A semi analytic method for the analysis of the symmetric hydroelastic response of a container ship under slamming and green water loads

D. Sengupta, Tushar Kanti Show, S. Hirdaris, R. Datta
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引用次数: 3

Abstract

This paper presents a semi analytic time domain method for the analysis of the symmetric hydroelastic response of a container ship subject to slamming and green water loads. An Impulse Response Function (IRF) is adopted for the calculation of radiation, diffraction and wave excitation forces. Local hydrodynamic forces associated with green water on decks and slamming loads are respectively modelled by the Buchner’s Dam Break Model and a Generalised Wagner Model. The structural responses are captured by Euler-Bernoulli beam theory and solved by the modal superposition method. The Duhamel Integral technique is used to evaluate the dynamic response. A parametric study demonstrates how external forces may affect the global wave induced vertical bending moments and shear forces. Numerical simulations are compared against a hybrid method that combines computational fluid dynamics, boundary element and finite element methods for low to medium frequency induced dynamic response. It is concluded that the proposed semi analytic methodology is fast and accurate and may be useful at concept ship design stage.
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用半解析法分析了集装箱船在猛烈撞击和绿水载荷作用下的对称水弹性响应
本文提出了一种半解析时域方法,用于分析集装箱船在撞击和绿水载荷作用下的对称水弹性响应。采用脉冲响应函数(IRF)计算辐射、衍射和波激力。与甲板上的绿水和撞击载荷相关的局部水动力分别由Buchner的溃坝模型和广义Wagner模型建模。结构响应用欧拉-伯努利梁理论捕获,用模态叠加法求解。采用Duhamel积分技术对系统的动态响应进行了计算。参数研究表明,如何外力可能影响全局波诱导的垂直弯矩和剪力。数值模拟与计算流体力学、边界元法和有限元法相结合的低中频动力响应混合方法进行了比较。结果表明,所提出的半解析方法快速、准确,可用于概念船设计阶段。
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来源期刊
CiteScore
3.90
自引率
11.10%
发文量
77
审稿时长
>12 weeks
期刊介绍: The Journal of Engineering for the Maritime Environment is concerned with the design, production and operation of engineering artefacts for the maritime environment. The journal straddles the traditional boundaries of naval architecture, marine engineering, offshore/ocean engineering, coastal engineering and port engineering.
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