On-line real-time mistuning identification and model calibration method for rotating blisks based on blade tip timing (BTT)

D Hu, W Wang, X Zhang, K Chen - Mechanical Systems and Signal …, 2021 - Elsevier
Identifying the mistuning parameters and calibrating the finite element model (FEM) of the
mistuned blisk in real-time is a meaningful way to acquire the blisk's dynamic characteristics …

Statistical analysis of the nonlinear response of bladed disks with mistuning and cracks

MH Tien, T Hu, K D'Souza - AIAA Journal, 2019 - arc.aiaa.org
In this paper, efficient techniques are presented for analyzing the dynamics of mistuned
bladed disks with cracks. The analysis of the influence of cracks, coupled with the influence …

Experimental and Computational Study of a Rotating Bladed Disk with Under-Platform Dampers

T Krizak, E Kurstak, K D'Souza - AIAA Journal, 2023 - arc.aiaa.org
There has been an extensive amount of work developing reduced-order models (ROMs) for
bladed disks using single-sector models and a cyclic analysis. Several ROMs currently exist …

An experimental and computational investigation of a pulsed air-jet excitation system on a rotating bladed disk

E Kurstak, K D'Souza - Journal of Engineering for …, 2021 - asmedigitalcollection.asme.org
Nonsynchronous vibrations are a difficult problem to address for turbomachines due to the
complex nature of the forcing. Such vibrations can be caused by vortex shedding, flow …

A new experimental facility for characterizing bladed disk dynamics at design speed

K D'Souza, E Kurstak, K Ruff, MG Dunn - AIAA Journal, 2020 - arc.aiaa.org
An experimental facility for structural dynamics programs that uses an above-ground
containment tank specifically designed to house bladed disks operating at design speed is …

Geometric mistuning reduced-order model development utilizing Bayesian surrogate models for component mode calculations

JA Beck, JM Brown… - … for Gas Turbines …, 2019 - asmedigitalcollection.asme.org
Integrally bladed rotors (IBRs) are meant to be rotationally periodic structures. However,
unique variations in geometries and material properties from sector-to-sector, called …

Stochastic reduced order modelling and analysis of rotating bladed discs

R Kumar, SF Ali, S Gupta - Proceedings of the Royal …, 2022 - royalsocietypublishing.org
A computational finite-element (FE)-based technique is proposed for developing a
stochastic reduced order model for rotating bladed disc with spatial random …

Parametric investigation of vibratory responses for reduced-order models of rotating bladed disks

E Kurstak, K D'Souza - AIAA Journal, 2023 - arc.aiaa.org
Attempting to predict the physical response of a complex system under realistic conditions is
extremely challenging. In this work, a parametric reduced-order model (PROM) of a bladed …

Response and EPSD of rotor-blade nonlinear system with non-stationary non-Gaussian stochastic excitation via PGHW method

X Han, OS Jiménez, E Pagnacco - Computers & Mathematics with …, 2023 - Elsevier
The periodic generalized harmonic wavelet (PGHW) method is used to analyze the forced
response of a periodic time-varying rotor-blade nonlinear system undergoing mechanical …

A statistical characterization of the effects and interactions of small and large mistuning on multistage bladed disks

E Kurstak, K D'Souza - Journal of Engineering for …, 2020 - asmedigitalcollection.asme.org
As turbomachinery systems continue to push the limits of modern technology, the modeling
techniques being developed also continue to push modern computational limits. While …