Numerical study of slamming and whipping loads in moderate and large regular waves for different forward speeds

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2023-12-22 DOI:10.1016/j.marstruc.2023.103563

Hui Li , Jian Zou , Yinghao Peng , Xueqian Zhou , Lin Lu , Shuzheng Sun

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Abstract

This paper describes the development of a time-domain hydroelastic numerical model for investigating the slamming and whipping loads imposed on a ship traveling at different forward speeds. The numerical model integrates a beam model, the 3-D Rankine panel model, and the 2-D modified Logvinovich model. The tilt angle of the 2-D profile in the slamming model is determined by the direction of relative velocity, which takes the forward sailing speed into account. The computational results are validated against a segmented model test of a large cruise ship. The convergence of the model with different numbers of elastic modes and slamming profiles is studied to ensure that the numerical results are stable. The main contributor to the whipping response is found to be the vibration of the first-order elastic mode. The slamming force is sensitive to the longitudinal interval of the slamming profiles, especially in the stern. The characteristics of the slamming pressure under bow flare and the whipping response at midship are also investigated. The numerical and experimental whipping responses are found to be in good agreement, and the local slamming pressure based on the slamming profile is more accurate when considering the effect of the ship's forward speed.

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不同前进速度下中等和大型规则波浪中的撞击和鞭打载荷的数值研究

本文介绍了一种时域流体弹性数值模型的开发情况，该模型用于研究施加在以不同前进速度行驶的船舶上的撞击和鞭打载荷。该数值模型集成了一个横梁模型、3-D 朗肯面板模型和 2-D 改良罗格维诺维奇模型。撞击模型中 2-D 剖面的倾斜角由相对速度方向决定，而相对速度方向则考虑了前进航速。计算结果通过大型游轮的分段模型试验进行了验证。研究了模型在不同弹性模态数和撞击剖面下的收敛性，以确保数值结果的稳定性。研究发现，一阶弹性模式的振动是造成鞭打响应的主要因素。撞击力对撞击剖面的纵向间隔很敏感，尤其是在船尾。此外，还研究了船首外扩下的撞击压力特征和舯部的鞭打响应。结果表明，数值和实验的鞭打响应非常吻合，而且在考虑到船舶前进速度的影响时，基于倾覆剖面的局部倾覆压力更为精确。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.