Applied model of the deformation of nonlinearly viscoelastic vibration insulators subject to cyclic deformation

S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Institute of Geotechnical Mechanics, National Academy of Sciences of Ukraine, Dnepropetrovsk. Translated from Prikladnaya Mekhanika, Vol. 30, No. 9, pp. 63–68, September, 1994.     

One-dimensional flow of a two-phase medium

Institute of Geotechnical Mechanics, Ukrainian Academy of Sciences, Dnepropetrovsk. Translated from Prikladnaya Mekhanika, Vol. 25, No. 8, pp. 111–118, August, 1989.     

On the level of coverage and citation of publications by mechanicians of the national academy of sciences of Ukraine in the Scopus database

The paper analyzes the level of coverage and citation of publications by mechanicians of the National Academy of Sciences of Ukraine (NASU) in the Scopus database. Two groups of mechanicians are considered. One group includes 66 doctors of sciences of the S. P. Timoshenko Institute of Mechanics as representatives of the oldest institute of the NASU. The other group includes 34 members (academicians and corresponding members) of the Division of Mechanics of the NASU as representatives of the authoritative community of mechanicians in Ukraine. The results are presented for each scientist in the form of two indices—the total number of publications accessible in the database as the level of coverage of the scientist’s publications in this database and the h-index as the citation level of these publications. This paper may be considered to continue the papers [6–12] published in Prikladnaya Mekhanika (International Applied Mechanics) in 2005–2009     

Development of analytical methods in three-dimensional problems of the statics of anisotropic bodies (Review)

The main results of scientific research carried out at the S. P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine in the field of three-dimensional problems of the statics of anisotropic bodies are stated in a systematic form. The results include the structural method of constructing the exact analytical solutions of equations of the elastic and thermoelastic equilibrium of rectilinearly orthotropic bodies and approximate analytical methods of solving three-dimensional boundary-value problems for curvilinearly orthotropic bodies of canonical and noncanonical form. Results of solution of specific boundary-value problems for orthotropic and transversally isotropic bodies are analyzed. S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Translated from Prikladnaya Mekhanika, Vol. 36, No. 2, pp. 3–38, February, 2000.     

Vibrations of shallow noncircular membranes with initial stresses

The basic relations for a geometrically nonlinear (quadratic approximation) theory of thin elastic membranes are obtained. The relations are used to develop a variational method for studying free vibrations of initially flat membranes bounded by a stationary piecewise-smooth contour. The membrane is deformed by uniform pressure. Numerical results are given for different types of vibrations of rectangular and elliptical shells. N. V. Gogol' Pedagogical Institute, Nezhin: S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Translated from Prikladnaya Mekhanika, Vol. 35, No. 8, pp. 78–86, August 1999.     

Ultrasonic nondestructive methods of stress analysis in materials and structural members (review)

Results of the justification, development, and application of nondestructive ultrasonic methods of stress analysis are briefly outlined (summarized). These are the results of cooperative research by the S. P. Timoshenko Institute of Mechanics and the E. O. Paton Institute of Electric Welding. The nondestructive ultrasonic methods are intended to determine triaxial (including biaxial and uniaxial) stresses in structural members and biaxial (including uniaxial) stresses in near-surface layers of materials     

Three-dimensional problems of mechanics of deformable bodies of noncanonical shape

The paper is based on the author's report at the General Jubilee Meeting of the Mechanics Division on the occasion of the 80th anniversary of the National Academy of Sciences of Ukraine. Results obtained in the subject area “mechanics of deformable bodies of noncanonical shape” are discussed. This subject area was formed at the S. P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine on the basis of variants of the analytical method of boundary-shape perturbation proposed and developed at the Institute. The objects of investigation and the classification of three-dimensional boundary-value problems for noncanonical areas are analyzed. Tests of the accuracy of approximate solutions obtained using the developed analytical methods are indicated. Presented at General Meeting of Mechanics Division of National Academy of Sciences of Ukraine (Kiev, November 30, 1998). S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Translated from Prikladnaya Mekhanika, Vol. 35, No. 10, pp. 3–20, October, 1999.     

The S. P. Timoshenko Institute of Mechanics at the beginning of the third millennium

A brief historical review of the main scientific activities at the S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, is outlined. Current trends are examined, in the Institute as a whole and in particular departments. As a resource, reviews of the Institute's activity published between 1955 and 1999 in this journal and elsewhere are listed in a bibliography. S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Translated from Prikladnaya Mekhanika, Vol. 36, No. 1, pp. 6–24, January, 2000.     

Efficiency of the invariant gradient criterion of stability for the flight conditions of the flow around axisymmetric bodies in the early stage of transition and relaminarization

Quantitative results of the study of the invariant gradient criterion of stability, which was theoretically obtained by N. N. Yanenko and S. A. Gaponov, for the flight conditions of the flow around the forebodies of aerophysical complexes in the laminar flow regions and in the early stage of the laminar-turbulent transition and relaminarization are presented. Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090. Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 40, No. 1, pp. 89–100, January–February, 1999.     

Experimental investigation of the dynamics of shells of revolution (review)

The results of experimental investigations carried out at the S. P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine are analyzed in this review. The analysis suggests that experimental investigations of shell dynamics must be contained and developed if the method used to calculate the stressed-strained state and stability of dynamically loaded shells is to be developed further and made more precise. S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev, Ukraine. Translated from Prikladnaya Mekhanika, 35, No. 7, pp. 3–11, March, 1999.     

Extension of the microstructural theory of two-phase mixtures to composite materials

Studies in the microstructural theory of two-phase elastic, viscoelastic, and piezoelastic mixtures are analyzed with reference to composite materials. It is confirmed that an integral part of the studies in this subject area has been carried out at the S.P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine. S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Translated from Prikladnaya Mekhanika, Vol. 36, No. 5, pp. 33–64, May, 2000.     

Study of thermoviscoelastoplastic processes in the deformation of structural elements

This article surveys a number of studies made at the S.P. Timoshenko Institute of Mechanics on the effect of the history of thermoviscoelastoplastic loading of certain structural elements on their elastoplastic stress-strain state. Paper presented at the General Meeting of the Mechanics Division of the National Academy of Sciences of Ukraine (Kiev, November 30, 1998). S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev. Translated from Prikladnaya Mekhanika, Vol. 35, No. 9, pp. 3–12, September, 1999.     

Book reviews

Book reviewed in this article:
By J.S. Rao and D.V. Dukkipati, John Wiley and Sons
Reviewed by H. Rajiyah, The Center for the Advancement of Computational Mechanics, The Georgia Institute of Technology, Atlanta, GA 30332-0356.
By P.L.B. Oxley, Ellis Horwood Limited, West Sussex, England
Reviewed by H. Rajiyah, The Center for the Advancement of Computational Mechanics
By Herbert Reismann, published by John Wiley and Sons
Reviewed by J.S. Epstein, The Center for the Advancement of Computational Mechanics
Edited by T.A. Cruse, ASTM STP 969, published by the American Society for Testing and Materials
Reviewed by J.S. Epstein, The Center for the Advancement of Computational Mechanics, The Georgia Institute of Technology, Atlanta, GA 30332-0355.
By S.P. Shah and S.E. Swartz, Springer Verlag
Reviewed by J.S. Epstein, The Center for the Advancement of Computational Mechanics, The Georgia Institute of Technology, Atlanta, GA 30332-0355.
Published by The American Society for Testing and Materials, Philadelphia
Reviewed by M.A. Abdallah, Hercules Aerospace     

Stability of vertical oscillations in an electrodynamic suspension system with a discrete guideway structure

Conclusions 1. The coupling of the vehicle oscillation equation and the equations for the currents in the guideway structures must be taken into account in the stability analysis of vertical oscillations in an electrodynamic suspension system with a discrete guideway structure.2. The reported calculations indicate that vertical oscillations are unstable over a wide range of travel velocities. Consequently, the execution of steady-state vehicle motion requires vertical stabilization of the system.3. Effective stabilization can be achieved by means of a dynamic vibration damper. Even for a small relative mass =0.025 of the optimally tuned damper the perturbed motion decays rapidly.Physicotechnical Problems Branch of the Institute of Geotechnical Mechanics, National Academy of Sciences of Ukraine, Dnepropetrovsk. Translated from Prikladnaya Mekhanika, Vol. 31, No. 7, pp. 88–93, July, 1995.     

Interaction of a laminar boundary layer with external turbulence

Transition in the boundary layer on a flat plate in a turbulent flow is investigated experimentally and theoretically. It is established that over a broad range of flow conditions (variation of the intensity and scale of the external turbulence, the angle of attack, the shape of the leading edge, etc.) transition takes place without the formation of Tollmien-Schlichting waves, and its initial stages, including the amplification of disturbances, are described by the linearized unsteady three-dimensional boundary layer equations without a pressure gradient.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 55–65, September–October, 1989.The authors are grateful to N. F. Polyakov, V. S. Kosorygin, and O. S. Ryzhov for useful discussions and to N. N. Bychkov and O. N. Konstantinovskii for assisting with the experiments.     

On the activity of the S. P. Timoshenko institute of mechanics in 1991–2011

This paper, dedicated to the 20th anniversary of the independence of Ukraine (1991–2011), analyzes the activity of the S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, in 1991–2011. The major scientific achievements and their evaluation by the world’s scientific community are briefly reported. The scientific staff and training activity of the Institute are discussed. New books (m?n?graphs, textbooks) and publications in scientific journals are mentioned. It is shown that the scientists of the Institute participate in the establishment of the scientific information environment     

The Dynamics of Systems of Rigid and Elastic Bodies as Applied to Spacecraft

The basic results of the scientific research conducted at the S. P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine (NASU) in a creative cooperation with the M. K. Yangel' SDO "Yuzhnoe" and the Institute of Technical Mechanics of NASU and the National Space Agency of Ukraine (NSAU) are generalized and systematized. The research addressed mathematical models and the dynamics of objects of space-rocket engineering such as controlled systems of rigid and elastic bodies, systems of rigid bodies of variable configuration, and systems of bodies with unilateral connections. The following information is detailed here: methods for creating spatial program motions of elastic space structures about the center of mass, methods and algorithms for mathematical simulation of the dynamics of reconfigurable spacecraft, unconventional concepts of simulating the state of weightlessness of a reconfiguring spacecraft under earth conditions on a special stand using suspension cables, different aspects of the dynamics of space cable systems, and other problems resolved within the framework of the subjects indicated     

On the evolution of the scientific information environment

Problems arising in the development of the scientific information environment are considered. Emphasis is on the building of international databases for periodical publications and monographs, evaluation of publications and journals, and objective citation. The activity of the S. P. Timoshenko Institute of Mechanics and the journal Prikladnaya Mekhanika (International Applied Mechanics) in this field is exemplified. Suggestions on how to ensure objective citation in articles are discussed To the Beginning of the Third Millenium Prepared in the context of events planned for the World Science Day for Peace and Development, celebrated each November 10, in compliance with a resolution of the 31th Session of UNESCO General Conference. __________ Translated from Prikladnaya Mekhanika, Vol. 42, No. 11, pp. 3–29, November 2006.     

On vibrations induced in a cylinder in the wake of another due to vortex shedding

Summary Purpose of this work is to describe the results obtained in a wind-tunnel on a model consisting of two cylinders, one in the wake of the other, with both fixed or with the downstream cylinder allowed to vibrate.The fundamental characteristics of the fluid in the wake and the forces acting on the downstream cylinder are also reported. The value of energy introduced by the fluid on a vibrating cylinder in the wake is also determined.

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Sommario Vengono riportati i risultati sperimentali ottenuti in galleria del vento su un modello costituito da due cilindri, di cui uno è posto in scia dell'altro, nei casi in cui siano entrambi fissi o che il cilindro in scia possa vibrare.Sono pure riportate le caratteristiche fondamentali del fluido nella scia e le forze che agiscono sul cilindro a valle. Nel caso in cui il cilindro in scia possa vibrare viene pure riportato il valore dell'energia introdotta dal fluido.

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This work is the outcome of a collaboration between ENEL, Salvi S.p.A. and the Institute of Applied Mechanics, Polytechnic of Milan. The Institute of Applied Mechanics received a CNR subsidy to take part in this research.     

The Theory and Methods of the Stress–Strain Analysis of Ribbed Shells

Studies are reviewed where basic tenets of the theory and methods of the stress–strain analysis of discretely rib-reinforced shells are formulated. The major results of the investigations carried out by the department of thin-walled structure mechanics headed by I. Ya. Amiro at the S. P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine are presented