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Title
Calculating the second-order hydrodynamic force on fixed and floating tandem cylinders

ISSN printed: 1733-8670, ISSN on-line: 2392-0378
Motallebi, Mohammad1; Ghafari, Hamidreza2; Ghassemi, Hassan3; Shokouhian, Mehdi4
URI: https://repository.am.szczecin.pl/handle/123456789/2624
2020-06-29
In this paper, the second-order hydrodynamic force on fixed and floating tandem cylinders has been calculated and different parameters have been taken into consideration. An incident wave is diffracted by the fixed cylinder, and as a result low-frequency waves radiate toward the floating cylinder and cause low-frequency second-order hydrodynamic forces to act on the surface of the floating cylinder. The interactions between the fixed and floating cylinders have been investigated by changing the distance between them, as well as the draft and radius of the floating cylinder. By employing perturbation series analysis over the wetted surface, the second-order wave excitation force has been calculated. The maximum force applied on the floating cylinder becomes non-dimensional when considering it with and without the fixed cylinder. The results showed the effect that the existence of the fixed cylinder had on the increase in the second-order forces is quite evident where, for a significant parameter of the floating cylinder, the force in the heave direction was enhanced by up to 1.55 times.
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Title

Calculating the second-order hydrodynamic force on fixed and floating tandem cylinders

Pages

108-115

Figures

6

Tables

2

ISSN printed

1733-8670

ISSN on-line

2392-0378

DOI

10.17402/425

Type

Journal

62 Scientific Journals of the Maritime University of Szczecin, no. 62 / 2020

Publisher

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Copyright Holder

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Published

2020-06-29

Recieved

2019-12-09

Accepted

2020-04-08

Funding

No data

Keywords

fixed cylinder, floating cylinder, second order hydrodynamic force, diffracted wave, potential theory

URI:

https://repository.am.szczecin.pl/handle/123456789/2624

Language

English

Authors

Motallebi, Mohammad1; Ghafari, Hamidreza2; Ghassemi, Hassan3; Shokouhian, Mehdi4

Affiliation

1 Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran, m_motallebi@aut.ac.ir
2 Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran, hamidghafari230@yahoo.com
3 Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran, gasemi@aut.ac.ir
4 Morgan State University, Department of Civil Engineering, Baltimore, USA,

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