间, L为弹体长度
Figure 11. The process of inclined water entry and ascent of a vehicle with airbags
图 15 缓冲头帽变形失效过程示意图
Figure 15. Schematic diagram of deformation and failure process of buffer head cap
图 16 不同表面润湿性球体入水对比
Figure 16. Comparison of entry of spheres with different surface wettability into water
图 18 跨介质航行器入水空泡发展过程
Figure 18. Water-entry cavity development of the trans-medium vehicle
图 19 不同头型产生的超空泡形态
Figure 19. Supercavity morphology generated by different head shapes
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