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5 TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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MET System in Ukraine

100%

Miyusov M. V. , Zhukov D. S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2010

tom Vol. 4, no. 4

465--470

It is believed that Ukraine is one of the largest seafarers’ suppliers to the world maritime fleet. The vast and diverse system of waterways and lakes in addition to the tradition of seafaring and maritime history which dates back more than 200 years create the necessary basis for the government which considers it more important to provide graduates with the full education rather than merely to produce 'vocational' specialists. Moreover Ukraine has already made some major steps on the road to Euro integration having taken part in the Bologna process. Therefore it’s not surprising that on 15 January 2005 a new resolution of the Cabinet of Ministers of Ukraine was approved. The Odessa National Maritime Academy(ONMA) was the first to visualize it by means of the new-presented system of MET.

Construction and analysis of mathematical models of hydrodynamic forces and moment on the ship's hull using multivariate regression analysis

100%

Kryvyi O. , Miyusov M. V.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2021

tom Vol. 15 No. 4

854--864

To analyse the existing mathematical models of hydrodynamic forces and moment on the ship's hull and build new effective ones, an approach based on multivariate regression analysis is suggested. As factors (regressors), various dimensionless ratios of the geometric parameters of the vessel, such as length, breadth, draught, and block coefficient, were taken. When analysing existing mathematical models of hydrodynamic derivatives and building new ones, the value of the multiple correlation coefficient R and the value of standard errors were estimated. The significance of the models and the significance of all factors (regressors) included in the model were assessed using Fisher's and Student's criteria. As a result, new adequate mathematical models have been obtained for hydrodynamic constants with a high degree of correlation and an excellent level of significance of regressors.

Increasing Maritime Safety: Integration of the Digital Selective Calling VHF Marine Radiocommunication System and ECDIS

80%

Miyusov M. V. , Koshevoy V. M. , Shiskin A. V.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2011

tom Vol. 5, no. 2

159--161

A general project for simplification of VHF DSC radiocommunication for navigators and for increasing DSC efficiency by integration of the DSC VHF radio equipment and the AIS – ECDIS vessel’s system is presented. Proposed measures are to contribute to further developments in maritime radiocommuni-cation systems, technology and progress of e-navigation strategy.

Construction and analysis of new mathematical models of the operation of ship propellers in different maneuvering modes

80%

Kryvyi O. , Miyusov M. V. , Kryvyi M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2023

tom Vol. 17 No. 1

95--102

The influence of the curvilinear movement of the ship on the operation of the propeller was studied. It is shown that even at small values of the drift angle and the angular velocity of the vessel, the transverse component of the force on the propeller and the moment are non-zero and cannot be neglected. The existing and proposed new effective mathematical models of the longitudinal and transverse components of force and moment caused by the operation of the ship's propeller are analyzed. Simple expressions for the coefficients of the propeller thrust and the moment on the propeller shaft, the wake fraction, the thrust-deduction factor, and the flow straightening factor on the propeller at any drift angles and angular velocity are obtained. Numerical analysis of the obtained dimensionless components of forces and moments caused by the operation of the propeller is carried out, and their adequacy is shown. It is shown how the specified parameters change for all possible values of the drift angle and angular velocity. For a few commercial vessels of various types, technical characteristics and calculated dynamic parameters are given for the construction of mathematical models of propeller operation during curvilinear movement of the vessel.

Analysis of known and construction of new mathematical models of forces on a ship's rudder in an unbounded flow

80%

Kryvyi O. , Miyusov M. V. , Kryvyi M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2023

tom Vol. 17 No. 4

831--839

The forces arising on the ship's rudder at different angles of attack in an unbounded flow are investigated. The components of the resulting force on the rudder are represented in terms of the rudder lift and drag forces, as well as in terms of the normal and tangential forces on the rudder. The well-known mathematical models of hydrodynamic rudder coefficients are analyzed, and their disadvantages are found. New mathematical models of hydrodynamic coefficients have been obtained, in particular, the coefficients of rudder lift and drag, which take into account the aspect ratio of the rudder, its relative thickness and can be applied to any angle of attack of the flow on the rudder. On specific examples for rudders of the NACA series, the adequacy of the proposed models and their consistency with known experimental studies are illustrated. It is shown how the rudder lift and drag change, as well as the components of the resulting force for the maximum possible range of changes in the local drift angle and the rudder angle.