Hydroelastic analysis of hard-chine sections entering water – observations for use in preliminary design stage

IF 1.3 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme Pub Date : 2022-11-03 DOI:10.1115/1.4056162

S. Tavakoli, A. Babanin, S. Hirdaris

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引用次数: 4

Abstract

Wing-in Ground Effect (WIG) vehicles and planing hulls are exposed to unsteady, high magnitude hydrodynamic forces as their bow enters water. The resulting forces can lead to structural damages and uncomfortable conditions for passengers onboard. This article aims to provide deeper understanding on the influence of structural flexibility throughout the water entry process of a hard chine section. A Finite Volume Method (FVM) based flexible fluid-structure interaction (FFSI) model is used to solve multi-physics. Quantitative comparisons are made between experimental and computational data. Simulations demonstrate that structural responses can attenuate the pressure acting on the body of hard-chine sections impinging water with deadrise angles of 10°, 20° and 30°.However, they cannot affect that of a section with deadrise angle of 45° since its pressure distribution pattern is different. It is shown that the impact speed has an important role in hydroelastic response while the sectional Young’s modulus affects impact pressures and resulting equivalent stresses. The former increases under the increase of Young’s modulus. The latter may increase when the impact speed is low and decreases when the impact speed is high. It is concluded that the results presented may be useful for preliminary design.

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入水硬断面的水弹性分析。初步设计阶段用观测资料

翼内地面效应(WIG)车辆和船体在其船首入水时暴露在非定常、高强度的水动力下。由此产生的力可能导致结构损坏，并使乘客感到不舒服。本文旨在更深入地了解结构柔韧性在硬板断面入水过程中的影响。采用基于有限体积法(FVM)的柔性流固耦合(FFSI)模型求解多物理场。对实验数据和计算数据进行了定量比较。模拟结果表明，结构响应可以减弱止升角为10°、20°和30°时冲击水的硬板截面体上的压力。而当止升角为45°时，由于其压力分布模式不同，对压力分布不产生影响。结果表明，冲击速度对水弹性响应有重要影响，截面杨氏模量影响冲击压力和产生的等效应力。前者随杨氏模量的增大而增大。后者在冲击速度较低时增大，在冲击速度较高时减小。所得结果对初步设计有一定的参考价值。

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

Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme 工程技术-工程：大洋

CiteScore

4.20

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Offshore Mechanics and Arctic Engineering is an international resource for original peer-reviewed research that advances the state of knowledge on all aspects of analysis, design, and technology development in ocean, offshore, arctic, and related fields. Its main goals are to provide a forum for timely and in-depth exchanges of scientific and technical information among researchers and engineers. It emphasizes fundamental research and development studies as well as review articles that offer either retrospective perspectives on well-established topics or exposures to innovative or novel developments. Case histories are not encouraged. The journal also documents significant developments in related fields and major accomplishments of renowned scientists by programming themed issues to record such events. Scope: Offshore Mechanics, Drilling Technology, Fixed and Floating Production Systems; Ocean Engineering, Hydrodynamics, and Ship Motions; Ocean Climate Statistics, Storms, Extremes, and Hurricanes; Structural Mechanics; Safety, Reliability, Risk Assessment, and Uncertainty Quantification; Riser Mechanics, Cable and Mooring Dynamics, Pipeline and Subsea Technology; Materials Engineering, Fatigue, Fracture, Welding Technology, Non-destructive Testing, Inspection Technologies, Corrosion Protection and Control; Fluid-structure Interaction, Computational Fluid Dynamics, Flow and Vortex-Induced Vibrations; Marine and Offshore Geotechnics, Soil Mechanics, Soil-pipeline Interaction; Ocean Renewable Energy; Ocean Space Utilization and Aquaculture Engineering; Petroleum Technology; Polar and Arctic Science and Technology, Ice Mechanics, Arctic Drilling and Exploration, Arctic Structures, Ice-structure and Ship Interaction, Permafrost Engineering, Arctic and Thermal Design.