Hydrodynamic interaction between two ships arranged side by side in shallow water

Yuan, Zhiming and Incecik, Atilla and He, Shi (2014) Hydrodynamic interaction between two ships arranged side by side in shallow water. In: ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. ASME. ISBN 978-0-7918-4550-9

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Abstract

The hydrodynamic interaction between two ships with side-by-side arrangement is analyzed by using 3-D Rankine source panel code. The source points are distributed over the mean wetted body surface as well as on the free surface. The shallow water effect has been taken into consideration. Moreover, the influence of the distance between the vessels is also investigated. To verify the present code, two Wigley III hulls are simulated both in beam sea and head sea conditions. The wave pattern and the motion RAOs of 6-DOF are calculated by present code and compared with WADAM program which is based on Green function method. From the comparisons, good agreement is found between present calculation and Wadam results. It is found that the hydrodynamic interactions are generally important especially in beam sea case. The resonant frequency is greatly influenced by the distance between the vessels.