Steady sailing performance of a ship in the proximity to the bank under windy conditions
Steady sailing condition
Pure car carrier
This paper presents a method to efficiently calculate steady sailing conditions such as check helm, speed drop, hull drift angle, etc. of a ship moving in parallel to a bank wall under steady wind, together with the course stability at the equilibrium condition. Using this method, this study investigates the bank effect on the steady sailing condition and the course stability of a pure car carrier in steady wind and it evaluates the limiting wind condition for safe navigation (maneuvering limit). In case of head wind, a significant speed drop appears. In case of oblique head wind from the port side, the hull drift angle increases significantly and there is a distinct possibility that the ship touches the bank wall. In case of oblique following wind from the port side, the check helm increases significantly, because the wind force is added to the bank suction force. This becomes critical when the ship moves closer to the bank and in more shallow water areas, and the maneuvering limit level becomes more severe. The present method is a useful tool for measuring the maneuvering limit of a ship moving in close proximity to the bank under steady wind.
This study was supported by the JSPS KAKENHI Grant Number JP26249135.
Journal of Marine Science and Technology
The Japan Society of Naval Architects and Ocean Engineers (JASNAOE)
This is a post-peer-review, pre-copyedit version of an article published in Journal of Marine Science and Technology. The final authenticated version is available online at: https://doi.org/10.1007/s00773-020-00712-x
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