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Finite water depth effect on wave-body problems solved by Rankine source method
Feng, Aichun; Tang, Peng; You, Yunxiang; Liu KZ(刘开周)
Department水下机器人研究室
Source PublicationJournal of Ocean University of China April 2017, Volume 16, Issue 2, pp
ISSN1672-5182
2017
Volume16Issue:2Pages:191-199
Indexed BySCI ; CSCD
WOS IDWOS:000396071600003
CSCD IDCSCD:5975370
Contribution Rank4
Funding OrganizationNational Natural Science Foundation of China (No. 11372184).
KeywordFinite Water Depth Rankine Source Method Continuous Source Panel Runge-kutta
AbstractFinite water depth effect for wave-body problems are studied by continuous Rankine source method and non- desingularized technique. Free surface and seabed surface profiles are represented by continuous panels rather than a discretization by isolated points. These panels are positioned exactly on the fluid boundary surfaces and therefore no desingularization technique is required. Space increment method is applied for both free surface source and seabed source arrangements to reduce computational cost and improve numerical efficiency. Fourth order Runge-Kutta iteration scheme is adopted on the free surface updating at every time step. The finite water depth effect is studied quantitatively for a series of cylinders with different B/T ratios. The accuracy and efficiency of the proposed model are validated by comparison with published numerical results and experimental data. Numerical results show that hydrodynamic coefficients vary for cylinder bodies with different ratios of B/T. For certain set of B/T ratios the effect of finite water depth increases quickly with the increase of motion frequency and becomes stable when frequency is relatively large. It also shows that water depths have larger hydrodynamic effects on cylinder with larger breadth to draft ratios. Both the heave added mass and damping coefficients increase across the frequency range with the water depths decrease for forced heave motion. The water depths have smaller effects on sway motion response than on heave motion response.
Language英语
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectOceanography
WOS KeywordDESINGULARIZED METHOD ; SURFACE ; MOTIONS ; MASS
WOS Research AreaOceanography
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Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/20218
Collection水下机器人研究室
Corresponding AuthorTang, Peng
Affiliation1.Department of Civil and Environmental Engineering National University of Singapore, Singapore
2.College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, P. R. China
3.School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China
4.State key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Science, Shenyang, P. R. China
Recommended Citation
GB/T 7714
Feng, Aichun,Tang, Peng,You, Yunxiang,et al. Finite water depth effect on wave-body problems solved by Rankine source method[J]. Journal of Ocean University of China April 2017, Volume 16, Issue 2, pp,2017,16(2):191-199.
APA Feng, Aichun,Tang, Peng,You, Yunxiang,&Liu KZ.(2017).Finite water depth effect on wave-body problems solved by Rankine source method.Journal of Ocean University of China April 2017, Volume 16, Issue 2, pp,16(2),191-199.
MLA Feng, Aichun,et al."Finite water depth effect on wave-body problems solved by Rankine source method".Journal of Ocean University of China April 2017, Volume 16, Issue 2, pp 16.2(2017):191-199.
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