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contributor authorNyssen, Florence
contributor authorBatailly, Alain
date accessioned2022-02-06T05:32:41Z
date available2022-02-06T05:32:41Z
date copyright10/12/2021 12:00:00 AM
date issued2021
identifier issn0742-4795
identifier othergtp_143_12_121015.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4278252
description abstractIn this work, the impact of small mistuning on rotor/stator contact interactions is investigated. First, a detailed study of a rotor/stator interaction between the first bending modes and the second engine order is presented in the tuned case. Then, a numerical investigation on the effect of mistuning on the studied rotor/stator contact interaction is carried out. In particular, a stochastic analysis is performed to evaluate the robustness of the interaction with respect to the mistuning level. Simulations are conducted using a reducedo rder model (ROM) of an industrial-bladed disk that combines both physical degrees-of-freedom (along blades tip for contact treatment) and modal coordinates. Mistuning is introduced in the tuned ROM by means of a modified version of the component mode mistuning method that allows to keep physical degrees-of-freedom within the reduced basis. Nonlinear amplification factors, i.e., the amplification factors in the context of contact nonlinearities, are compared with their linear counterparts, and the latter are computed using a linear forcing on each blade using a two nodal diameters traveling wave excitation on the mistuned and the tuned bladed disk. The comparison between the linear and nonlinear amplification factor for each sample highlights that no correlation exists between a mistuning pattern leading to high amplifications in a linear context or when contact nonlinearities are taken into account. Therefore, dedicated analyses on the effect of mistuning should be undertaken with contact nonlinearities considerations at the design stage especially if intentional mistuning is considered.
publisherThe American Society of Mechanical Engineers (ASME)
titleInvestigation on the Robustness of Rotor/Stator Contact Interactions With Respect to Small Mistuning
typeJournal Paper
journal volume143
journal issue12
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4051957
journal fristpage0121015-1
journal lastpage0121015-10
page10
treeJournal of Engineering for Gas Turbines and Power:;2021:;volume( 143 ):;issue: 012
contenttypeFulltext


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