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 …

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 …

Parametric reduced order models for bladed disks with mistuning and varying operational speed

E Kurstak, R Wilber, K D'Souza - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
A considerable amount of research has been conducted to develop reduced order models
(ROMs) of bladed disks that can be constructed using single sector calculations when there …

A method for static analysis of multistage cyclic structure based on group theory and two-stage Guyan reduction

D Xie, Y Zheng, B Wang, S Xu, Y Sui, Q Gao - Computers & Structures, 2024 - Elsevier
Considering the non-negligible multistage coupling effect of stages in multi-stage cyclic
structure, such as bladed disk systems in aircraft turbo engines, a method is established for …

A model reduction method for bladed disks with large geometric mistuning using a partially reduced intermediate system model

L Schwerdt… - … of Engineering for …, 2021 - asmedigitalcollection.asme.org
Reduced order models (ROMs) are widely used to enable efficient simulation of mistuned
bladed disks. ROMs based on projecting the system dynamics into a subspace spanned by …

Transient dynamic analysis of cracked structures with multiple contact pairs using generalized HSNC

MH Tien, K D'Souza - Nonlinear Dynamics, 2019 - Springer
The development of efficient computational methods for cracked structures is critical in the
fields of civil, mechanical, and aerospace engineering since the influence of cracks on …

Mistuning identification of blisks using mass detuning and influence coefficients

M Cimpuieru, ST Kelly, A Lupini, C Keener, K D'Souza… - AIAA Journal, 2023 - arc.aiaa.org
Integrally bladed disks, also known as blisks, are important components in the operation of
gas turbines. To study the dynamics of these structures, several computational techniques …

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 …

Efficient hybrid symbolic-numeric computational method for piecewise linear systems with Coulomb friction

A Shahhosseini, MH Tien… - Journal of …, 2023 - asmedigitalcollection.asme.org
A wide range of mechanical systems have gaps, cracks, intermittent contact or other
geometrical discontinuities while simultaneously experiencing Coulomb friction. A piecewise …