Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Numerical study on the influence of waves on both sides on the stability of damaged oil tankers
Bo Chen, Jinshu Lu, Zhiwei Ma
School of Shipbuilding and Maritime Transport, Zhejiang Ocean University.
Zhoushan, Zhejiang, China

ABSTRACTKEY WORDS: damaged oil tanker; wave direction; anti-settling;damage stability; CFD.

Damage of tanker threatens the safety of life and property, even cause theINTRODUCTION

ship to capsize, leaks can also cause serious environmental pollution. Theinteraction between damaged tankers and waves is very complex, it isimportant to study the motion response of damaged tanker under wave

Maritime transportation has become the main mode of transportation foraction for emergency measures after damage. The motion of damaged

oil trade. Although modern navigation technology has greatly improved,

tanker in regular waves is studied in this paper, by building abut ships inevitably collide, Make the ship likely to tilt or sink out ofcomputational model based on RANS (Reynolds-averaged Navier-control, the marine accident caused serious economic losses andStokes equations), VOF (Volume of Fluid) method was used to trace theenvironmental pollution. Reasonable decision-making after the ship isfree liquid level, the unsteady solver detects changes in the hull motion

damaged can effectively reduce the loss of personnel and property andin six degrees of freedom. In the frequency domain, the motion response

environmental pollution.

of a scaled model of a damaged very large crude oil carrier (VLCC) in

In the study of ship motion, the method of model test is difficult to carry

regular waves with the same wave height and different wave directions

out real simulation and systematic analysis of the factors affecting theis simulated and studied. The nonlinear coupled motion response analysis

movement of damaged ships, with the development of computationalof the damaged oil tanker under wave action is carried out. The calculated

fluid dynamics in recent years, the use of CFD (Computational Fluidvalue of wave height is compared with the theoretical value. TheDynamics) for the study of ship motion has become a trend. Scholar

calculated value of the ship roll frequency response function is compared

Vassals (1994) combined the traditional seakeeping theory with thewith the data, verify the accuracy of the model method. Research shows:quasi-static assumption of the damaged tank flooding model, to carry out

The hull motion law of damaged oil tankers in waves is obviously

research on the motion of ships in waves. Chang (1999) assumed sloshingdifferent from other damaged ships, the influence of waves in different

and obeyed the shallow water equation. Van't Veer (2004) based on thedirections on the leakage and movement trend of the damaged oil tanker

Bernoulli equation hydrodynamic model was used to determine the flowis also very different. Under waves of the same frequency, waves invelocity through the opening.

different directions have different effects on the movement of damaged

Lee (2007) developed a time-domain theoretical model that can beoil tankers. In the experiment, when the wave is on the side of the oil tankapplied to any ship, which is used to predict the hull motion of thebreach, the sinking resistance of the hull is better than when the waves

damaged ship after flooding. Lu (2013a) used the model test method andare on the undamaged side, while the hull has better stability when thea Reynolds-averaged RNAS equation to study the problem of damaged

waves are on the undamaged side. Motion under different working

cabin water inflow without considering the outer fluid domain in the fixed

conditions is simulated by experiments, which can help predict thestate of the ship, the two results are in good agreement.

movement and leakage of damaged oil tankers in waves.

Begovic (2013b) conducted an experimental study on the motion of theDTBT-5415 ship model in waves under the condition of damage. Gao3554