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标题：Calculation of the mean long-term service speed of transport ship Continuation ot the first part of the paper published in the Polish Maritime Research No.4(50),October 2006 Part II Service speed of ship sailing on regular shipping route in real weather c
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作者：Tadeusz Szelangiewicz ; Katarzyna Żelazny
期刊名称：Polish Maritime Research
电子版ISSN：2083-7429
出版年度：2007
卷号：14
期号：1
页码：28-32
DOI：10.2478/v10012-007-0005-1
语种：English
出版社：Sciendo
摘要：Service speed obtainable by a ship in real weather conditions when sailing on a given shipping route,is one of the major parameters which have great impact on ship operation costs.The so far used,very approximate method of service speed prediction based on “service margin”,is very little exact.In this paper a new method based on additional ship resistance dependent on mean statistical parameters of wave and wind occurring on a given shipping route,is presented.The mean long-term service speed is calculated on the basis of the calculated additional resistance and the screw propeller and propulsion engine parameters.Also,a new definition of service margin and a way of its calculation is presented apart from the results of the mean service speed calculation depending on ship’s type and size and shipping route.
关键词：ship service speed;wind;waving;shipping route;service margin;long-term prediction.