A review of research on the load reduction methods for high-speed water entry of vehicle
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摘要: 航行体高速跨介质入水过程涉及多相流与物体间复杂的流固耦合作用, 航行体面临瞬态冲击载荷极易发生结构损坏。本文围绕高速跨介质航行体入水冲击问题展开了简要叙述, 重点论述了跨介质航行体主被动降载及其他降载方法的研究现状。总结了常见降载方法的优劣, 并阐明了高速跨介质航行体入水降载研究的重点发展方向, 以期为航行体高速跨介质入水载荷特性和降载分析方法的进一步研究提供参考。Abstract: The process of high-speed water entry involves complex fluid-structure coupling between multiple phases, and the vehicle is extremely vulnerable to structural damage in the face of transient shock loads. In this paper, a concise overview of the high-speed transmedia vehicle water impact problem is provided, with a particular focus on the current state of research in the field of active and passive load reduction and other methods for transmedia vehicles. The benefits and drawbacks of common load reduction techniques are analyzed, and the principal research focus of high-speed transmedia vehicle water entry load reduction is outlined, with the aim of providing a reference for the analysis of the vehicle high-speed trans-media water ingress load characteristics and to facilitate further study of the load reduction method.
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Key words:
- transmedia /
- water entry load /
- load reduction
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图 1 航行体高速入水隐患[1]
Figure 1. Hidden dangers of high-speed water entry for navigation bodies
图 3 尾拍运动[4]
Figure 3. Tail slap during water-entry
图 4 跨介质入水尾拍作用导致航行体的弯曲折断过程[11]
Figure 4. The process of bending and breaking the navigational body due to the cross-medium inflow wake effect
图 6 收口状态降落伞流固耦合仿真计算充气外形[18]
Figure 6. Fluid structure coupling simulation calculation of inflatable shape for parachute in closed state
图 8 航行体喷气协助入水[20]
Figure 8. Jet assisted water entry for Vehicle
图 9 不同喷气量下冲击压力对比[27]
Figure 9. Comparison of impact pressure under different jet volumes
图 11 带气囊航行体倾斜落水-上浮过程[32]
Figure 11. The process of inclined descent and ascent of a vehicle with airbags
图 12 带气囊回转体入水试验[34]
Figure 12. Water-entry experiment of a cylinder with airbag
图 13 典型缓冲头帽结构示意图[35]
Figure 13. Schematic diagram of typical buffer head cap structure
图 14 缓冲装置破碎示意图[46]
Figure 14. Schematic diagram of buffer device crushing
图 15 缓冲头帽变形失效过程示意图[47]
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[52]
Figure 16. Comparison of entry of spheres with different surface wettability into water
图 17 超空泡鱼雷示意图[52]
Figure 17. Schematic diagram of supercavitating torpedoes
图 18 跨介质航行体入水的空泡发展过程[56]
Figure 18. Water-entry cavity development of the trans-media vehicle
图 19 不同头型产生的超空泡形态[63]
Figure 19. Supervoid morphology generated by different head shapes
图 20 鸟类入水过程[72]
Figure 20. The process of birds entering water
图 21 装备弹性缓冲器射弹模型[78]
Figure 21. Equipment elastic buffer projectile model
图 22 球体串联入水试验[84]
Figure 22. Water entry experiments with tandem spheres
图 23 多级降载装置降载机理示意图[85]
Figure 23. Mechanism of multi-stage load reduction structure
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