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- W2165092093 abstract "Some essential aspects of mathematical modelling the uniform current dynamic impact on ship manoeuvring are discussed and assessed. a simulation of a pure drift, and such a drift coupled with a turning motion is next performed for a small tanker. The one-knot current gives rise to the maximum yaw velocity of order fifteen degrees per minute associated however with a relatively long response time. in the shiphandling practise, ship manoeuvring simulation (waterway design, development of safe and efficient shiphandling strategies for masters and pilots under given environmental circumstances), and finally in the mathematical model- based ship automatic control of ship manoeuvres. In the most general case the current is really non-uniform and non-stationary. The latter is however get round by the practically adequate quasi-stationary assumption. An alteration in both magnitude and direction and in a vertical profile (for deep draft vessels in shallow waters, where the current vanishes near the bottom) is commonly regarded while dealing with the non-uniform sea current effect. Moreover, the same spatial distribution of the current affects different ships quite unlikely, dependent upon their size and the underwater hull shape- longer ships are usually more sensitive under normal horizontal gradients of the current. For simplicity purposes, an average current is often adopted being more or less adequate in particular applications. In the aspect of ship hydrodynamics, the influence of local transverse cross- current velocity (in ship's body axes) on the sectional (elementary) sway force and yaw moment, and thus the effect of the lateral velocity total spreading upon the resulting force and moment, is rarely known in the reliable way. Such a research is presently rather a field of the computational fluid dynamics than the physical scale model platform." @default.
- W2165092093 created "2016-06-24" @default.
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- W2165092093 date "2004-01-01" @default.
- W2165092093 modified "2023-09-24" @default.
- W2165092093 title "A UNIFORM CURRENT IN SHIP MANOEUVRING MATHEMATICAL MODEL" @default.
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