МИТ № 4 2013

CONCEPT DESIGN OF A MULTIPURPOSE MANNED SUBMERSIBLE FOR ULTRA SHALLOW DIVING DEPTH AND PRESSURE HULL STRUCTURAL ANALYSIS

Zhestkov K. G.
Saint-Petersburg State Marine Technical University
tel.: +7 911 171-32-07
The article contains some issues on the concept design of a multipurpose manned submersible for ultra shallow diving depth. It was developed as a part of the R&D job. Structural analysis of pressure hull was done per Russian Classification Rules and finite element modeling. The ways of further investigations were traced.
Key words: multipurpose manned submersible, advanced design, layout, pressure hull, flat nonshelved bulkhead, analytical structural design

STUDY OF VORTEX RESISTANCE OF MOVING VESSEL

Gotman A. Sh.
Federal Budget educational Institution of higher professional education «Novosibirsk state academy of water transport»
e-mail: Agotman@yandex.ru
tel.: (383) 217-11-68
In the paper the vortex resistance of displacement vessels is considered. There is shown that the shock, which occurs on the bow of moving ship, is the source of the vortex resistance, Mechanism of interaction of vortex and wave fields around the moving ship is revealed. Two ways of further research are selected to develop a method of calculating residual resistance of displacement vessels are selected.
Key words: wave resistance, friction resistance,  analytical grid, ship’s versiera

INFLUENCE OF THE UNDERWATER VEHICLE HULL SHAPE ON ITS HYDRODYNAMICS CHARACTERISTICS

Dukarski A. O., Tkachenko I. V., Tryaskin N. V., Chepurko S. I.
Saint-Petersburg State Marine Technical University
e-mail: igor.v.tkachenko@mail.ru
tel.: +7(921) 574-31-67
The results of numerical investigation of hydrodynamics of underwater vehicles with different hull shapes are presented. The Reynolds averaged Navier-Stokes equations coupled by k-εturbulence model are used. OpenFOAM is applied for numerical simulation. The force coefficients are compared with experiment for the case of spheroid. The changing of the elliptical shape leads to the increasing of the drug force and appearing the initial lift force and moment.
Key words: viscous fluid, turbulence, vortices, hull shape

THE MONTE CARLO METHOD AT THE CONTROL OF THE STRENGTH OF THE VESSEL IN EMERGENCY SITUATIONS

Burakovskiy P. E., Nechaev Yu. I.
Kaliningrad state technical university
tel.: 8-4012-36-43-38
e-mail: e_burakovsky@mail.ru;
tel.: 8-812- 369-63-37
e-mail: nechaev@ifmo.mail.ru
Discusses the problem of the control of emergency situations connected with the loss of strength of the vessel in operation. Focuses on the implementation of the Monte-Carlo method in the functioning of the airborne intellectual system. The algorithm of the Monte-Carlo method and procedure of its implementation in the framework of fuzzy formal system. The ways of improving the application on the high-performance onboard computer complex.
Key words: Monte-Carlo method, the strength of the vessel, emergency situation, the theory of accidents

APPLICATION OF FE-ANALYSIS IN ENSURING THE PRINCIPAL CONSTRUCTIVE SOLUTIONS FOR UNDERWATER VEHICLES RUDDER SYSTEMS USING COMPOSITE MATERIALS

Khazova I. A., Tumashik G. A., Yartsev B. A.
Krylov State Reseach Centre
The paper discusses the results of calculation and design of studies aimed at introducing modern composite materials as structural materials of underwater vehicles rudder systems. The principal possibility of a significant improvement in weight and vibration-strength characteristics of rudder systems in comparison with analogues made of traditional materials is demonstrated.
Key words: FE-analysis, composite materials, rudder systems

ABOUT THE INFLUENCE OF ARBITRARY LOCATION OF THE SHIP ALONG THE BREADTH OF A CANAL ON THE AMPLITUDES OF MOTIONS

Semenova V. Yu., Soe Kyaw Thu
Saint-Petersburg State Marine Technical University
tel.: 8-905-229-71-98
e-mail: sem_viktoria @mail.ru

This paper is about the three dimensional potential problem of the motions of a ship, which is arbitrarily located along the breadth of the canal of restricted depth. Numerical panel’s method and the method of mirror images are used for the solution of this problem. The investigation of the influence of the location of the ship along the breadth of a canal on the added masses and damping coefficients, exciting forces and amplitudes of ship motions is given. The necessity of the consideration of the influence of transverse motions of a ship is showed.
Key words: canal of restricted depth, method of mirror images, Green function, added masses of a ship, damping coefficients, motion responses

THE INFLUENCE OF MOISTURE-VAPOR MIXTURE AT THE EJECTION RATIO OF PARALLEL-CONNECTED GAS-GAS JET DEVICES WITH A CONICAL MIXING CHAMBER

Apollova A. V., Shamanov N. P.
Saint-Petersburg State Marine Technical University
tel.: (812) 714-06-51
e-mail: np@smtu.ru
In this paper the concept of mass vapor content in relation to the gas mixtures used in the jet devices. The basic equation developed to calculate the impact of mass vapor content on the ejection ratio. Graphically shows the calculation results. The features of the influence of humidity on the ratio ejection of the jet devices.
Key words: Gas-gas jet device, conical mixing chamber, ejection ratio, mass vapor content

THE INFLUENCE OF THE LENGTH OF THE MIXING CHAMBER TO THE INJECTION EFFICIENCY FOR JET DEVICES WITHOUT DIFFUSER

Mazilevsky I. I., Shamanov N. P.
Saint-Petersburg State Marine Technical University
tel.: (812) 714-06-51
e-mail: np@smtu.ru
The results of theoretical and experimental study of the influence of the ratio of the mixing chamber jet device to its diameter at the injection rate. It is experimentally proved the existence of optimum injection rate depends on the ratio of the length of the mixing chamber jet device to its diameter. A mathematical model describing the effect of the ratio of the mixing chamber jet device to its diameter at the injection rate.
Key words: length of the mixing chamber, jet devices without the diffuser, injection rate, injector

INVESTIGATION OF THE INFLUENCE OF VISCOSITY AND THERMAL CONDUCTIVITY OF THE MEDIUM ON THE PROPAGATION OF SOUND THROUGH THE HOLE IN THE HARD-SCREEN

Legusha F. F., Nalivkin P. V., Oleynik M. M.
Chizhov G.V.
State Marine Technical University of St. Petersburg
e-mail: legusha@smtu.ru; gohak4@gmail.com
tel.: (812) 757-10-55
In this paper we propose a way to calculate acoustic radiation arising when acoustic waves pass through a round hole that is placed in an infinite thin rigid screen, as well as through a pipe section inserted into the screen. Calculated data for heat radiation power in an acoustic boundary layer of the specified surfaces and sound attenuation coefficients for them is being given.
Key words: sound waves, power acoustic radiation, heat, sound attenuation factor

ON THE DEGREE OF INTELLECTUALIZATION, ROBOTIZATION AND INTEGRATED  EVALUATION OF ORGANIZATIONAL AND TECHNOLOGICAL PROCESSES ON AN ENTERPRISE AND  SHIP

Evseenko S. M., Skorokhodov D. A.
Establishment of the Russian academy of sciences Institute of transport problems after N. S. Solomenko
e-mail: skorohodda@mail.ru
tel.: (812) 321-95-68
The present paper contains a brief overview and analysis of the currently used terminology applied for the intellectualization and robotization of organizational and technological processes, enterprises, vessel, ship (water, air and space), as well as methods for determining the assessment of these processes and their compliance with the current development level of science and technology. There are many different interpretations of these terms, which do not always reflect the views of experts in these professional fields. Here we  review the most well-known definitions  and introduce our own approach to the assessment of the appropriate levels and degrees, and integrated degree.
Key words: a terminology, a intellectualization, a robotization a mechanization, a automation, a degree, a level, a effectiveness, a process, a method, a requirement, a automat, a control, a information,  a estimate.

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