Research on Impact Characteristics of High Speed Vertical Water Entry of an Axisymmetric Body
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摘要: 回转体入水过程不仅影响其运动轨迹，而且将引起回转体壳结构以及内部元器件的动态响应。本文利用大型商用软件MSC.dytran数值模拟技术，对圆盘尖拱头型回转体最危险的入水状态，即垂直入水过程进行了数值仿真，得到了此回转体垂直入水的冲击特性，以及垂直入水初期的弹道特性、轨迹与入水超空泡。分析结果将对此回转体头部壳体强度设计、提高抗冲击性能、入水弹道设计以及水中布放位置研究都具有重要的参考价值。Abstract: Water entry of an axisymmetric body affects its trajectory, and causes dynamic response of the shell structure and internal components. In this paper, the numerical simulation technology in the large commercial software MSC.dytran is used to simulate the most dangerous vertical water entry of a disk-ogive head axisymmetric body . Hence, the impact and trajectory characteristics and the track of a vertical water entry are achieved. In addition, the early supercavitation phenomenon is simply reviewed. This study may contribute to the design of an axisymmetric body′s head shell for enhancing its resistance of impact, the design of water entry trajectory, and the location of the axisymmetric body.
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Key words:
- axisymmetric body /
- water entry trajectory /
- over load /
- supercavitation /
- impact characteristics /
- dynamic response
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