环肋圆柱壳是深潜器耐压结构的主要形式，但由于极限承载能力和振动特性的需求，存在不同的环肋布局形式。为探究环肋布局对钛合金圆柱耐压壳内爆的影响，基于任意拉格朗日欧拉方法开展数值研究。首先对比试验结果验证液-固-气三相流固耦合数值模型的准确性。然后分析3种环肋布局下圆柱耐压壳水下内爆过程中的结构动态响应、冲击波传播以及能量演化等特征。结果表明，环肋均布时，内爆中心由筒体中部向一端移动。而中部和端部加强时，内爆中心由环肋稀疏位置向密集位置移动，结构动能均存在显著的二次波峰现象。此外，中部加强能有效降低最大冲击波峰值。通过对环肋圆柱壳内爆响应特性的分析，对深海耐压结构的设计具有重要的工程意义。
Ring-stiffened cylindrical shell is the main type of pressure hull for deep-sea submersible vehicles, but there are different ring-stiffener layouts due to the requirements of ultimate bearing capacity and vibration characteristics. In order to investigate the effect of ring-stiffener layout on the implosion of cylindrical pressure hull, numerical research is carried out based on the arbitrary Lagrange Euler method. Firstly, the accuracy of the fluid-structure interaction numerical model of liquid-solid-gas is verified by comparing the results of test. Then, some characteristics such as the dynamic response of structure, the propagation of shock wave and the evolution of energy in the process of underwater implosion under three kinds of ring-stiffener layout are investigated. The results show when the ring-stiffeners are uniformly distributed, the implosion center moves from the middle of the cylinder to one end. However, when the middle and end of the cylinder are strengthened, the implosion center moves from the sparse position to the dense position of ring-stiffeners. The kinetic energy evolution of both of them has a significant secondary wave peak phenomenon, and the ring-stiffener layout of reinforced middle can effectively reduce the maximum shock wave peak. Through the analysis of the implosion response of ring-stiffened cylindrical pressure hull, there is important engineering significance for the design of deep-sea pressure structures.
2024,46(13): 50-58 收稿日期：2023-08-30
DOI：10.3404/j.issn.1672-7649.2024.13.010
分类号：P751
基金项目：国家自然科学基金资助项目（U2067220）；中核集团“青年英才”科研项目；国家“万人计划”青年拔尖人才项目
作者简介：贺宇培(1998-),男,硕士研究生,研究方向为深海耐压结构水下内爆及防护
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