In the paper, a finite element analysis of electromagnetic forming is considered for the bound electromagnetic fields with the mechanical motion of a deformable body. Simulation of transient electromagnetic field during its formation and structure mechanical analysis performed on the package ANSYS. The complexity of the iterative modeling process implementation is considered.

Keywords:
Electromagnetic forming, iterative modeling process, ANSYS

Avtonomova L.V., Bondar S.V., Stepuk A.V. Features of modelling of electromagnetic process of deformation. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 6-10.

Outcomes of development and test check of discrete model of the heat-transmission process in units with a tubular surface of heat exchange and with an external cutting spiral – tape ribbing represented. Possibility of simulation, his self descriptiveness and availability on the material and temporary expen-ditures is placed.

Keywords:
Discrete model, external cutting spiral – tape ribbing

Babkova N.V., Galuschak I.V., Gorbatenko V.Ya., Nikitin A.M., The discrete model of heat transfer in finned tubes. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 10-21.

The analytical method for the formation of requirements for accuracy of inertial sensors of the integrated navigation system of aircraft has proposed. The method is based on an analysis of the influence of instrument errors on the coordinate navigating error at various air maneuvers of the aircraft. The requirement to the instrumental errors of inertial sensors of the middle class accuracy has formulated.

Keywords:
Inertial sensors, instrumental errors, middle class accuracy

Bagmut I.A., Uspenskiy V.B. Development of requirements for instrumental errors of the inertial unit integrated navigation system. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 22-28.

The variant of account two of shells of rotation in the form of the tor is offered at action of internal pressure. The considered shells have a general axis and their appropriate surfaces are placed on certain distance one from another. The analysis of distribution of contact pressure will be carried out which arises on a local sites between shells at action of static loading. The account of a task is carried out on a basis of the vectorially nonlinear theory of shells in view of deformations of cross shift.

Keywords:
Shells of rotation, contact pressure, nonlinear theory of shells

Vereschaka S.M. Unilateral contact spherical shells of heterogeneous material. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 29-34.

Mechanical system consists of hingedly supported medium-thickness rectangular plate and vibration absorber. The non-stationary concentrated load, which initiates vibration, is acting on the plate. The results of unknown load’s identification are presented. The problems are reduced to the system of first-kind Volterra integral equations, which is solved numerically with using of Tikhonov’s regularization method.

Keywords:
Non-stationary concentrated load, Tikhonov’s regularization method, first-kind Volterra integral equations

Voropay A.V. Nonstationary vibrations of a rectangular plate with damper. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 42-48.

A method has been developed for analysis of the dynamic stress state in turbine blades, which is occurring in forced harmonic vibrations. The proposed approach is based on a superposition of the displacement and stress normal modes, and provides a substantial reduction of the problem size for large finite element models.

Keywords:
Dynamic stress state, turbine blades, finite element models

Grican S.O., Larin O.O. The study of the dynamic stress state in the blades of turbomachines method combined decomposition to their own forms of stresses and displacements. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 54-62.

In the given work the object of research is a comparative analysis of various variants of implementation pressure coupling which are under the influence of contact loadings. The work purpose is research of stress-strain state (SSS) of the profiled joints and, on the basis of these data, determination of optimal variant of connection.

Keywords:
Pressure coupling, profiled joints

Danilov D.V., Andreev A.G. VAT profile of the coupling under the influence of contact loads. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 63-76.

In this work investigated the effect of erosion-corrosion wear on natural frequencies of the pipeline. A method is proposed estimates the residual life of the pipeline, based on an analysis of the natural frequencies of the system.

Keywords:
Erosion-corrosion wear, pipeline

Demidov P.N., Trubaev A.I. Prediction of residual life of pipelines with regard to flow-accelerated corrosion. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 77-84.

The problem of dynamics research of system “vessel reinforcement” in operating shafts with broken geometry, being under effect of rocks movement, is considered in article. The research is based on modeling in program complex SolidWorks Simulation SolidMotion. Dependences of contact loadings on guides changing, caused by lifting vessels, from geometrical parameters of guides profiles are received.

Keywords:
System “vessel – reinforcement”, contact loadings

Ilina S.S. Study of the influence of profile parameters of the conductors on the dynamics of skips in trunks with broken geometry. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 85-93.

In the paper the calculation of the stress-strain state of a pneumatic tire, loaded by internal pressure and axial force is presented, taking into account the geometric, physical and structural nonlinearities. It is estimated the influence of each nonlinearity to the results of calculations.

Keywords:
Pneumatic tire, nonlinearity

Kondrikova A.A., Larin O.O. Simulation of contact interaction of pneumatic tyres with the road taking into account the geometrical and physical nonlinearity of deformation. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 94-101.

The numerical results of long-term strength investigations of thick-walled cylinder – one of the main structural elements of technical autoclave, are described in the paper. The intermediate results were verified by comparison the computed and experimental data. The critical number of loading and heating cycles was obtained.

Keywords:
Thick-walled cylinder, long-term strength

Korytko Yu.N. Computational study of thermal Cycling durability of thick-walled cylinder of the autoclave hydrothermal synthesis. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 101-106.

Modelling of the base of turbine unit К-300-240 ХГТЗ are complete. The out calculations from own vibrations are given. By results of the analysis of own frequencies and forms the revealed elements of the base which have the greatest vibration at turbine unit work. Mathematical models and calculations are executed on the basis of finite element method.

Keywords:
Modelling, turbine, own vibrations

Krasnikov S.V. Modeling and analysis of vibration characteristics of the Foundation unit capacity of 300 MW. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 107-111.

A method of evaluating creep response of the multipass welding based on the micro-macro mechanics approach is introduced. Creep material properties for equivalent weld material by known properties of weld metal grain type zones are found. As an example of macro model analysis of the welding, the creep calculation of the tube with the welding under the uniform pressure on the inner bounds was performed.

Keywords:
Multipass welding, creep, tube

Lvov I. Anisotropic creep multipass weld. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 111-119.

The purpose of this paper is to introduce an energy-based anisotropic damage model for predicting fatigue life and evaluation of progressive damage in composite materials. In this work we postulate that the damage state is sufficiently described by the second-rank symmetric damage tensor. The model is based on the assumption that the damage growth rate in composite materials depends on the value of elastic strain energy. The model parameters, which determine the damage accumulation rate, were established by the results of fatigue experiments of glass fabric laminates STEF-1. It is shown that the proposed theory reflects well fatigue damage accumulation process and fracture of glass fiber composite.

Keywords:
Anisotropic damage, composite materials, glass fiber composite

Movaggar A., Lvov G.I. Anisotropic model of fatigue deformation of fiberglass composite. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 119-127.

In the Kelvin functions of negative index is used to solve the oscillation problem of a flow rate of grain mixture, vibroviscosity which is a linear function of the coordinate normal to the plane of oblique vibrosieve. Derived formulas tested by calculations.

Keywords:
Kelvin functions, grain mixture

Olshanskiy V.P., Olshanskiy S.V. Harmonic oscillations of the inhomogeneous of the separated layer of grain on the flat vibropresata. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 127-135.

In the paper, analyzed remaining stresses of the vessel with dents, what loaded internal pressure with high corrosion ambience. The examined process of the forming the dent and removing remaining stress in progress of hydro-processing the vessel. Problem analyzed on base of the finite elements method, with provision for physical and geometric nonlinear.

Keywords:
Remaining stresses, vessel with dents, hydro-processing

Onackiy R.L. Residual stresses in vessels with dents and removing them in the process of hydrotreated. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 135-141.

We are considered ways of the increase of turbogenerator reliability, which are based on the decrease of mechanical stresses, statical and dynamical displacements and their derivatives. We are presented the results, which are based on the factory and station researches.

Keywords:
Turbogenerator, mechanical stresses

Osternik E.S. Mechanical parameters to assess the reliability of turbogenerators split design. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 142-156.

For the process of isothermal cold ring-rolling mathematical model using numerical methods to predict the stress-deformed state of the tool (mandrel) was developed. The stability of the mandrel with existing technological process was analyzed and the correctness of the chosen process parameters was justified. On the basis of numerical experiments were proposed methods to improve the tool life.

Keywords:
Cold ring-rolling, mandrel, tool life

Simson E.A., Ovcharenko V.V., Demidov V.I., Prevo I.D., Nazarenko S.A. Cold rolling of billets bearing rings. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 156-161.

A mixed variational functional have been used for solution of initial-boundary-value problem of dynamic creep for initial-anisotropic bodies. Variational-structural R-functions theory method in combination with the method of solutions continuation over time are presented in the paper. State equations of dynamic creep for materials are specified in incremental form relative to irreversible creep strains rates and damage parameter. As an example, numerical estimations of dynamic creep-damage problem for the cylinder under internal pressure are given.

Keywords:
Dynamic creep, initial-boundary-value, R-functions theory

Sobol V.N. Mixed variational functional for numerical studies of dynamic creep initial-anisotropic solids. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 161-165.

The guided motion problem of elastic body appers in process of spacecraft control law designing. One of possible methods of suchlike problem solution is the FEM- based method of dynamic analysis with account of elastic disturbances. As a result of performed analysis the method which allows simulating the controlled motion of elastic body has been developed.

Keywords:
FEM, spacecraft, dynamic analysis

Schastlivec K.Yu., Pogorelov S.Yu., Marusenko S.I. Mathematical modeling of controlled motion of the rod model spacecraft. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 165-174.

On the basis of the analysis a circuit diagram of the typical ammoniac refrigerating machinery (ARM), technological process which takes place also breakdown susceptibilities ARM taking into account the conditions, which characteristic for potentially dangerous objects (PDO) in territory of Ukraine, danger factors «external influence» that can lead to emergency occurrence on the ammoniac refrigerating machinery are defined. Procedure of definition factors of safety for the basic knots of the ammoniac refrigerating machinery, as bases process of definition priorities and management risk of occurrence failure on object of control is offered.

Keywords:
Ammoniac refrigerating machinery, object of control, breakdown rate

Taraduda D.V., Shevchenko R.I. The definition of safety factors the main elements of the ammonia refrigeration plant when exposed to risk factors “outside influence”. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 175-186.

The analysis of stress-strained state in the field of ideal and imperfect contact interaction of an elastic body with absolutely rigid movable and fixed insertions are given. The calculations are obtained by the R-functions method for a Reissner functional.

Keywords:
R-functions method, Reissner functional

Tarsis K.Yu. Comparison of stress-strain state in the contact zone of a composite body with a movable and a stationary rigid inserts the R-functions method. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 186-190.

The comparative analysis of influence of the basic constructional parameters on Torsions flexibility of crankshaft is executed at use of traditional empirical formulas and of finite elements method.

Keywords:
Empirical formulas, finite elements method

Tarsis Yu.L. On the application of empirical formulae for determination of the torsional flexibility of the knee of the crankshaft. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 191-195.

Dependences for definition of speeds of movement of fraction on a shovel surface thrower fraction and speed of portable movement are received at an exit from the turbine thrower fraction. The area of intensive deterioration of the shovels which reason are forces of a sliding friction from concentration of pressure at the expense of normal forces inertia of koriolis which cause considerable tangents of pressure is established. The mechanism of intensive deterioration of shovels of turbines thrower fraction is opened. Practical recommendations of engineering character about definition of the geometrical sizes of shovels thrower fraction and frequencies of rotation of their power shafts reducing intensity of deterioration of shovels are develo

Keywords:
Turbine, deterioration, normal forces inertia of koriolis

Fedorchenko V.G., Podlesnyy S.V., Denschikov A.Yu. The dynamic characteristics of the working environment of Derbenyov and their influence on the intensity of wear of turbine blades. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 196-202.

An approach to model development of a material based on artificial neural network describing plastic flow was considered. Model’s feature is possibility to model flow behavior of material in wide range of strain, strain rate (0,001…105 s−1) and temperature (20-1000 °С). For model implementation the neural network based on the perceptron with one hidden layer has been used. On an example of the experimental family of strain curves for AISI 45 the benchmark analysis of training for various variants of the learning data preparation was carried out.

Keywords:
Artificial neural network, perceptron, AISI 45

Havin V.L., Ogorodnik O.A. Model plastic sostoyaniya material for a wide range of temperatures and strain rates based on neural network. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 202-209.

Keywords:

Morachkovskij O.K. Up to 90-rcca of Professor A. V. Burlakov. As a scientist, teacher, person. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 3-5.

Axisymmetric model of bolt connection based on the finite-element approach has been designed, taking into account the contact interaction. The coefficients of stress concentration at the fillets under the heads of bolts holding the impeller of turbines have been determined. A comparative analysis of the results with those given in the references has been conducted.

Keywords:
Axisymmetric model, coefficients of stress concentration

Vodka A.A., Stepchenko O.S., Trubaev A.I. Investigation of the stress-strain state of bolting the impeller of the turbine. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 34-41.

The inverse problems solution based on the direct problem of non-stationary vibrations of an elastic isotropic medium with a cylindrical cavity is considered. Distribution of axisymmetric deformation waves which are caused by displacements on the surface of an elastic body. A numerical calculations’ example for the inverse problem are presented.

Keywords:
Non-stationary vibrations, cylindrical cavity, axisymmetric deformation waves

Voropay A.V. Identification of kinematic loading on the surface of the cylindrical cavity of the elastic space. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2011. No. 52. Pp. 48-54.