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Saint Petersburg, Russia

Khalikova D.F.,Krylov Shipbuilding Research Institute
Proceedings of the International Offshore and Polar Engineering Conference

The paper stresses the ambiguity of architectural type (AT) of floating craft for exploration drilling in shallow water conditions, as well as the necessity of using the methods of multicriterion evaluation for choosing the most rational AT. The recommended methodology is the expert judgments with determination of priority number of criteria, their ranking and calculation of versatility indicator. The results of methodology validation are shown - the selection of rational AT for floating drilling unit (FDU) to be operated in shallow water sites - shallow-draft jack-up floating drilling unit (SDJUFDU). The algorithm for determining the main dimensions of the SDJUFDU with regard to its operational features in distinctly various conditions (as floating object, fixed offshore structure, and transitional mode - leg penetration into soil during installation at site) is presented. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE). Source

Korableva M.S.,Krylov Shipbuilding Research Institute
Proceedings of the International Offshore and Polar Engineering Conference

Design of ocean engineering facilities (OEF) plays a major role in Russian Continental Shelf development. Development of science and technology poses increasingly difficult and intensive challenges for design engineers of these facilities, which require high level of design solutions and more efficient project management. Therefore, OEF design management issues are gaining a special urgency. One of the problems related to OEF design management in Russian Federation today is lack of cost estimation methods to implement. More commonly, a facility construction cost forms the basis for design cost estimation today. This article contains the results of analysis of current methods for evaluation and forecasting of design labour intensity, as well as methods for cost estimation of design in shipbuilding and related industries. It also includes statistic data of OEF design costs. Various approaches for cost estimation and pricing methods for design works of ocean engineering structures are presented in the article and the selection problem for the best approach to estimate the OEF design costs is considered. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE). Source

Palii O.M.,Krylov Shipbuilding Research Institute
Mechanics of Solids

A version of an applied theory of shells of large thickness based on the introduction of force and kinematic hypotheses completing and extending the set of Love-Kirchhoff and Timoshenko-Reissner hypotheses is discussed. The complete system of equations including the elasticity relations, the geometric relations (displacements and strains), and the equilibrium equations is written out. The obtained system of equations is verified in several special cases. It is noted that the error of this theory does not exceed the squared thickness-to-radius ratio compared with unity. © 2014 Allerton Press, Inc. Source

Krasnov I.P.,Krylov Shipbuilding Research Institute
Proceedings of the International Conference Days on Diffraction, DD 2012

The concept of electromagnetic field sources consists in consideration of specific function of such values as electrical current density j, polarization P and magnetization J in classical electrodynamics and application thereof for definition and solution development of electrodynamics' problems. Specific function of j, P and J values is associated with the fact that being characteristics of the substance these values may be considered also as sources or origin of electromagnetic field generated by a body within the volume of which they are specified. Representations of Maxwell equations in the form of integrals from values j, P and J over V domain where they are specified as functions of point x V and time t (-∞,∞), obtained in this work, are demonstrative validation of this statement. © 2012 IEEE. Source

Popkov V.I.,Krylov Shipbuilding Research Institute
Acta Acustica united with Acustica

This paper examines physical and mathematical model describing the oscillations of the flexible insert with fluid. It also provides methods and instrumentation layouts to measure acoustic impedances, mechanical impedances in relation to forces and moments, acoustic and mechanical and mechanical and acoustical impedances of the flexible inserts with fluid. © 2012 S. Hirzel Verlag GmbH & Co. Source

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