National Repository of Grey Literature 80 records found  beginprevious56 - 65nextend  jump to record: Search took 0.00 seconds. 
Vibration cylindrical shells containing flowing fluid
Zolotarev, Igor
The natural frequencies of the free vibration of a circular cylindrical shell containing flowing inviscid fluid are studied. The numerical results obtained by use ANSYS numerical package are analyzed for frequency-modal properties of two different numerical models and compared with results of the analytical calculations. Application different FEM models that are created with using fluid-structure-interaction elements (FSI) and without it are analyzed too.
Natural vibrations and stability of cylindrical shells in interaction with flowing fluid
Horáček, Jaromír ; Zolotarev, Igor
Natural frequencies and thresholds of stability of thin cylindricaal shell conveying or surrounded by flowing fluid are theoretically studied. Viscous fluid forces are modelled by the Darcy law, and effects of fluid compressibility are discussed. Particularly the effects of fluid viscosity and the type of boundary conditions at the edges of the shell on the critical flow velocities are demonstrated.
Identification methods in resonance ultrasound spectroscopy
Landa, Michal ; Kozánek, Jan ; Zolotarev, Igor ; Plešek, Jiří
Among the fundamental characteristics of solids are their elastic constants. During the determination of above constants are identified by fitting methods the natural frequencies and compared with FEM results.
Interaction and feedbacks ´2001 /8./
Zolotarev, Igor
The proceedings including 39 texts from conference Interaction of dynamic systems with surroundings and systems with feedbacks.
Vibration cylindrical shells containing flowing fluid
Zolotarev, Igor
The natural frequencies of free vibration of a circular cylindrical shell containing flowing inviscid fluid are studied. The numerical results obtained by use simple 1-D shell theory are compared with results obtained by use 3-D shell theory and by us NSYS numerical package. Critical flow velocity is analyzed for several shape mode of studied cylindrical shell.
Vibration of a joint spherical shell - plate structure in interaction with an compressible filling
Zolotarev, Igor ; Velecká, S. ; Ihlárová, I. ; Wiszt, E.
The segment of spherical shell covered by an elastic plate and filled by a compliant substance represents a simplified mathematical model of a human skull including a model of brain tissue. The study of frequency-modal properties of this system was re
Vibration of cylidrical shell in interaction with flowing fluid /Z 1300/00/
Zolotarev, Igor ; Pelletier, D.
This report was prepared during a four months training period in the Institute of Thermomechanics of the Czech Academy of Sciences in the Department of Dynamics and Vibrations. The aim of this work is to create a program within the MATLAB software, which computes the natural frequencies of the vibration of a thin circular cylindrical shell in interaction with a flowing fluid.
On the solution of a natural vibration of cylindrical shells in interaction with flowing fluid
Zolotarev, Igor ; Pelletier, D.
The present paper is a contribution to the solution of a natural vibration of circular cylindrical shells in interaction with flowing inviscid fluid. The mathematical model of the studied system contains general boundary conditions of the shell for ends clamped elastically and allows to use the method of solution are based on the [1,2,4,5]. A new more accurately algorithm for calculation of the action of flowing fluid on the vibrating surface of the shell and frequency-modal properties of the studied system there are presented. Obtained results correspond to the earlier calculations of the natural frequencies and its variations on the flow velocities [4,5].

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