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

• Autorzy: Motallebi Mohammad , Ghafari Hamidreza , Ghassemi Hassan , Shokouhian Mehdi

Identyfikatory

DOI

10.17402/425

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

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

• Wydawca: Wydawnictwo Naukowe Akademii Morskiej w Szczecinie
• Czasopismo: Zeszyty Naukowe Akademii Morskiej w Szczecinie
• Rocznik: 2020
• Tom: nr 62 (134)
• Strony: 108--115
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Motallebi Mohammad

• Amirkabir University of Technology, Tehran, Iran Department of Civil and Environmental Engineering

autor

Ghafari Hamidreza

• Amirkabir University of Technology, Tehran, Iran Department of Maritime Engineering

autor

Ghassemi Hassan

• Amirkabir University of Technology, Tehran, Iran Department of Maritime Engineering

autor

Shokouhian Mehdi

• Morgan State University, Department of Civil Engineering, Baltimore, USA

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).