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) nonlinear friction contact conditions at blade roots and shrouds are considered. The following two kinds of analysis are performed: (i) local sensitivity analysis (LSA), based on first-order derivatives of system response with respect to design parameters, and (ii) statistical analysis using polynomial chaos expansion (PCE). The PCE 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.
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April 2019
Research-Article
Analysis of Deformation of Mistuned Bladed Disks With Friction and Random Crystal Anisotropy Orientation Using Gradient-Based Polynomial Chaos Expansion
Rahul Rajasekharan,
Rahul Rajasekharan
School of Engineering and Informatics,
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: R.Rajasekharan-Nair@sussex.ac.uk
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: R.Rajasekharan-Nair@sussex.ac.uk
Search for other works by this author on:
E. P. Petrov
E. P. Petrov
School of Engineering and Informatics,
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: Y.Petrov@sussex.ac.uk
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: Y.Petrov@sussex.ac.uk
Search for other works by this author on:
Rahul Rajasekharan
School of Engineering and Informatics,
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: R.Rajasekharan-Nair@sussex.ac.uk
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: R.Rajasekharan-Nair@sussex.ac.uk
E. P. Petrov
School of Engineering and Informatics,
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: Y.Petrov@sussex.ac.uk
University of Sussex,
Falmer,
Brighton BN1 9RH, UK
e-mail: Y.Petrov@sussex.ac.uk
Manuscript received June 22, 2018; final manuscript received July 4, 2018; published online December 3, 2018. Editor: Jerzy T. Sawicki.
J. Eng. Gas Turbines Power. Apr 2019, 141(4): 041016 (10 pages)
Published Online: December 3, 2018
Article history
Received:
June 22, 2018
Revised:
July 4, 2018
Citation
Rajasekharan, R., and Petrov, E. P. (December 3, 2018). "Analysis of Deformation of Mistuned Bladed Disks With Friction and Random Crystal Anisotropy Orientation Using Gradient-Based Polynomial Chaos Expansion." ASME. J. Eng. Gas Turbines Power. April 2019; 141(4): 041016. https://doi.org/10.1115/1.4040906
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