Towards a Computational Fluid Dynamics implementation of the critical wave method

OCEAN ENGINEERING

卷:235

Article

Silva, Kevin M.^1,2  Maki, Kevin J.² 

[1] Naval Surface Warfare Ctr Carderock Div, 9500 MacArthur Blvd, West Bethesda, MD 20817 USA

[2] Univ Michigan, Dept Naval Architecture & Marine Engn, 2600 Draper Dr, Ann Arbor, MI 48109 USA

关键词: Computational Fluid Dynamics;    Extreme events;    Wave groups;    Roll;    Probability;    Nonlinear dynamics;   

DOI  :  10.1016/j.oceaneng.2021.109451

来源: Elsevier

【 摘 要 】

The prediction of extreme ship responses continues to be an important and longstanding topic in ship hydrodynamics with a significant focus on developing probabilistic methods based on simple descriptions of the hydrodynamics that mainly provide qualitative observations. While simple nonlinear hydrodynamic for-mulations provide insight into extreme events, their underlying assumptions can prevent accurate quantitative representations of the mechanisms that are ultimately responsible for the extreme responses. Thus, research must strive to utilize increasingly more accurate hydrodynamic formulations to provide quantitative evaluations of extreme events. The present work aims to integrate extreme event probabilistic research based on the critical wave groups (CWG) method and fully nonlinear Computational Fluid Dynamics (CFD) to achieve a high fidelity representation of extreme events. This aim is achieved by embedding deterministic wave groups into irregular wave trains with known responses to produce different states at the moment of wave group encounter. The new framework is demonstrated by predicting the probability of exceedence of roll with a 2-D midship section of the Office of Naval Research Tumblehome hull in Sea State 7. The framework showcases how CFD and CWG can together reduce the computational burden of predicting extreme ship responses.

【 授权许可】

Free