... on Vibration and Sound of ASME for publication in the J ournal of V ibration and A coustics . 13 08 2024 16 11 2024 18 11 2024 12 12 2024 mechanical signatures rotating machinery modal analysis rotor dynamics stability system identification experiment Rotating...

...Shogo Kimura; Tsuyoshi Inoue; Hiroo Taura; Akira Heya The rotordynamic (RD) fluid force generated in seals affects the stability of turbomachinery. RD coefficients have been determined using bulk-flow or computational fluid dynamics analyses, and the effect of seals on the stability has been...

... through numerical simulations have good correlation, same conclusions were drawn from experimental results in previous section. So long, these stability conditions (22) are satisfied through mixing friction modifiers with base oil or surface treatment of separator plates using suggested compounds...

...: matveev@wsu.edu damping stability cryogenics thermoacoustics liquid hydrogen storage References [1] Taconis , K. W. , Beenakker , J. J. M. , Nier , A. O. C. , and Aldrich , L. T. , 1949 , “ Measurements Concerning the Vapor-Liquid Equilibrium of Solutions...

...Supreeth S. Sultanpur; Satyanarayanan R. Chakravarthy Presently, passive methods of controlling combustion instability fall short when one considers stabilizing multiple acoustic modes. In this paper, we present a passive control approach based on the locations of the burners to stabilize multiple...

... of the plucking phenomenon has relied on numerical integration methods. In this work, a semi-analytical method is developed to investigate the stability and bifurcation behaviors of rotary magnetic plucking, which integrates a second-order perturbation technique and discrete Fourier transform. Analysis through...

... with the time simulation results. The stability is checked with Floquet theory and bifurcation diagrams from Poincare sections. The model is fully capable of generating the tooth geometries, mesh stiffnesses, and gear train dynamics without reliance on any package programs. Hence, the model provides flexibility...

..., and stability of the system. The results reveal that the vibration and instability of the spinning shaft are strongly dependent on the unbalanced load and material gradient. The expansion of Eq. (30) leads to (31) cos ( δ 1 ) cosh ( δ 2 ) + [ 4 β 2 ( δ 1 2 − δ 2...

... aerodynamic forces. We also address discrepancies in LCO amplitude trends due to the nonlinear inertial forces previously reported in the literature. References [1] Dowell , E. H. , 1970 , “ Panel Flutter—A Review of the Aeroelastic Stability of Plates and Shells ,” AIAA J. , 8 ( 3 ), pp. 385...

..., the nonlinear rotor dynamics of vertical rotating machines with journal sliding bearings are investigated and evaluated by theoretical and numerical analyses and experiments of a simple vertical rotating shaft. As a result, some new destabilization and stabilization phenomena are found in the vertical shaft...

...Susheelkumar C. Subramanian; Sangram Redkar In this work, the asymptotic stability bounds are identified for a class of linear quasi-periodic dynamical systems with stochastic parametric excitations and nonlinear perturbations. The application of a Lyapunov–Perron (L-P) transformation converts...

...Arion Pons This technical note is concerned with aeroelastic flutter problems: the analysis of aeroelastic systems undergoing airspeed-dependent dynamic instability. Existing continuation methods for parametric stability analysis are based on marching along an airspeed parameter until the flutter...

...Enora Denimal; Jean-Jacques Sinou; Samuel Nacivet This study focuses on the prediction of the stability behavior of an industrial automotive brake system under structural and environmental uncertainties. Uncertainties are modeled with a random distribution or an interval and are propagated...

... 10 2020 06 04 2021 07 04 2021 04 05 2021 time-varying optimal control active vibration control moving mass state estimation active vibration and noise control mechatronics and electro-mechanical systems smart materials and structures stability structural dynamics...

... ]. It is also important to discuss the stability of the system's PDE obtained in Eq. (30) . Since the PDE for the zigzag pattern is similar to a special orthotropic laminate, the following conditions on the coefficients of the PDE ascertain the stability in the system [ 20 ]: (33) H 2 > 0 , H...

... the eigenvalue loci), and the system is stabilized. A section of the stability plot from Fig. 11( b ) is represented in Fig. 12 . For r I = 0.3, the stability range widens as ξ D is increased from 0.2 to 1. This region is shifted to lower frequency ratio values for 1.0 < ξ D...

... of V ibration and A coustics . 22 12 2020 08 03 2021 08 03 2021 02 04 2021 dynamics mechatronics and electro-mechanical systems nonlinear vibration stability vibration control For time-periodic systems, analytical techniques such as perturbation [ 4...

... is regarded as a breakthrough for future mobility. However, its practical implementation requires the solution of key shortcomings. Among these, the stability of the electrodynamic levitation system remains partially unexplored. The state of the art presents numerous attempts to attain stable behavior...

...Yudai Kunori; Tsuyoshi Inoue; Kenjiro Miyake In turbomachinery, the rotor dynamic (RD) fluid force generated in a fluid element, by the interaction between the shaft behavior and the fluid flow, is one of the causes of the shaft behavior and has a great influence on the stability...

... Engineering Division of ASME for publication in the J ournal of V ibration and A coustics . 21 05 2020 22 11 2020 23 11 2020 13 01 2021 cable-harnessed structures plate theory vibrations frequency response function modal testing dynamics modal analysis stability...