IMECH-IR  > 流固耦合系统力学重点实验室
Fluctuation of magnitude of wave loads for a long array of bottom-mounted cylinders
Zeng XH(曾晓辉)1,2; Yu FJ(于法军)1,2; Shi M(史民)1; Wang Q(王琪)1,2
Source PublicationJOURNAL OF FLUID MECHANICS
2019-06-10
Volume868Pages:244-285
ISSN0022-1120
Abstract

For wave loads on cylinders constituting a long but finite array in the presence of incident waves, variations in the magnitude of the load with the non-dimensional wavenumber exhibit interesting features. Towering spikes and nearby secondary peaks (troughs) associated with trapped modes have been studied extensively. Larger non-trapped regions other than these two are termed Region III in this study. Studies of Region III are rare. We find that fluctuations in Region III are regular; the horizontal distance between two adjacent local maximum/minimum points, termed fluctuation spacing, is constant and does not change with non-dimensional wavenumbers. Fluctuation spacing is related only to the total number of cylinders in the array, identification serial number of the cylinder concerned and wave incidence angle. Based on the interaction theory and constructive/destructive interference, we demonstrate that the fluctuation characteristics can be predicted using simple analytical formulae. The formulae for predicting fluctuation spacing and the abscissae of every peak and trough in Region III are proposed. We reveal the intrinsic mechanism of the fluctuation phenomenon. When the diffraction waves emitted from the cylinders at the ends of the array and the cylinder concerned interfere constructively/destructively, peaks/troughs are formed. The fluctuation phenomenon in Region III is related to solutions of inhomogeneous equations. By contrast, spikes and secondary peaks are associated with solutions of the eigenvalue problem. This study of Region III complements existing understanding of the characteristics of the magnitude of wave load. The engineering significances of the results are discussed as well.

Keywordsurface gravity waves wave scattering wave-structure interactions
DOI10.1017/jfm.2019.195
Indexed BySCI ; EI
Language英语
WOS IDWOS:000465216100001
WOS KeywordSEMIINFINITE PERIODIC ARRAY ; TRAPPED MODES ; HYDRODYNAMIC INTERACTIONS ; CIRCULAR-CYLINDER ; SURFACE-WAVES ; WATER-WAVES ; SCATTERING ; DIFFRACTION ; BODIES ; APPROXIMATION
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding ProjectNational Natural Science Foundation of China[11672306] ; National Natural Science Foundation of China[51490673] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020101] ; 13th Five-year Informatization Plan of the Chinese Academy of Sciences[XXH13506]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; 13th Five-year Informatization Plan of the Chinese Academy of Sciences
Classification一类/力学重要期刊
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78745
Collection流固耦合系统力学重点实验室
Corresponding AuthorZeng XH(曾晓辉)
Affiliation1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zeng XH,Yu FJ,Shi M,et al. Fluctuation of magnitude of wave loads for a long array of bottom-mounted cylinders[J]. JOURNAL OF FLUID MECHANICS,2019,868:244-285.
APA Zeng XH,Yu FJ,Shi M,&Wang Q.(2019).Fluctuation of magnitude of wave loads for a long array of bottom-mounted cylinders.JOURNAL OF FLUID MECHANICS,868,244-285.
MLA Zeng XH,et al."Fluctuation of magnitude of wave loads for a long array of bottom-mounted cylinders".JOURNAL OF FLUID MECHANICS 868(2019):244-285.
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