Journal
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
Volume 147, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2020.107074
Keywords
Mistuning identification; Model calibration; Blade tip timing; Digital twin
Categories
Funding
- National Natural Science Foundation of China [U1808214, 51775030, 91860126]
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Identifying mistuning parameters and calibrating the FEM of the mistuned blisk in real-time is meaningful for acquiring dynamic characteristics and predicting stress response. The synergistic effect of mass and stiffness mistuning is presented by a standard coefficient. The BR-IDC approach improves FEM precision through real-time mistuning identification and model calibration.
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 and predict its stress response. Because of the wearing and other reasons, the blisk's mistuning is changing during the operation. Hence a BTT based rotating-blisk mistuning identification and model calibration (BR-IDC) method in real-time has become a necessity. The rotating effects (stiffening, softening and Coriolis force) are considered in the BR-IDC. The synergistic effect of the mass and stiffness mistuning is analyzed, and the effect is presented by a standard mistuning coefficient. Based on the BR-IDC, the on-line real-time mistuning identification for the rotating blisk is realized. Furthermore, the FEM was calibrated by the identification results. The BR-IDC approach is verified by FEM simulation and experimental work. The precision of the FEM is improved through the calibration. (C) 2020 Elsevier Ltd. All rights reserved.
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