... Abstract Typical vibration test data, especially from transient vibration tests, contains several observations with reference to test data measurement quality and physics of response. In this paper, few common observations are highlighted. These observations are obtained from both shock type...

... maintenance activity. In a typical application, these two modules are assembled using a tie-bolt, an adaptor and a curvic coupling. The tie-bolt stretch along with all the internal rotor geometric interfaces is known to greatly influence rotor generated vibration. The tie-bolt is loaded or stretched...

... Abstract A safe operation of compressors requires a profound understanding of the vibrational behaviour of their components. The focus of this work is on the identification of the modal quantities of an impeller of a radial compressor. The prediction of the mistuned mode shapes...

.... vibration system identification wavelet transform bladed disk Proceedings of ASME Turbo Expo 2024 Turbomachinery Technical Conference and Exposition GT2024 June 24-28, 2024, London, United Kingdom GT2024-128878 MODAL IDENTIFICATION OF ROTATING BLADES BY TIP TIMING AND STRAIN GAUGE MEASUREMENTS...

.... The effects of main shaft dimensions on the average eigenvalue sensitivity are examined to select and tune certain dimensions for the rotordynamic stability. This numerical method has been implemented to improve the rotordynamic stability of two compressor pinions. rotor dynamics vibration compressor...

... Abstract Wake from upstream blades is a significant vibration excitation source in axial compressors. One needs to know how wake passing induces the unsteady pressure to design a more efficient and reliable compressor. This paper studies the pressure fluctuation caused by the wake...

... Abstract The maintenance of wind turbines is essential to reduce wind energy levelized costs. Earlier detection of potential faults in the rotating subcomponents, such as the drivetrain, helps to plan maintenance actions. Several vibration processing methods, e.g., short-time Fourier analysis...

... Abstract Research nowadays takes advantage of the cyclostationary properties in the vibration waveforms of rotating machines for fault detection. For example, cyclic spectral coherence maps (CSCM) break down vibration signals into cyclic and carrier frequencies. However, the large size...

... vibrations. A previously-developed reduced-order model (ROM) leveraging piston theory to compute the stability of general fluid-structural configurations is first presented and summarized. The ROM has been applied to the high-pressure turbine of a dual-stage turbocharger and the results are reviewed...

... Abstract One of the main challenges when designing aero engines is their high sensitivity to vibration, which can lead to a loss of performance, increased maintenance requirements and in the worst case a catastrophic failure of the engine. The Holistic Engine Rotor MEasurement System (HERMES...

... Abstract This work concerns the numerical modeling of geometric nonlinear vibrations of slender structures in rotation using an original reduced order model based on the use of dual modes along with the implicit condensation method. This approach is an improvement of the classical ICE method...

... Abstract This paper proposes a vibration-based diagnostic methodology for aircraft bearings based on a joint first- and second-order cyclostationary analysis. The idea is to track the first- and second-order content over a predefined operating speed range, instead of ignoring the later...

..., thus significantly increasing surge onset risk. The activity The main goal is to obtain a suitable quantitative indicator capable to detect in advance surge inception by relying only on vibrational and acoustic system response. Several transient operations starting from a compressor stable condition...

... Abstract In some circumstances it is impossible to exploit resonance crossings to identify the modal properties of rotor disks. In these cases, the identification process must rely on nonsynchronous vibrations and becomes challenging for two reasons. First, the signals are weak (compared...

... operation range, and investigating rotordynamic issues. rotordynamics vibration stability turbine compressor rotor-bearing system Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-60301 EFFECTIVE EVALUATION...

... is discussed. aeroelasticity fluid-structure interaction flutter turbocharger turbomachinery vibration Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-58759 REDUCED-ORDER MODELING OF EXTREME SPEED TURBOCHARGERS...

... of radial vibrations of centrifugal compressors. Experience proves this is one of the most critical data for early fault detection. The goal was to develop a smart modelling based on historical data using essential parameters influencing rotor-dynamics. As a result, a clear correlation was found between...

... Abstract The fatigue life behavior and internal surface conditions of inherently damped Additive Manufactured (AM) specimens subjected to vibration bending are under investigation. This study supports research that demonstrated 95% vibration suppression due to damping capability of AM...

... Abstract To investigate the effect of altitude on vibrations in a turbocharger, an aircraft compression-ignition engine was operated in both a sea level cell and an altitude chamber up to 25,000 ft (7620 m). The turbocharger was instrumented with a nonintrusive stress measurement system...

... of rotor. Once aeroengine starts after a little time of cooling, thermal bow forms more easily, causing excessive vibration. In some cases, the thermal bow can be so severe that the engine will be unable to start. Based on the rotor for one certain type of aeroengine, the paper describes an experiment...