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contributor authorOuyang, Luohui
contributor authorShang, Hai
contributor authorChen, Hua
contributor authorBi, Qingzhen
contributor authorZhu, Li-Min
date accessioned2022-02-04T14:48:46Z
date available2022-02-04T14:48:46Z
date copyright2020/04/29/
date issued2020
identifier issn0742-4795
identifier othergtp_142_05_051013.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4274427
description abstractBlisks are subjected to frequent acceleration and deceleration, which leads to a transient forced response; however, there is limited understanding of this response. In this work, the mechanism on prediction of transient maximum amplitude is found. An analytical link is proposed between the transient maximum amplitude and a fundamental dimensionless parameter which combines the damping ratio, natural frequency, acceleration, and engine order of the system to reveal the mechanism of the transient maximum amplitude. Therefore, the transient maximum amplitudes of tuned and mistuned blisks are predicted analytically. First, a lumped parameter model is used to study the mechanism of the transient maximum amplitude for a tuned blisk, and an approximated analytical expression is derived between the fundamental parameter and the transient amplification factor of a 1DOF (degree-of-freedom) model. The relationship is also applicable to a reduced order, tuned finite element model (FEM). Second, the mechanism of the transient response for a mistuned blisk is studied in the decoupled modal space of the blisk, based on the 1DOF transient relationship. The transient maximum amplitude in a reduced order, mistuned FEM is predicted. Two lumped parameter models and a FEM are employed to validate the prediction.
publisherThe American Society of Mechanical Engineers (ASME)
titleThe Mechanism on Prediction of Transient Maximum Amplitude for Tuned and Mistuned Blisks
typeJournal Paper
journal volume142
journal issue5
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4046761
page51013
treeJournal of Engineering for Gas Turbines and Power:;2020:;volume( 142 ):;issue: 005
contenttypeFulltext


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