Virtual ship’s roll decay test with the use of CFD technique

• Autorzy: Krata P. , Jachowski J.

Identyfikatory

DOI

10.5604/12314005.1213595

• Języki publikacji: EN

Abstrakty

EN

Since safety of navigation is related to the stability performance of a ship, the transverse stability is routinely calculated and measured. One of the crucial experimental approach is a roll decay test. Although, an obtained result of the roll decay test carried out on the full-scale ship needs to be compared to a benchmark enabling an estimation of the relevant stability. Nowadays such a benchmark is just based on the simplified GM-based IMO-recommended formula. This research aims at the more sophisticated method of ship’s natural period of roll estimation and thus her stability assessment. The CFD (computational fluid dynamics) technique is applied and the result of the free roll simulation is compared to the solution of a roll equation. The one degree-of-freedom roll equation is applied with regard to the nonlinear ship righting moment and the nonlinear damping moment obtained according to Ikeda’s method. The six degrees-of-freedom simulation of ship’s roll decay test was carried out by the use of FlowVision code utilizing the Reynolds-averaged Navier–Stokes equation with regard to the turbulent flows based on the eddy viscosity concept. The semi-empirical k-ε turbulence model was applied. Thereby, the CFD-based approach allows to get rid of any assumptions regarding the value of the damping coefficient, which is an advantage over the roll equation based approach.

Słowa kluczowe

EN

sea transport; ship stability; roll simulation; roll decay test; computational fluid dynamics

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 2
• Strony: 215--221
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Krata P.

• Gdynia Maritime University Faculty of Navigation, Department of Ship Operation Jana Pawła II Avenue 3, 81-345 Gdynia, Poland tel.:[phone]

autor

Jachowski J.

• Gdynia Maritime University Faculty of Navigation, Department of Ship Operation Jana Pawła II Avenue 3, 81-345 Gdynia, Poland tel.:[phone]

Bibliografia

• [1] Bulian, G., Nonlinear parametric rolling in regular waves – a general procedure for the analytical approximation of the GZ curve and its use in time domain simulation, Ocean Eng., Vol. 32, pp. 309-330, 2005.
• [2] Contento, G., Fracescutto, A., Piciullo, M., On the effectiveness of constant coefficients roll motion equation, Ocean Eng., Vol. 23, pp. 597-618, 1996.
• [3] FlowVision HPC Manual, Capvidia, Belgium 2010.
• [4] IMO, International Code on Intact Stability (2009 Ed.), 2008.
• [5] Kawahara, Y., Maekawa, K., Ikeda, Y., A simple prediction formula of roll damping of conventional cargo ships on the basis of Ikeda’s method and its limitation, Journal of Shipping and Ocean Engineering, Vol. 2, pp. 201-210, 2012.
• [6] Kobyliński, L., Kastner, S., Stability and Safety of Ships, Vol. 1: Regulation and Operation, Elsevier Ocean Engineering Books, Vol. 9, 2003.
• [7] Krata, P., Szłapczynska, J., Weather hazard avoidance in modelling safety of motor-driven ship for multicriteria weather routing, International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 6 No. 1, 2012.
• [8] Krata, P., Szpytko, J., Weintrit, A., Modelling of ship’s heeling and rolling for the purpose of gantry control improvement in the course of cargo handling operations in sea ports, Solid State Phenomena, Vol. 198, pp. 539-546, 2013.
• [9] Tylan, M., The effect of nonlinear damping and restoring in ship rolling, Ocean Eng., Vol. 27, pp. 921-932, 2000.
• [10] Wawrzyński, W., Krata, P., Method for ship’s rolling period prediction with regard to non-linearity of GZ curve, Journal of Theoretical and Applied Mechanics (JTAM) – in press.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.