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The transient responses of two-layered cylindrical shells attacked by underwater explosive shock waves

机译：水下爆炸冲击波侵袭的两层圆柱壳的瞬态响应

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摘要

An approximation solution is introduced for the dynamic response of a two-layered cylindrical shell of circular cross-section subjected to an underwater explosive shock wave. The solution is obtained within the framework of the Flugge thin shell theory and the reflected-afterflow-virtual-source (RAVS) method is used to account for the fluid-structure interaction. Detailed numerical computations are carried out, in dimensionless form, for the cases of infinitely long two-layered cylindrical shells. Time histories of non-dimensional radial velocity, mid-surface strain, Oth mode radial displacement and 1st mode radial velocity are presented in graphical form and the effects of elastic modulus, shell radius and thickness on the transient response characteristics of the shells are investigated.
机译：提出了一种近似解，用于圆形截面的两层圆柱壳在水下爆炸冲击波作用下的动力响应。该解决方案是在Flugge薄壳理论的框架内获得的，并且使用了反射后流虚拟源（RAVS）方法来解释流固耦合。对于无限长的两层圆柱壳，将以无量纲形式进行详细的数值计算。以图表形式显示了无量纲径向速度，中表面应变，Oth模式径向位移和1st模式径向速度的时间历程，并研究了弹性模量，壳半径和厚度对壳瞬态响应特性的影响。

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