Temat: manoeuvrability - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wind effect simulation system in model tests of ship manoeuvrability
Autorzy:: Bednarek, A.
Jóźwiak, R.
Powiązania:: https://bibliotekanauki.pl/articles/258700.pdf
Data publikacji:: 2007
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: ship manoeuvrability
wind
wind effect simulation
Opis:: Dependence on hydro-meteorological conditions in the test area is an “Achilles’ heel” of physical experiment used for assessment of ship manoeuvrability. Aerodynamic forces and moments generated on the ship upperworks distort significantly the measured values. The paper presents new testing tool in the form of physical simulation of wind effect enabling quantitative evaluation of distortion of the measurement results. Another feature of the system enabling compensation of real atmospheric conditions prevailing during the experiment is also presented. The wind effects simulation arrangement includes board data acquisition and processing system, automatic control system and executive system consisting of industrial fans.
Źródło:: Polish Maritime Research; 2007, S 2; 64-67
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Bank effect and operation of inland waterways vessels
Autorzy:: Kobyliński, L.
Powiązania:: https://bibliotekanauki.pl/articles/359620.pdf
Data publikacji:: 2014
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: inland waterways shipping
bank effect
ship manoeuvrability
training in ship handling
Opis:: Inland waterways vessels operate in waters of restricted depth and restricted width with cross-section of the waterway of different profile. These conditions affect hydrodynamic forces acting on the vessel and in consequence they affect their operation. There are several hydrodynamic effects present in inland waterways. Restricted depth and cross-section of the canal or river affects resistance of the vessel and hydrodynamic characteristics of the propeller and in consequence propulsive efficiency. Another effect is caused by modification of pressure distribution around vessel body resulting in change of draft, so called squat. Finally in narrow fairway lateral forces on the vessel are created and in case of non-symmetrical position of the vessel, those forces are also non-symmetric and causing that the vessel is pushed to one side. This affects safe handling of the vessel and requires understanding and skill of operator. This problem is discussed in the paper.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 37 (109); 50-55
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Estimation of hydrodynamic coefficients from results of real ship sea trials
Autorzy:: Kim, D.
Powiązania:: https://bibliotekanauki.pl/articles/260199.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: ship manoeuvrability
system identification method
hydrodynamic coefficients
sea trials
mathematical optimization
Opis:: This paper suggests an estimation method for ship’s hydrodynamic coefficients, which is based on the system identification method that calculates an optimum value in a mathematical way. For the purpose of modelling existing ships, this study collects real ship sea trial data as benchmarks. Prior to the optimization, a sensitivity analysis is carried out for easy and effective optimization. The simulation results using optimized coefficients agree well with corresponding benchmarks. Following this, with various trim and draught conditions, this study suggests new estimation formulas that concern all trim and draught conditions. Simulation results applying the estimation formulas are satisfactory in regard to a corresponding benchmark, compared to a result obtained by using an existing regression formula.
Źródło:: Polish Maritime Research; 2018, 4; 65-72
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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