Search Results - "CHASALEVRIS, Athanasios"

Analytical Estimation of Maximum Amplitude During Passage Through Resonance of a Flexible Rotor.

Authors: Fasih, Muhammad Saad Ramírez-Barrios, Miguel Chasalevris, Athanasios et al.

Source: Journal of Vibration Engineering & Technologies; Jan2026, Vol. 14 Issue 1, p1-10, 10p

Evaluation of Quasi-Periodic Oscillations for the Dynamic Design of Dual Spool Jet Engines Utilizing a Solution of the Invariant Manifold.

Authors: Dimou, Emmanouil Kavvadas, Konstantinos Stylianopoulou, Ino et al.

Source: Journal of Engineering for Gas Turbines & Power; Dec2025, Vol. 147 Issue 12, p1-13, 13p

Robust Rotor Dynamic Design Evaluation of Turbine-Generators Integrating Sensitivity, Uncertainty, and Optimization.

Authors: Chasalevris, Athanasios Gavalas, Ioannis Sawicki, Jerzy T.

Source: Journal of Engineering for Gas Turbines & Power. Oct2025, Vol. 147 Issue 10, p1-15. 15p.

Control of Seismic Excitation in Power Generation Turbomachines Utilizing Active Oil Film Bearings.

Authors: Gavalas, Ioannis Chasalevris, Athanasios Sawicki, Jerzy T.

Source: Journal of Engineering for Gas Turbines & Power. Oct2025, Vol. 147 Issue 10, p1-13. 13p.

Coupling nonlinear dynamics and multi-objective optimization for periodic response and reduced power loss in turbochargers with floating ring bearings.

Authors: Polyzos, Ioannis Dimou, Emmanouil Chasalevris, Athanasios

Source: Nonlinear Dynamics; Dec2024, Vol. 112 Issue 23, p20703-20724, 22p

Adaptive turbine-generator dynamics and alignment utilizing active journal bearings: An analytical investigation on system modelling and control.

Authors: Gavalas, Ioannis Tsoutsanis, Odysseas Chasalevris, Athanasios et al.

Source: Tribology International; Mar2026:Part A, Vol. 215, pN.PAG-N.PAG, 1p

Nonlinear Dynamics of Turbine Generator Shaft Trains: Evaluation of Bifurcation Sets Applying Numerical Continuation.

Authors: Gavalas, Ioannis Chasalevris, Athanasios

Source: Journal of Engineering for Gas Turbines & Power. Jan2023, Vol. 145 Issue 1, p1-13. 13p.

An Investigation on the Dynamics of High-Speed Systems Using Nonlinear Analytical Floating Ring Bearing Models.

Authors: Chasalevris, Athanasios¹

Source: International Journal of Rotating Machinery. 9/29/2016, p1-22. 22p.

Optimizing energy dissipation in gas foil bearings to eliminate bifurcations of limit cycles in unbalanced rotor systems.

Authors: Papafragkos, Panagiotis Gavalas, Ioannis Raptopoulos, Ioannis et al.

Source: Nonlinear Dynamics; Jan2023, Vol. 111 Issue 1, p67-95, 29p

Optimal bearing configuration selection for power generation shaft-trains: A linear and nonlinear dynamics approach.

Authors: Chasalevris, Athanasios Gavalas, Ioannis Sawicki, Jerzy T.

Source: Journal of Sound & Vibration. Mar2025, Vol. 599, pN.PAG-N.PAG. 1p.

Subjects: Multi-objective optimization, Rotor dynamics, Laminar flow, Nonlinear analysis, Nonlinear functions

Controlling bifurcations in high-speed rotors utilizing active gas foil bearings.

Authors: PAPADOPOULOS, Anastasios GAVALAS, Ioannis CHASALEVRIS, Athanasios

Source: Bulletin of the Polish Academy of Sciences: Technical Sciences. 2023, Vol. 71 Issue 6, p1-8. 8p.

Improving stability and operation of turbine rotors using adjustable journal bearings.

Authors: Chasalevris, Athanasios Dohnal, Fadi

Source: Tribology International. Dec2016, Vol. 104, p369-382. 14p.

Subjects: Turbine blades, Rotors, Journal bearings, Stability (Mechanics), Stiffness (Mechanics), Damping (Mechanics)

A Design Method to Eliminate Sub Synchronous Response in Automotive Turbochargers utilizing Nonlinear Dynamics of Time Periodic Systems.

Authors: Chatzistavris, Alexios Chasalevris, Athanasios

Source: Journal of Sound & Vibration. Mar2024, Vol. 573, pN.PAG-N.PAG. 1p.

Subjects: Turbochargers, Rotor dynamics, Limit cycles, Floquet theory, Arc length, Dynamical systems

Finite length floating ring bearings: Operational characteristics using analytical methods.

Authors: Chasalevris, Athanasios¹ chasalevris@sdy.tu-darmstadt.de

Source: Tribology International. Feb2016, Vol. 94, p571-590. 20p.

Subjects: Bearings (Machinery), High pressure (Technology), Parameter estimation, Analytical solutions, Floating (Fluid mechanics)

Analytical Evaluation of the Static and Dynamic Characteristics of Three-Lobe Journal Bearings With Finite Length.

Authors: Chasalevris, Athanasios¹ chasalevris@sdy.tu-darmstadt.de

Source: Journal of Tribology. Oct2015, Vol. 137 Issue 4, p1-16. 16p.

Subjects: Journal bearings, Reynolds equations, Data analysis, Damping (Mechanics), Equilibrium, Approximation theory, Stiffness (Mechanics)

On the quality of stability and bifurcation sets in rotors with permanent shaft bow on nonlinear supports.

Authors: Gavalas, Ioannis Chasalevris, Athanasios Mehralian, Fahimeh et al.

Source: International Journal of Non-Linear Mechanics. Jan2024, Vol. 158, pN.PAG-N.PAG. 1p.

Subjects: Rotor dynamics, Rotational motion, Rotors, Bearings (Machinery), Rotor bearings, Rotating machinery, Finite element method, Limit cycles, Bifurcation diagrams

A journal bearing with variable geometry for the suppression of vibrations in rotating shafts: Simulation, design, construction and experiment.

Authors: Chasalevris, Athanasios Dohnal, Fadi

Source: Mechanical Systems & Signal Processing. Feb2015, Vol. 52/53, p506-528. 23p.

Subjects: Journal bearings, Structural engineering, Vibration (Mechanics), Shafting machinery, Rotating machinery, Damping (Mechanics)

A novel semi-analytical method for the dynamics of nonlinear rotor-bearing systems.

Authors: Chasalevris, Athanasios Papadopoulos, Chris

Source: Mechanism & Machine Theory. Feb2014, Vol. 72, p39-59. 21p.

Subjects: Nonlinear analysis, Rotor dynamics, Simulation methods & models, Boundary value problems, Fluid dynamics

Experimental detection of additional harmonics due to wear in journal bearings using excitation from a magnetic bearing.

Authors: Chasalevris, Athanasios Dohnal, Fadi Chatzisavvas, Ioannis

Source: Tribology International. Mar2014, Vol. 71, p158-167. 10p.

Subjects: Magnetic bearings, Mechanical wear, Rotors, Time-frequency analysis, Critical speeds (Engineering)

Identification of multiple cracks in beams under bending

Authors: Chasalevris, Athanasios C. Papadopoulos, Chris A.

Source: Mechanical Systems & Signal Processing. Oct2006, Vol. 20 Issue 7, p1631-1673. 43p.

Subjects: Beam dynamics, Bending (Metalwork), Frequencies of oscillating systems, Curves