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Analysis of deformation of mistuned bladed disks with friction and random crystal anisotropy orientation using gradient-based polynomial chaos expansion

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posted on 2023-06-06, 09:40 authored by Rahul Rajasekharan Nair, Yevgen PetrovYevgen Petrov
Single crystal blades used in high pressure turbine bladed disks of modern gas-turbine engines exhibit material anisotropy. In this paper the sensitivity analysis is performed to quantify the effects of blade material anisotropy orientation on deformation of a mistuned bladed disk under static centrifugal load. For a realistic, high fidelity model of a bladed disk both: (i) linear, and (ii) non-linear friction contact conditions at blade roots and shrouds are considered. The following two kinds of analysis are performed: (i) local sensitivity analysis, based on first order derivatives of system response w.r.t design parameters, and (ii) statistical analysis using polynomial chaos expansion. The polynomial chaos expansion is used to transfer the uncertainty in random input parameters to uncertainty in static deformation of the bladed disk. An effective strategy, using gradient information, is proposed to address the “curse of dimensionality” problem associated with statistical analysis of realistic bladed disk.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition: Volume 7C: Structures and Dynamics

Publisher

American Society of Mechanical Engineers

Event name

ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition

Event location

Oslo, Norway

Event type

conference

Event date

June 11–15, 2018

ISBN

9780791851159

Department affiliated with

  • Engineering and Design Publications

Notes

ISBN 9780791851159

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-07-16

First Open Access (FOA) Date

2019-08-30

First Compliant Deposit (FCD) Date

2018-07-15

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