The article is devoted scientific and pedagogical activity of the visible Ukrainian scientist in area of dynamics and durability of machines, twice laureate of the State bonus of Ukraine, doctor of technical sciences professor Bogomolov S. I.

Keywords:
scientific and pedagogical activity; dynamics and durability of machines.

Kedrovskaya O.V., Larin A.A., Lvov G.I. The life and career of Sergey Ivanovich Bogomolov. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 3-12.

This article examines variations axisymmetric viscoelastic cylindrical shell using the integral Laplace transform for arbitrary functions of hereditary.

Keywords:
integral Laplace transform, axisymmetric vibrations

Babadzhanova V.G. Forced axisymmetric oscillations of a viscoelastic cylindrical shell. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 12-17.

In-process the presented features of functioning of electromagnetic reciprocator, that contains the pistons with flows, united by means of general knee axle with a fly-wheel, are accommodated in the cylinders equipped by the solenoids set in dead centers.

Keywords:
piston, cylinder, solenoid, crankshaft, the battery of capacitors, the system of management

Bozhko A.E., Ivanov E.M., Ivanova Z.A. Electromagnetic piston engine. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 17-23.

The paper is devoted to the description of the problem statement as well as the method of solution for creep problems of shells of revolution, which are in conditions of joint action of periodically varying temperatures and stresses. The creep-damage constitutive equations are given for this case. The example of numerical solution for the creep problem of cylindrical shell is presented.

Keywords:
rotational shell, temperature, stress

Breslavskiy D.V., Tatarinova O.A., Korytko Yu.N. Creep of shells of revolution in terms of joint action of periodically varying temperatures and voltages. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 23-30.

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

Keywords:
non-stationary vibration, mechanical system, integral equations, regularization method

Voropay A.V. Nonstationary vibrations of rectangular plates with elastic support. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 30-37.

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 temperature. The work purpose is to identify critical values of the temperature change of the details connected among themselves and, on the basis of these data, determination of optimal variant of connection.

Keywords:
pressure coupling, temperature, profile connections

Danilov D.V., Andreev A.G. Comparative analysis of the profile of the coupling under the action of temperature. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 38-54.

The current paper deals with the calculation of micro and macro stress and total stress in orthotropic planes with circular hole at stress concentration of hole border. Macro stress is calculated by mixed variables functions and ANSYS. By the required results, micro stress is calculated by applying boundary conditions by numerical computations by the aid of ANSYS. Finally, the total stress values on reinforcement in composite planes were calculated for square and hexagonal structures based on various values of volume occupancy.

Keywords:
elasticity, stress concentration, orthotropic plane, hole

Daryazade S., Lvov G.I. Micro – and macro-stress concentration around holes in composite plates. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 54-64.

New interpretation of theory of determinants is considered in the article.

Keywords:
matrix, determinant

Deev V.M., Mashina I.V. New interpretation of the theory of determinants. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 64-66.

The reasons of vibrations after the reconstruction of piping systems during planned preventive work are considered. A model of the pipeline on the basis of the finite element method is built and the amplitude-frequency characteristics and the cross sections with the greatest amplitude of oscillation are determined. Based on these results guidelines are given to reduce vibrations to a safe level.

Keywords:
vibration, piping systems, amplitude-frequency characteristics

Demidov P.N., Kiporenko A.S., Polischuk S.M., Trubaev A.I., Chizhikova V.M. Assessment of vibration condition of pipelines of nuclear power plants and ensure their safe operation. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 66-72.

The method of US technological instrument amplitude-frequency characteristic construction with the use of nonlinear dynamic description approximation in the contact zone is proposed. Two cases of USTI supplying – kinematics and power are considered. The analysis of AFC at the change of technological process parameters is conducted.

Keywords:
ultrasonic instruments, nonlinear processes, mathematical design, contact zone

Isakov S.N. The study of dynamic nonlinear processes ultrasonic technology tools. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 73-80.

Results of the calculation of the stress-strain state of the foundation of a 200 MW turbine under hydrostatic loading and compared with similar data for stationary are described. Identified the most dangerous places in the considered are given. Modelling and calculations were performed using the finite element method.

Keywords:
stress-strain state, hydrostatic loading, finite element method

Krasnikov S.V. Modeling of stress-strain state of the base for the hydro turbine unit. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 81-85.

In article the problem about dynamic stability of viscoelastic cores for any hereditary kernels is investigated at small viscosity by a method of integrated transformation of Laplas.

Keywords:
integral Laplace transform, dynamic stability

Kurbanov N.T., Aliev U.S. The study of dynamic stability of viscoelastic rods. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 86-90.

The results of the experimental investigations of the vibrations during the transportations of the goods which are mounted on specialized vehicle (SV) are presented in the paper. As experiments the road tests have been done. The SV has additional level of cushioning with nonlinear characteristic, which has quasi-zero stiffness. Comparative analysis has shown that quasi-zero stiffness cushioning essentially reduce the level of goods vibrations, so magnifying the movement smoothing.

Keywords:
specialized vehicle, nonlinear cushioning, quasi-zero stiffness, movement smoothing

Larin O.O., Vodka O.O., Nazarov O.O., Sokolovskiy S.A. Experimental road research ride specialized means of transport with nonlinear parisrennes. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 91-99.

The conventional continuum damage mechanics model Kachanov-Rabotnov-Hayhurst is extended to the case of variable temperature using Arrenius functions. The proposed non-isothermal creep-damage constitutive theory have been implemented in FE-code of the universal CAE ANSYS. The numeral calculation of long-term strength of three-dimensional model of vane valve body is executed.

Keywords:
damage mechanics model, non-isothermal theory of creep, numeral calculation, long-term strength

Lvov G.I., Lysenko S.V., Perin R.P. Long-term strength of the regulating valve slide gate type according to an inhomogeneous temperature distribution. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 99-107.

This paper presents autofrettage processes in case of plain strain. There are produced equation of elastic-plastic theory in correspondence with Continuum Damage Mechanics. There are described method of solving boundary problem and presented result of solving problem of autofrettage thick-walled tubes.

Keywords:
autofrettage, damage of material

Lvov G.I., Okorokov V.A. The influence of the material damage on avtomatizovani thick-walled cylinders. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 108-117.

The integrated software for modeling the dynamics of rotors is introduced. The program allows you on set parameters of the «rotor-bearing» system to create in automatic mode finite element model of the shaft, to choose the location of the added masses and supports with the assignment of their type and parameters. Such types of calculations as the analysis of natural frequencies and forms subject to the rotational velocity and gyroscopic moment, the search for critical speed of rotation, and the definition of the harmonic response to the action of the centrifugal force caused by the presence of mass imbalance are implemented. The reliability of the software tools is confirmed by experimental data and results of other computational research.

Keywords:
rotordynamics, critical speeds, software tool

Martynenko G.Yu., Myakinnikov S.S. Integrated software tool for the numerical analysis of dynamics of rotors on various supports. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 117-131.

In the report the features of construction of mathematical model of movement(traffic) of a platform of the three-coordinate electromagnetic vibrating stand (EMVS) are shown. On the basis of the developed mathematical model the block diagram EMVS is made. The ways of indemnification of are shown.

Keywords:
mathematical model, electromagnetic vibrating stand, angular fluctuations

Myagkohleb K.B. Principles of construction of system of electromagnetic exciters to play three-axis load. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 132-137.

A analytical review of the work of Academician AN UkrSSR A.P. Philipova published in central journals in Moscow, and then reissue of his books on the vibrations of deformable systems.

Keywords:
analytical review, vibrations, deformable systems

Olshanskiy V.P. About the research of A. P. Filippov in the theory of inelastic impact. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 138-147.

The form of series formula to calculate the maximum angle of twist and maximum shearing stresses in a cylindrical rod whose one end is rigidly clamped, and the second fixed perfectly rigid body subjected to torque shock were constructed. To speed up the convergence of the series are highlighted and summed analytically discontinuous components of the solution. Examples of calculations are given.

Keywords:
maximum angle of twist, maximum shearing stresses, cylindrical rod

Olshanskiy V.P., Olshanskiy S.V. About shock torsion of a cylindrical shaft. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 148-157.

We are accomplished the analysis of processing technology, structure and statistics of mechanical characteristics of rotor conductors for turbogenerators. These data permit let the reliability estimation by means of cumulative failure model.

Keywords:
rotor conductors, mechanical characteristics, reliability, statistics, turbogenerator

Osternik E.S. About the parameters for evaluating the reliability of copper wire of turbo liquid cooled. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 158-162.

The effect of structural changes in the surface layer of a metal plate on its deformation arising under shock loading is considered in the paper.

Keywords:
surface layer, deformation, shock loading

Sotrihin S.Yu., Yareschenko V.G. The influence of the structural state of the metal on its deformation characteristics. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 163-166.

The research carried out finite element calculation of stress-strain state of a compound matrix when a work-piece material is plastically deformed. Numerical modeling and mechanical analysis performed with CAD-FEM software ANSYS. The features of the deformation of the working insert within shrouded composite matrix are presented.

Keywords:
mechanical analysis, plastic deformation, finite element contact stresses, matrix bandage, mechanical insert

Stepuk A.V., Bondar S.V., Avtonomova L.V., Pogorelov S.Yu. Deformation characteristics of composite matrix. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 167-170.

The theoretical and experimental studies of wave propagation in the sapphire rods with different orientation of the crystallographic axes are performed. The theoretical values of the velocities of wave propagation of deformations are obtained. The good agreement of the theoretical results with the experimental data is established.

Keywords:
elasticity theory, wave propagation, impact loading, anisotropy, sapphire

Shupikov A.N., Litvinov L.A., Ugrimov S.V., Sotrihin S.Yu., Yareschenko V.G., Andreev E.P. The study of wave processes in the sapphire rods under shock loading. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 171-179.

Bending problems of high-temperature rotors of steam turbines as a result of circumferential nonuniformity of creep are considered. Results of calculations of nonaxisymmetric straining of intermediate-pressure rotor of turbine K-300-240 with use of experimental data about the circumferential nonuniformity of mechanical properties of a material, and of rotor of turbine T-250/300 are presented for the preset magnitude of nonuniformity of material properties. Results are compared with experimental data of bending of various turbine rotors.

Keywords:
high-temperature rotors, creep, nonaxisymmetric straining

Shulzhenko N.G., Gontarovskiy P.P., Protasova T.V. Non-axisymmetric deformation of high temperature steam turbine rotor with a circumferential anisotropy of the creep properties of the material. NTU «KhPI» Bulletin: Series «Dynamics and Strength of Machines». 2012. No. 55. Pp. 179-186.