晃动过程中波浪作用下罐壁FSI的降阶模型

IF 0.6 Q4 ENGINEERING, MARINE
R. W. Bos, M. van der Eijk, J.H. den Besten, P. Wellens
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引用次数: 1

摘要

波浪冲击引起的载荷是液化天然气(LNG)油轮及其隔热设计中的一个限制因素。目前的方法考虑了独立于储罐响应的荷载。通过了解波浪载荷和响应之间相互作用的影响,可以设计出更好的储罐,然而预测这些影响在计算上是昂贵的。本文提出了非静水浅水方程的一个新应用,即作为波浪冲击下流体-结构相互作用的降阶模型(ROM)。我们的ROM被比作高保真模型。所提出的ROM快速准确地预测了总脉冲和附加质量,从而预测了结构在自由振动阶段的一般行为。然而,它并不总是准确地预测最大力。因此,它被认为是对流体-结构相互作用很重要的载荷进行首次筛选的合适工具,之后可以使用更准确的方法来评估最有趣的情况。对各种冲击角和速度进行了敏感性研究,表明流体-结构相互作用的重要性在很大程度上取决于具体情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A reduced order model for FSI of tank walls subject to wave impacts during sloshing
Loads due to wave impacts are a limiting factor in the design of liquefied natural gas (LNG) tankers and their insulation. The current methodology considers the load independent from the response of the tank. Better tanks can be designed by knowing the effect of the interaction between the wave loads and the response, however predicting these effects is computationally expensive. In this paper a new application of the non-hydrostatic shallow water equations are presented, namely as a reduced order model (ROM) for fluid structure interaction for wave impacts. Our ROM is compared to a high fidelity model. The proposed ROM is fast and accurately predicts the total impulse and added mass, and therefore the general behaviour of the structure during the free vibration phase. It does however not always accurately predict the maximum force. It is therefore considered an appropriate tool for a first screening of the loads for which fluid-structure interaction is important, after which a more accurate method can be used to evaluate the most interesting cases. A sensitivity study is performed for various impact angles and velocities, showing that the importance of fluid structure interaction depends highly on the specific situation.
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来源期刊
CiteScore
2.60
自引率
0.00%
发文量
8
期刊介绍: The journal International Shipbuilding Progress was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as: conceptual design structural design hydromechanics and dynamics maritime engineering production of all types of ships production of all other objects intended for marine use shipping science and all directly related subjects offshore engineering in relation to the marine environment ocean engineering subjects in relation to the marine environment
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