## МИТ № 1 2010

**ABSTRACTS**

## INTELLIGENCE SYSTEMS OF NEW GENERATIONS: PROBLEMS AND PROSPECTS

Nechaev Y. I.

The Sankt.-Petersburg State Marine Technical University

e-mail: petr_oleg@mail.ru tel: (812) 369-63-37

The new stage of intelligence technologies realization connected with the orientation toward the chain “modeling – forecast – decision-making” and formal body of mathematics based on nonalgorithmic control process is viewed. The influence of human factor and the increase of effectiveness of human-computer interaction are discussed. The problem of making use of synergy principles during the process of creation of intelligence system is analyzed.

Key words: inferences, dynamic scenes, computational science.

## DESIGNING OF THE SHIP IN VIEW OF PROCESSES OF DESTRUCTION AND RESTORATION

Gaikovich A. I.

The Sankt.-Petersburg State Marine Technical University

e-mail: a_gaikov@mail.ru

During designing the ship it is necessary to take into account her possible damages during operation. The model of development of failure which can be used on early design stages is given. The way of the account of requirements of survivability in a problem of optimization of basic elements of the ship is offered.

Key words: destroying factor, survivability, columns of development of failure, structural damage, optimization.

## RESEARCH OF ULTIMATE STRENGTH OF HULL STRUCTURES AT SHIPS COLLISIONS

Rodionov A. A., Gou Jun

The Sankt.-Petersburg State Marine Technical University

e-mail: rodionovsmk@yandex.ru

It is carried out research of problems of limiting strength of ship structures, damaged at collision. The wide spectrum of responses of the designs characterized by plastic mechanisms of rotation and shift at static and dynamic loading is considered. Estimations of limiting strength on the basis of the limiting theory and modern models of a method of finite elements are studied. Recommendations for practice design are given at real designing.

Key words: beam, ship frame, ultimate strength, limiting analysis, finite element method, shear deformation.

## ELASTICITY THEORY WITH FREE ROTATION. WAVE PROPAGATION IN LINEAR ISOTROPICAL CONTINUOUS MEDIUM

Zdanchuk E. V., Lalin V. V.

Saint-Petersburg State Poyitechnical University

Tel.: 8 (812)552-60-87

A new classification of continua. As a result, have discovered a new class of models of continuous media, called like membrane environment with free rotation. The report displays the basic equations of linear elastic membrane environment with free rotation. Discovered a new effect-the possibility of existence of harmonic vibrations of the angles of rotation with zero displacement vector.

Кеу words: solid medium, membrane environment with free rotation, equation linear elastic membrane environment with free rotation.

## MODELLING QUESTIONS AT DESIGNING OF MECHANICAL DEVICES OF SPACE VEHICLES

Testoedov N. A., Mashukov A. V., Dvirnyi G. V.

JSC «Information Satellite Systems» Academician Reshetnev ”

e-mail: lalin@cef.spbstu.ru

The preliminary design stage – mathematical modelling of transformed mechanical devices is considered. For opened reflectors and solar batteries formation of geometrical and kinematic schemes taking into account their integration into a space vehicle design is offered. Efficiency of design studies proves to be true the subsequent tests of devices independently and as a part of a space vehicle breadboard model, and the maintenance of mathematical modelling of such devices is established on the basis of the given approach.

Кеу words: mathematical modeling, mechanical devices, spacecraft.

## CONSTRUCNING THE LONG-TEREM STRENGTS OF SPATIAL STRUCTURES OF AN ISOTROPIC MATERIALS

Piatikrestovskiy K. P.

The Central Scientific Research Institute of building constructions

e-mail: stroymex@list.ru

The issues of long-term strength of ribbed shells with frame and plywood sheathing, located in the plane stress state. A retrofit mechanical model and the criterion of long-term strength of anisotropic materials

Кеу words: long-term strength of ribbed shells, mechanical model, the criterion of long-term strength of anisotropic materials.

## INVESTIGATION LARGE DEFORMATIONS USING THE LEFT CAUCHY – GREEN TENSOR

Golovanov A .I., Sultanov L. U.

Kazan State University

e-mail: Alexandr.Golovanov@ksu.ru

The algorithm of investigation of large deformations of hyperelastic solids using the left Cauchy – Green tensor is considered. The stressed state is represented by Cauchy stress. The general equation is received. An incremental method is used. Numerical computations illustrate ability of the described approach.

Кеу words: deformations of hyperelastic solids, Cauchy – Green tensor, incremental method, computations illustrate ability of the described approach.

## MODELLING OF FALLING OF A SHIP ONTO WATER

Taranukha N. A., Chizhiumov S. D., Zhurbin O. V.,

Burmensky A. D., Zhurbina I. N.

Komsomolsk-na-Amure State Technical University

e-mail: taranukha@knastu.ru

We consider the numerical simulation of the entrance in an ideal incompressible fluid bodies with deadrise bottom with the use of boundary element method. Use the conversion system of equations, allowing to reduce its order and thereby substantially reduce the computational cost.

Кеу words: the numerical simulation of the entrance in an ideal incompressible fluid bodies with deadrise bottom, the conversion system of equations, allowing to reduce its order.

## OPTIMAL DESIGN OF GEOMETRICALLY NONLINEAR STRUCTURES AND SENSITIVITY ANALYSIS AT SIMPLE AND MULTIPLE CRITICAL POINTS

Sergeyev O. A., Engineering Company “Express plus” at Gorky Automobile Plant,

Kiselev V. G., Nizhni Novgorod University,

Sergeyeva S. A., Nizhni Novgorod State Technical University

e-mail: ppsoa@rol.ru

Criteria for the classification nonmultiple and multiple critical points and propose an analytical sensitivity

Кеу words: Criteria for the classification nonmultiple and multiple critical points and propose an analytical sensitivity analysis of multiple critical load of buckling and nonlinear displacement design.

## A COMPARATIVE ANALYSIS OF NUMERICAL-ANALITICAL AND FINITE-ELEMENT MODELLING OF ELASTIC SYSTEMS

Matrosov A. V., St.-Petersburg State University,

e-mail: avmatrosov@mail.ru

Ulitin V. V., St.-Petersburg State University of Refrigeration and Food Engineering

A comparative analysis of solutions of some complex elastic systems under conditions of plane elasticity problems by the method of finite elements with numerical-analytical solutions of these structures, built using a method based on the general solution for a rectangular elastic anisotropy field.

Кеу words: complex elastic systems, numerical-analytical solutions of these structures, a method based on the general solution for a rectangular elastic anisotropy field.

## EFFECTIVE METHODS FOR NONLINEAR FINITE ELEMENT ANALYSIS OF FERROELECTROELASTIC PROBLEMS

Semenov A. S., Le-Zakharov S. A., Dodonov P. A., Melnikov B. E.

St.-Petersburg State Polytechnical University

e-mail: Semenov.Artem@googlemail.com

Liskowsky A. C., Neumeister P., Balke H.,

Dresden University of Technology

Standard methods for solving nonlinear boundary value problems associated segnetoelektrouprugosti for materials with nonconvex characteristic diagram shows an extremely low rate of convergence of iterative procedures and impose very strict limitations on the value of step loading. To overcome these shortcomings are considered alternative variational formulations used implicit methods of integration in the form of “predictor-corrector” and are special forms of the governing equations.

Кеу words: alternative variational formulations used implicit methods of integration in the form of “predictor-corrector” and are special forms of the governing equations.

## ALGORITHM AND SOFTWARE FOR REALIZATION OF THE REQUIREMENTS TO FATIGUE

**DURABILITYS OF COMMON RULES ****МА****C****О**** **

Khai Pham

The Sankt.-Petersburg State Marine Technical University

e-mail: phamhongkhai@yahoo.com

The requirements to Fatigue strength for a units of ship constructions permitting surveyed to receive the most rational solution at a stage of projection of hull structures of a vessel. The ways of an estimation of Fatigue strength (longevity) are regulated by rules МАCО – CSR-T, entering in an operation in 2006.

Key words: a Fatigue strength, tank vessel, double sides, units, rule МАCО.

## THE FEATURES OF KNOWLEDGEBASE FOR CONTROL OF NON-STATIONARY SYSTEMS DYNAMICS

Petrov O. N.

The Sankt.-Petersburg State Marine Technical University

e-mail: petr_oleg@mail.ru tel: (812) 430-79-88

An approach to the synthesis of intelligence system of control of non-stationary object dynamics is developed in the work under consideration. The integrated intelligence system as a computing environment of new generation is viewed, current tasks are analyzed. The functioning logic of dynamic knowledgebase with the consideration of non-stationarity of observable processes is discussed.

Key words: dynamic knowledgebase, non-stationary systems, decision-making.

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