Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps

Multi-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consis...

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Autores principales:	Mingsheng Chen, Hongrui Guo, Rong Wang, Ran Tao, Ning Cheng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	multi-module floating system gap resonance hydrodynamic interaction impulse response function artificial damping ANSYS-AQWA Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/db2cf62eb4d944a5afb2e815e3a5fa66
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spelling	oai:doaj.org-article:db2cf62eb4d944a5afb2e815e3a5fa662021-11-25T18:04:49ZEffects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps10.3390/jmse91112562077-1312https://doaj.org/article/db2cf62eb4d944a5afb2e815e3a5fa662021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1256https://doaj.org/toc/2077-1312Multi-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consists of multiple modules with narrow gaps in which hydrodynamic interactions play a non-neglected role. This study considers a numerical model consisting of several rectangular modules to study the hydrodynamics and dynamics of the multi-module floating system subjected to the waves. Based on ANSYS-AQWA, both frequency-domain and time-domain simulations are performed to analyze the complex multi-body hydrodynamic interactions by introducing artificial damping on the gap surfaces. Parametric studies are carried out to investigate the effects of the gap width, shielding effects of the multi-body system, artificial damping ratio on the gap surface, and the dependency of the hydrodynamic interaction effect on wave headings is clarified. Based on the results, it is found that the numerical analysis based on the potential flow theory with artificial damping introduced can produce accurate results for the normal wave period range. In addition, the effects of artificial damping on the dynamics and connector loads are investigated by using a simplified RMFC model. For the case of adding an artificial damping ratio of 0.2, the relative heave and pitch motions are found to be reduced by 33% and 50%, respectively. In addition, the maximum cable and fender forces are found to be reduced by 50%, compared with the case without viscosity correction.Mingsheng ChenHongrui GuoRong WangRan TaoNing ChengMDPI AGarticlemulti-module floating systemgap resonancehydrodynamic interactionimpulse response functionartificial dampingANSYS-AQWANaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1256, p 1256 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	multi-module floating system gap resonance hydrodynamic interaction impulse response function artificial damping ANSYS-AQWA Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	multi-module floating system gap resonance hydrodynamic interaction impulse response function artificial damping ANSYS-AQWA Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Mingsheng Chen Hongrui Guo Rong Wang Ran Tao Ning Cheng Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
description	Multi-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consists of multiple modules with narrow gaps in which hydrodynamic interactions play a non-neglected role. This study considers a numerical model consisting of several rectangular modules to study the hydrodynamics and dynamics of the multi-module floating system subjected to the waves. Based on ANSYS-AQWA, both frequency-domain and time-domain simulations are performed to analyze the complex multi-body hydrodynamic interactions by introducing artificial damping on the gap surfaces. Parametric studies are carried out to investigate the effects of the gap width, shielding effects of the multi-body system, artificial damping ratio on the gap surface, and the dependency of the hydrodynamic interaction effect on wave headings is clarified. Based on the results, it is found that the numerical analysis based on the potential flow theory with artificial damping introduced can produce accurate results for the normal wave period range. In addition, the effects of artificial damping on the dynamics and connector loads are investigated by using a simplified RMFC model. For the case of adding an artificial damping ratio of 0.2, the relative heave and pitch motions are found to be reduced by 33% and 50%, respectively. In addition, the maximum cable and fender forces are found to be reduced by 50%, compared with the case without viscosity correction.
format	article
author	Mingsheng Chen Hongrui Guo Rong Wang Ran Tao Ning Cheng
author_facet	Mingsheng Chen Hongrui Guo Rong Wang Ran Tao Ning Cheng
author_sort	Mingsheng Chen
title	Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
title_short	Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
title_full	Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
title_fullStr	Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
title_full_unstemmed	Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
title_sort	effects of gap resonance on the hydrodynamics and dynamics of a multi-module floating system with narrow gaps
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/db2cf62eb4d944a5afb2e815e3a5fa66
work_keys_str_mv	AT mingshengchen effectsofgapresonanceonthehydrodynamicsanddynamicsofamultimodulefloatingsystemwithnarrowgaps AT hongruiguo effectsofgapresonanceonthehydrodynamicsanddynamicsofamultimodulefloatingsystemwithnarrowgaps AT rongwang effectsofgapresonanceonthehydrodynamicsanddynamicsofamultimodulefloatingsystemwithnarrowgaps AT rantao effectsofgapresonanceonthehydrodynamicsanddynamicsofamultimodulefloatingsystemwithnarrowgaps AT ningcheng effectsofgapresonanceonthehydrodynamicsanddynamicsofamultimodulefloatingsystemwithnarrowgaps
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Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps

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