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Przyspieszenia i opóźnienia wzdłużne oraz przyspieszenia poprzeczne w normalnym ruchu drogowym

Reza Adam

Paragraf na Drodze

2020

Nr 1

51--67

Przyspieszenia, opóźnienia hamowania i przyspieszenia poprzeczne odgrywają ważną rolę w opiniowaniu wypadków drogowych. Cytowane w artykule wyniki badań pozwalają na określenie przedziałów różnych parametrów dla normalnego, typowego udziału w ruchu drogowym przy wykonywaniu różnych manewrów. Możliwe jest uwzględnienie płci i wieku kierowcy.

The knowledge of acceleration, braking deceleration and transverse acceleration play an important role in road accident expert reporting. The test results quoted in the paper enable the identification of the ranges of various parameters of various driving manoeuvres in ordinary typical participation in road traffic, including the driver’s sex and age.

Modelling of seakeeping qualities of open-top container carriers in the preliminary design phase

Cepowski T.

Polish Maritime Research

2011

nr 2

19-27

In this paper are presented problems of modelling seakeeping qualities of open-top container carriers in the preliminary design phase. Approximations of accelerations and occurrence rate of green water ingress to holds are presented in function of main ship design and wave parameters. The approximations have been elaborated by applying theory of artificial neural networks in the wide range of ship hull dimensions and forms, while ship motion and wave parameters have been limited to real operational conditions described by means of the so called operational scenario. Such approach has made it possible to reach high accuracy of approximation and simple structure of mathematical model simulatneously.

Determination of optimum hull form for passenger car ferry with regard to its sea-keeping qualities and additional resistance in waves

Cepowski T.

Polish Maritime Research

2008

nr 2

3-11

This paper presents a method which makes it possible to determine optimum hull form of passenger car ferry with regard to selected sea-keeping qualities and additional resistance in waves. In the first phase of investigations a hull form characterized by the highest qualities was selected from the list of similar ships. Next, its optimum dimension ratios were determined. Design criteria were formulated by using a method based on deterministic scenarios, but objective functions of partial targets were determined in the form of artificial neural networks. To select the best design variants elements of fuzzy logic were used, that made it possible a.o. to show merits of the design by means of linguistic variables. Such approach made it possible to find the best hull form and its dimensions from the point of view of all considered criteria simultaneously.