[논문]The Safety of Maneuverability Based on the Hydrodynamic Forces Acting on ship hull under the Lateral Berthing

Lee, Yun-Sok

doi:10.5394/kinpr.2003.27.6.625

The Safety of Maneuverability Based on the Hydrodynamic Forces Acting on ship hull under the Lateral Berthing 원문보기

한국항해항만학회지 = Journal of navigation and port research, v.27 no.6 = no.86, 2003년, pp.625 - 630

Lee, Yun-Sok (Researcher of Korea Maritime University)

Abstract ▼ AI-Helper

In order to keep the safety of maneuverability under the lateral berthing, it is necessary to estimate the magnitudes and properties of the hydrodynamic forces acting on ship hull quantitatively. In this paper, CFD technique is used to calculate the steady lateral force according to the water depth for Wigley model under the unsteady lateral berthing. The numerical results are analysed into the steady lateral force and the transitional lateral force, and some of reviews for the safety of maneuverability relating to the lateral berthing are discussed based on the computed hydrodynamic forces.

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가설 설정

1) It is desirable that the inertia force induced by the accelerations motion should be minimized by refraining the use of tugboat. Furthermore, the sudden use of tugboat must be avoided especially in front of mooring facilities and pier as possible.
2) The departing ship could be slowly pulled by the tugboat, which can reduce the inertial force and prevent the breakdown of mooring rope as well.
3) The ship moving within the short time must be avoided because the transitional later게 force works large.
5) The one of ways for minimizing the berthing energy and the maximizing the berthing operation is that the berthing speed keeps constant considering the berth allowance of structure strengthening.
6) Water depth is an important factor to influence on the hydrodynamic forces, so berthing operation should be executed making sure of enough under keel clearance.

제안 방법

Lee, 2003) applied to calc니late the steady lateral force according to the water depth. The computed results are analysed into the transitional lateral force and steady lateral force, and the influence of water depths is investigated comparing the both of lateral force. The steady lateral force is an important element to modelize the transitional lateral force and to understand the flow field about the steady conditions.

이론/모형

Euler implicit method is applied to the time derivatives. Pressure-velocity coupling is accomplished using the PlSOCPressure Implicit Split Operator) algorithm(Chen, 1993). Therefore hundred times of repetition are required for every trial of the calculation of one-time step, the coefficient of the FA method was renewed every time repetition.

성능/효과

1) The availability and validity of CFD technique for the berthing simulations is verified.

후속연구

83. From these results, the ship with large block coefficients are influenced more than ' small ones in the shallow water, but this needs further investigation.
The result of this research is expected to play a role in providing the hydrodynamic understanding for ship operator, designing the of fenders and determining the strength of mooring facilities.

참고문헌 (10)

Chen, H. C. and Korpus, R(1993) 'A Multi-block Finite-Analytic Reynolds-Averaged Navier-Stokes Method for 3D Incompressible Flows', Individual Papers in Fluid Engineering, edited b F. M. White, ASME FED-Vol. 150, ASME Fluids Engineering Conference, pp. 113-121
Chen, M. and Chen, H. C.(1996) 'Numerical Simulation of Transient Flows Induced by a Berthing Ship', International Journal of Offshore and Polar Engineering, ISOPE, Vol. 7, No.4, pp. 277-284
Chen, M. and Chen, H. C.(1998) 'Chimera RANS Simulation of a Berthing DDG-51 Ship in Translational and Rotational Motions', International Journal of Offshore and Polar Engineering, Vol. 8, No.3, pp. 182-191

상세보기
LEE, Y. S.(2003) 'The Prediction of Hydrodynamic Forces Acting on Ship Hull in Laterally Berthing Maneuver Using CFD', International Journal of Navigation and Port Research, Vol. 27, No34, pp. 253-258

원문보기 상세보기
Patel, V. C, Chen, H. C. and Ju, S.(1990) 'Ship Stem and Wake Flows: Solutions of the Fully-Elliptic Reynolds-Averaged Navier-Stokes Equations and Comparisons with Experiments', Journal of Computational Physics, Vol. 88, No.2, pp. 305-336

상세보기
Sadakane, H.(1996) 'A Study on Lateral Drag Coefficient for Ship Moving Laterally from Rest', Journal of the Japan Institute of Navigation, No. 95, pp. 193-200
Sadakane, H. and Tsuruta, H.(1993) 'Transitional Lateral Drag Acting on Ship Moving from the Rest -An Experimental Study by Using a Ship's Model-', Journal of the Japan Institute of Navigation, No. 90, pp. 273-279
Tanaka, H. and Kijima, K.(1993) 'On the Distribution of Cross Flow Drag over the Length of a Ship Moving Transversely', The Society of Naval Architects of Japan, No. 174, pp. 1-8
Toda, Y., Lee, Y S. and Sadakane, H.(2002) 'Hydrodynamic Forces acting on ship hull Under Lateral Low Speed MotionIII: Basic Consideration Using 3-D CFD Technique', Journal of the Japan Institute of Navigation, No. 106, pp. 87-95
Takakura, Y., Ogiwara, S. and Isiguro, T. (1989) 'Turbulence Models for Transonic Viscos Flow', AIAA paper, 89-1952 CP.

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The Safety of Maneuverability Based on the Hydrodynamic Forces Acting on ship hull under the Lateral Berthing 원문보기

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The Safety of Maneuverability Based on the Hydrodynamic Forces Acting on ship hull under the Lateral Berthing 원문보기

Abstract ▼ AI-Helper

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가설 설정

제안 방법

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