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J. Jungblut, Ch. Fischer, and S. Rinderknecht, “Active vibration control of a gyroscopic rotor using experimental modal analysis,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e138090, 2021, doi: 10.24425/bpasts.2021.138090.
T. Drapatow, O. Alber, and E. Woschke, “Consideration of fluid inertia and cavitation for transient simulations of squeeze film damped rotor systems,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e139201, 2021, doi: 10.24425/bpasts.2021.139201.
B. Schüßler, T. Hopf, and S. Rinderknecht, “Simulative investigation of rubber damper elements for planetary touch-down bearings,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e139615, 2021, doi: 10.24425/bpasts.2021.139615.
G. Quinz, M. Prem, M. Klanner, and K. Ellermann, “Balancing of a linear elastic rotor-bearing system with arbitrarily distributed un- balance using the Numerical Assembly Technique,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e138237, 2021, doi: 10.24425/ bpasts.2021.138237.
M. Klanner, M. Prem, and K. Ellermann, “Quasi-analytical solutions for the whirling motion of multi-stepped rotors with arbitrarily distributed mass unbalance running in anisotropic linear bearings,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e138999, 2021, doi: 10.24425/bpasts.2021.138999.
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T. Szolc and R. Konowrocki, “Research on stability and sensitivity of the rotating machines with overhung rotors to lateral vibrations,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e137987, 2021, doi: 10.24425/bpasts.2021.137987.
Ch. Prasad, P. Snabl, and L. Pešek, “A meshless method for subsonic stall flutter analysis of turbomachinery 3D blade cascade,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 6, p. e139000, 2021, doi: 10.24425/bpasts.2021.139000.
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D. Czarnecka-Komorowska, K. Bryll, E. Kostecka, K. Gawdzińska, E. Piesowicz, and M. Tomasik, ”The composting of PLA/HNT biodegradable composites as an ecoapproach to the sustainability”, Bull. Pol. Acad. Sci. Tech. Sci. 69(2), e136720 (2021), doi: 10.24425/ bpasts.2021.136720.
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