Feasible Region Programming Method and Analysis of Influential Factors for Design of Torpedo Nose Cap
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摘要: 为进一步研究鱼雷头罩入水破坏机制和理论设计方法, 通过鱼雷头罩空中承载及入水冲击过程动力学分析, 建立了可行域规划方法。对特定设计边界的鱼雷头罩进行了入水运动学分析、可行域规划、影响因素分析和入水试验验证。研究表明, 可行域规定了鱼雷头罩力学设计的物理边界, 可较好地表征、求解鱼雷头罩的理论设计问题。空中飞行速度和正切尖拱的长径比是鱼雷头罩可行域规划的主要影响因素, 其中, 空中飞行速度决定着可行域的临界入水速度和可行域宽度, 尖拱长径比对可行域宽度有显著影响。Abstract: A feasible region programming method for designing frangible nose cap with tangent ogive is established by analyzing the aerodynamic loading in the air and the impulsive loading during water entry process. The method is employed to investigate the impact dynamics of a nose cap at water entry and the feasible region design with given boundary conditions. Furthermore, water-entry experiments of the nose cap are conducted. The results indicate that the feasible region defines the theoretical boundary of nose cap structure, the flight speed in the air determines the critical water-entry velocity in feasible region and the width of the region, and the ogive's length-to-diameter ratio has significant influence on the width of feasible region.
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Key words:
- torpedo nose cap /
- feasible region design /
- programming method /
- water-entry experiment
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