Method for direct parametric analysis of nonlinear forced response of bladed disks with friction contact interfaces

Petrov, E P (2004) Method for direct parametric analysis of nonlinear forced response of bladed disks with friction contact interfaces. Journal of Turbomachinery, 126 (4). pp. 654-662. ISSN 0889-504X

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Abstract

An effective method for direct parametric analysis of periodic nonlinear forced response of bladed disks with friction contact interfaces has been developed. The method allows, forced response levels to be calculated directly as a function of contact interface parameters such as the friction coefficient, contact surface stiffness (normal and tangential coefficients), clearances, interferences, and the normal stresses at the contact interfaces. The method is based on exact expressions for sensitivities of the multiharmonic interaction forces with respect to variation of all parameters of the friction contact interfaces. These novel expressions are derived in the paper for a friction contact model, accounting for the normal load variation and the possibility of separation-contact transitions. Numerical analysis of effects of the contact parameters on forced response levels has been performed using large-scale finite element models of a practical bladed turbine disk with underplatform dampers and with shroud contacts.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Yevgen Petrov
Date Deposited: 06 Feb 2012 19:51
Last Modified: 30 Nov 2012 10:36
URI: http://sro.sussex.ac.uk/id/eprint/22624
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