Qualitative analysis of forced response of blisks with friction ring dampers |
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| Institution: | 1. Ecole Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systemes (UMR CNRS 5513), Équipe Dynamique des Structures et des Systemes, 36, avenue Guy de Collongue, 69134 Ecully Cedex, France;2. Snecma-Safran group, Rond point Rene Ravaud-Reau, 77550 Moissy-Cramayel, France;1. Imperial College London, London SW7 2AZ, UK;2. Rolls-Royce plc, Derby DE2 48J, UK;1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;2. School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China;3. Department of Mechanics, Shanghai University, Shanghai 200444, China;4. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | A damping strategy for blisks (integrally bladed disks) of turbomachinery involving a friction ring is investigated. These rings, located in grooves underside the wheel of the blisks, are held in contact by centrifugal loads and the energy is dissipated when relative motions between the ring and the disk occur. A representative lumped parameter model of the system is introduced and the steady-state nonlinear response is derived using a multi-harmonic balance method combined with an AFT procedure where the friction force is calculated in the time domain. Numerical simulations are presented for several damper characteristics and several excitation configurations. From these results, the performance of this damping strategy is discussed and some design guidelines are given. |
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