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A novel reduction technique for blisks with contact interfaces in microslip

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URI: http://hdl.handle.net/2042/57042
Title: A novel reduction technique for blisks with contact interfaces in microslip
Author: Mitra, M.; Zucca, S.; Epureanu, B.i.
Abstract: Reduced order models obtained from finite element (FE) models of bladed disks (blisks) are an important design tool. The dynamic behavior of blisks is often complicated by the presence of non-linearities manifested as microslip in contacting substructures. While methods exist to reduce the number of degrees of freedom (DoFs) of linear models and simplify their simulation in the time domains, they do not address the reduction of the non-linear contact DoFs. We present a novel method to obtain a set of reduction basis functions for all the DoFs of the model including the contact interface DoFs. The reduction basis applied to a baseline model generated from a full scale FE model is shown to accurately predict the blisk response, while offering significant savings in computational effort.
Subject: vibrations; microslip contact; reduced order model; non-linear dynamics; turbomachinery
Publisher: AFM, Association Française de Mécanique
Date: 2015

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