Explicit finite element models of friction dampers in forced response analysis of bladed disks

Petrov, E P (2008) Explicit finite element models of friction dampers in forced response analysis of bladed disks. Journal of Engineering for Gas Turbines and Power, 130 (2). ISSN 0742-4795

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Abstract

A generic method for analysis of nonlinear forced response for bladed disks with friction dampers of different designs has been developed. The method uses explicit finite element modeling of dampers, which allows accurate description of flexibility and, for the first time, dynamic properties of dampers of different designs in multiharmonic analysis of bladed disks. Large-scale finite element damper and bladed disk models containing 10(4) - 10(6) degrees of freedom can be used. These models, together with detailed description of contact interactions over contact interface areas, allow for any level of refinement required for modeling of elastic damper bodies and for modeling of friction contact interactions. Numerical studies of realistic bladed disks have been performed with three different types of underplatform dampers: (i) a "cottage-roof" (also called "wedge") damper (ii) seal wire damper and (iii) a strip damper Effects of contact interface parameters and excitation levels on damping properties of the dampers and forced response are extensively explored

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery
Depositing User: Yevgen Petrov
Date Deposited: 27 Nov 2012 07:38
Last Modified: 27 Nov 2012 07:38
URI: http://srodev.sussex.ac.uk/id/eprint/43009
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