Abstract
Recent model experiments by the authors indicated that bow-diving is one of the crucial capsizing modes for a ship traveling in following and quartering seas with high forward velocity, while only a few research attempts on this phenomenon have been reported so far [1]. In this paper, basic features of bow-diving are discussed with measured time series. It is concluded that bow-diving is associated with surfriding and triggered with submergence of bow bulwark top. Static calculating of vertical distance between bulwark top and wave surface by Froude-Krylov assumption well explained the possibility of bow-diving. Once the bow submerged, the restoring arm can be drastically reduced and then the ship could capsize.
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