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Stereo-DIC Measurements of a Vibrating Bladed Disk: In-Depth Analysis of Full-Field Deformed Shapes
Article

Validation of a Modal Work Approach for Forced Response Analysis of Bladed Disks

Department of Industrial Engineering, University of Florence, Via S. Marta 3, 50139 Florence, Italy
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Author to whom correspondence should be addressed.
Academic Editors: Paolo Neri, Ciro Santus and Christian Maria Firrone
Appl. Sci. 2021, 11(12), 5437; https://doi.org/10.3390/app11125437
Received: 27 May 2021 / Revised: 4 June 2021 / Accepted: 7 June 2021 / Published: 11 June 2021
(This article belongs to the Special Issue Bladed Disks Structural Dynamics)
The paper describes a numerical method based on a modal work approach to evaluate the forced response of bladed disks and its validation against numerical results obtained by a commercial FEM code. Forcing functions caused by rotor–stator interactions are extracted from CFD unsteady solutions properly decomposed in time and space to separate the spinning perturbation acting on the bladed disk in a cyclic environment. The method was firstly applied on a dummy test case with cyclic symmetry where the forcing function distributions were arbitrarily selected: comparisons for resonance and out of resonance conditions revealed an excellent agreement between the two numerical methods. Finally, the validation was extended to a more realistic test case representative of a low-pressure turbine bladed rotor subjected to the wakes of two upstream rows: an IGV with low blade count and a stator row. The results show a good agreement and suggest computing the forced response problem on the finer CFD blade surface grid to achieve a better accuracy. The successful validation of the method, closely linked to the CFD environment, creates the opportunity to include the tool in an integrated multi-objective procedure able to account for aeromechanical aspects. View Full-Text
Keywords: blade vibration; forced response; forcing decomposition; cyclic symmetry; modal work blade vibration; forced response; forcing decomposition; cyclic symmetry; modal work
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MDPI and ACS Style

Pinelli, L.; Lori, F.; Marconcini, M.; Pacciani, R.; Arnone, A. Validation of a Modal Work Approach for Forced Response Analysis of Bladed Disks. Appl. Sci. 2021, 11, 5437. https://doi.org/10.3390/app11125437

AMA Style

Pinelli L, Lori F, Marconcini M, Pacciani R, Arnone A. Validation of a Modal Work Approach for Forced Response Analysis of Bladed Disks. Applied Sciences. 2021; 11(12):5437. https://doi.org/10.3390/app11125437

Chicago/Turabian Style

Pinelli, Lorenzo, Francesco Lori, Michele Marconcini, Roberto Pacciani, and Andrea Arnone. 2021. "Validation of a Modal Work Approach for Forced Response Analysis of Bladed Disks" Applied Sciences 11, no. 12: 5437. https://doi.org/10.3390/app11125437

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