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原文传递 UNITED STATES NAVAL ACADEMY DIVISION OF ENGINEERING AND WEAPONS ANNAPOLIS, MARYLAND

题名：	UNITED STATES NAVAL ACADEMY DIVISION OF ENGINEERING AND WEAPONS ANNAPOLIS, MARYLAND
作者：	A R J N LLOYD PhD BSc FRINA Principal Scientific Officer
关键词：	division；engineering；aryland；weapon；nava；state；nite；acad；application；extreme
摘要：	Experiments to examine the deck wetness process and to determine the effect of above water bow form on deck wetness in head seam were conducted in the 380 ft Towind Tank of the United States Naval Academy . A systematic series of bow forms, in which flare and overhang wera varied, was tested on a model of the FFG7 frigate at one speed in irregular head waves corresponding to commonly occurring conditions in the North Atlantic in winter. It was found that above water bow form had ramatkably little effect on relative motions or deck wetness and the greatest incidence of deck wetness occurred with one of the extremely rlared forms. A new method of calculating the probability of deck wetness is proposed and verified. The calculation explains why the bows tested all had a similar performance and suggests that this is about the best that could be achieved at the chosen freeboard. Application of the calculation to a wider range of bow designs shown that a similar, overhang are given certain minimum values. Excessive flare and overhang will not ensure improved performance.
报告类型：	科技报告