This paper studies a contemporary event of the sunken Argentinian submarine ARA San Juan S-42 in November 2017. The submarine’s wreckage was found one year later on the seabed off the southern Atlantic coast of Argentina, with its imploded debris scattered on the seabed at the depth of about 900 meters under sea level. We develop computational mechanics modeling and conduct supercomputer simulations for this study, using the versatile software LS-DYNA as the platform. We first revisit underwater implosion phenomena by the test of pressurizing a plugged aluminum cylinder in a water tank and match the patterns of structural deformations as the important way to validate our computational methodology and model selections. Furthermore, the radiations of the implosion shocks are computed and compared with those in the literature. Using a base model for the submarine, we are able to perform event reconstruction for the underwater implosion of ARA San Juan S-42. Our work can encompass the features of structural fracture and break-up, which were not included in the earlier studies. Furthermore, we show that by adding ring stiffeners (“buckle arrestors”), we can delay the onset of underwater implosion by increasing the tolerance of more water depth for the submarine. All the dynamic nonlinear implosion phenomena can be visualized by video animations obtained from our supercomputer simulations, which are also compared with an artistically rendered video animation.

本文研究了2017年11月沉没的阿根廷潜艇ARA San Juan S-42的当代事件。一年后，该潜艇的残骸在阿根廷南部大西洋沿岸的海床上被发现，其内爆碎片散落在海底在海平面以下约900米的深度。我们使用通用软件LS-DYNA作为平台，开发了计算力学模型并进行了本研究的超级计算机仿真。我们首先通过在水箱中对铝制塞子进行加压试验来重新研究水下内爆现象，并匹配结构变形的模式，这是验证我们的计算方法和模型选择的重要方法。此外，计算了内爆冲击的辐射并将其与文献中的辐射进行比较。使用潜艇的基本模型，我们能够对ARA San Juan S-42的水下爆炸进行事件重建。我们的工作可能包含结构破裂和破裂的特征，而早期的研究并未包括这些特征。此外，我们表明，通过添加环形加劲肋（“带扣避雷器”），我们可以通过增加对潜艇更大水深的承受能力来延迟水下内爆的发生。所有动态非线性内爆现象都可以通过从我们的超级计算机模拟获得的视频动画来可视化，并且还可以与艺术渲染的视频动画进行比较。在早期的研究中未包括在内。此外，我们表明，通过添加环形加劲肋（“带扣避雷器”），我们可以通过增加对潜艇更大水深的承受能力来延迟水下内爆的发生。所有动态非线性内爆现象都可以通过我们的超级计算机仿真获得的视频动画进行可视化，并将其与艺术渲染的视频动画进行比较。在早期的研究中未包括在内。此外，我们表明，通过添加环形加劲肋（“带扣避雷器”），我们可以通过增加对潜艇更大水深的承受能力来延迟水下内爆的发生。所有动态非线性内爆现象都可以通过我们的超级计算机仿真获得的视频动画进行可视化，并将其与艺术渲染的视频动画进行比较。