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Flutter of structures in a gas flow Team consisting of V. Vedeneev, M. Kolotnikov, F. Abdukhakimov, and V. Bondarev studies new linear and nonlinear problems of thin-wall elastic structures interacting with gas flows.
Skin panel subject to panel flutter. Thin elastic skin panels are mounted on a rigid frame consisting of stringers and spars.
The first direction of research is devoted to panel flutter, namely, self-exciting oscillations of elastic shells in supersonic gas flow. Two types of panel flutter are possible: single-mode and coupled-mode flutter. Coupled-mode flutter is studied in detail both theoretically and experimentally, whereas the detailed analysis of the single-mode flutter was started in the 2000s by V. Vedeneev. In 2010, the existence of the single-mode flutter was experimentally confirmed. Current research is directed to deeper theoretical and experimental studies of single-mode flutter of flat and cylindrical shells. 
Left: sketch of the experiment on elastic plate flutter in supersonic wind tunnel; right: picture of the model installed into the wind tunnel.
Left: Experimental plot of plate vibration amplitude versus Mach number. Right: Vibration process in the stability (M=1.147) and flutter (M=1.298) regions.
The second research direction is blade flutter in jet engines and gas turbines. At the present day, for analysis of blade flutter in Russian jet engine industry, probabilistic approach is used. It is justified for compressor blades with midspan shroud, for which a huge test statistics is accumulated. 
Natural mode shape of a blade wheel of a jet engine.
However, for wide-chord blades without shroud, which are not covered by the existing test statistics, results of predictions based on probabilistic approach are not well-grounded. In collaboration with Gas-Turbine Engineering RPC “Salut”, we have developed a software for numerical 3-D analysis of blade flutter based on energy method. Results of calculations are compared to experimental data, which showed excellent correlation. |
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| Last update: august of 2024 | |||||||||||||||||||||||||||||||||||||||
