Topological Optimisation of Friction Dampers for Nonlinear Resonances Mitigation

Denimal, Enora; Renson, Ludovic; Salles, Loïc

doi:10.1007/978-3-030-81166-2_1

Cited by 3 publications

References 20 publications

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Shape Optimisation for Friction Dampers with Stress Constraint

Denimal

Chevalier

Renson

et al. 2022

Nonlinear Structures &Amp; Systems, Volume 1

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Friction dampers are classically used in turbomachinery for bladed disks to control the levels of vibrations at resonance and limit the risk of fatigue failure. It consists of small metal components located under the platforms of the blades, which dissipates the vibratory energy through friction when a relative displacement between the blades and the damper appears. It is well known that the shape of such component has a strong influence on the damping properties and should be designed with a particular attention. With the arrival of additive manufacturing, new dedicated shapes for these dampers can be considered, determined with specific numerical methods as topological optimisation (TO). However, the presence of the contact nonlinearity challenges the use of traditional TO methods to minimise the vibration levels at resonance. In this work, the topology of the damper is parametrized with the Moving Morphable Components (MMC) framework, and optimised based on meta-modelling techniques: here kriging coupled with the Efficient Global Optimisation (EGO) algorithm. The level of vibration at resonance are computed based on the harmonic balanced method augmented with a constraint to aim directly for the resonant solution. It corresponds to the objective function to be minimised. Additionally, a mechanical constraint based on static stress analysis is also considered to propose reliable damper designs. Results demonstrate the efficiency of the method and show that dampers geometries that meet the engineers' requirements can be identified.

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Shape Optimisation for Friction Dampers with Stress Constraint

Denimal

Chevalier

Renson

et al. 2022

Nonlinear Structures &Amp; Systems, Volume 1

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Topology Optimization of 3D-printed joints under crash loads using Evolutionary Algorithms

Bujny

Olhofer

Aulig

et al. 2021

Struct Multidisc Optim

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Geometric design of friction ring dampers in blisks using nonlinear modal analysis and Kriging surrogate model

Sun

Denimal

Yuan

et al. 2022

Struct Multidisc Optim

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Integrally bladed disks (blisk) have been widely used in the turbo-machinery industry due to its high aerodynamic performance and structural efficiency. A friction ring damper (FRD) is usually integrated in the system to improve its low damping. However, the design of the geometry of this FRD become complex and computationally expensive due to the strong nonlinearities from friction interfaces. In this work, we propose an efficient modelling strategy based on advanced nonlinear modal analysis and Kriging surrogate models to design and optimize the geometry of a 3D FRD attached to a high fidelity full-scale blisk. The 3D ring damper is parametrised with a few key geometrical parameters. The impact of each geometric parameter and their sensitivities to nonlinear dynamic response can be efficiently assessed using Kriging meta-modelling based on a few damped nonlinear normal modes. Results demonstrate that the damping performances of ring dampers can be substantially optimized through the proposed modelling strategy whilst key insights for the design of the rings are given. It is also demonstrated that the distribution of the contact normal load on the contact interfaces has a strong influence on the damping performances and can be effectively tuned via the upper surface geometry of the ring dampers.

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Topological Optimisation of Friction Dampers for Nonlinear Resonances Mitigation

Cited by 3 publications

References 20 publications

Shape Optimisation for Friction Dampers with Stress Constraint

Shape Optimisation for Friction Dampers with Stress Constraint

Topology Optimization of 3D-printed joints under crash loads using Evolutionary Algorithms

Geometric design of friction ring dampers in blisks using nonlinear modal analysis and Kriging surrogate model

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