{"title":"Accurate evaluation of second-order wave loads in direct time-domain simulations","authors":"","doi":"10.1016/j.enganabound.2024.105907","DOIUrl":null,"url":null,"abstract":"<div><p>Accurate and efficient calculation of all second-order wave load components in six degrees of freedom (6DoF) remains a challenging task, in particular for structures with sharp edges. Based on Gauss theorem, we have tailor-made an efficient method for direct time-domain solvers utilizing, for instance, boundary element methods. Unlike other methods based on momentum conservation or Gauss theorem that require control surfaces, this method only involves integrals on the structure and free surfaces. The accuracy and efficiency of the method are firstly verified for the mean and sum-frequency wave forces on a hemisphere and a truncated vertical cylinder. Subsequently, an application to study the motion responses of a semi-submersible floating offshore wind turbine (FOWT) in focused waves is presented, where experimental results are also available. The results indicate that the proposed method can greatly improve the computational efficiency in accurately predicting second-order loads on offshore structures with sharp edges in direct time-domain solvers. For the FOWT in focused waves, this alternative method is essential in achieving accurate prediction of hydrodynamic responses near the focus time.</p></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Analysis with Boundary Elements","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955799724003813","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Accurate and efficient calculation of all second-order wave load components in six degrees of freedom (6DoF) remains a challenging task, in particular for structures with sharp edges. Based on Gauss theorem, we have tailor-made an efficient method for direct time-domain solvers utilizing, for instance, boundary element methods. Unlike other methods based on momentum conservation or Gauss theorem that require control surfaces, this method only involves integrals on the structure and free surfaces. The accuracy and efficiency of the method are firstly verified for the mean and sum-frequency wave forces on a hemisphere and a truncated vertical cylinder. Subsequently, an application to study the motion responses of a semi-submersible floating offshore wind turbine (FOWT) in focused waves is presented, where experimental results are also available. The results indicate that the proposed method can greatly improve the computational efficiency in accurately predicting second-order loads on offshore structures with sharp edges in direct time-domain solvers. For the FOWT in focused waves, this alternative method is essential in achieving accurate prediction of hydrodynamic responses near the focus time.
期刊介绍:
This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods.
Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness.
The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields.
In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research.
The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods
Fields Covered:
• Boundary Element Methods (BEM)
• Mesh Reduction Methods (MRM)
• Meshless Methods
• Integral Equations
• Applications of BEM/MRM in Engineering
• Numerical Methods related to BEM/MRM
• Computational Techniques
• Combination of Different Methods
• Advanced Formulations.