描述柔性板斜向自由液面冲击的新工程理论
A new engineering theory describing oblique free surface impact by flexible plates
AI总结：
本文针对柔性板斜向入水砰击问题，利用隐式分区流固耦合模拟揭示冲击力与变形机制，并提出一种新的简化工程理论。
摘要：
在滑行艇结构设计中考虑砰击载荷对于确保足够的结构性能以避免潜在的灾难性后果至关重要。然而，由于伴随砰击现象的复杂流体流动与非线性结构变形之间相互作用的复杂性，尚未形成通用的砰击工程理论，因此设计依赖于专门理论。本文针对一个迄今缺乏恰当描述的设计工况提出了这样一种理论。为建立该理论，我们采用一种专门的隐式分区流固耦合（FSI）模拟方法，研究柔性板入水斜向冲击过程中伴随的底层物理机制。本文首先给出柔性板入水实验的验证结果，以确认所开发FSI求解器的准确性。验证之后，我们开展一系列数值分析，旨在刻画冲击力和板面外变形随冲击速度与板弯曲刚度变化的响应区域。最后，我们将FSI求解器作为一种“显微镜”，研究砰击过程中流体流动与弹性板变形的力学演化。基于这些观察，我们提出一种新颖而简单的工程理论，用于描述柔性板斜向冲击自由液面的问题（例如高速海豚式运动船舶再入水）。
英文摘要：
Consideration of slamming loads within the structural design of planning hulls is of critical importance in ensuring adequate structural performance in order to avoid potential catastrophic consequences. However, because of the intricacy in the interplay between complex fluid flows and nonlinear structural deformations that accompany the phenomenology of slamming, a general engineering theory in slamming has yet to be uncovered, and so design relies on specialized theories. In this paper, we propose one such theory for a design case that has, until now, eluded a proper description. In pursuit of this theory, we employ a specialized implicit, partitioned fluid-structural interaction (FSI) simulation approach, in order to study the underlying physical mechanisms accompanying the oblique impact of a flexible plate during water entry. In the present work, we first present validation results from flexible plate water entry experiments, to confirm the veracity of the developed FSI solver. Subsequent to validation, we carry out a series of numerical analyses, in an effort to characterize the regimes in impact force and plate out-of-plane deformations, as a function of impact velocities and plate flexural rigidity. Finally, we use our FSI solver, as a kind of "microscope", to study the mechanistic evolution of fluid flows and elastic plate deformations that occur during slamming. Based on these observations, we propose a novel, but simple engineering theory for flexible plates obliquely impacting the water free surface (e.g. high speed porpoising water craft reentry).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
