Shape optimisation for friction dampers with stress constraint

Title: Shape optimisation for friction dampers with stress constraint
Authors: Denimal, E
Chevalier, R
Renson, L
Salles, L
Item Type: Conference Paper
Abstract: Friction dampers are classically used in turbomachinery for bladed discs 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 dissipate 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 parametrised 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 is computed based on the harmonic balance 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 damper geometries that meet the engineers’ requirements can be identified.
Issue Date: 29-Jul-2022
Date of Acceptance: 1-Jul-2022
DOI: 10.1007/978-3-031-04086-3_10
ISBN: 9783031040856
ISSN: 2191-5644
Publisher: Springer International Publishing
Start Page: 65
End Page: 73
Copyright Statement: © 2023 The Society for Experimental Mechanics, Inc.
Conference Name: 40th Conference and Exposition on Structural Dynamics
Publication Status: Published
Start Date: 2022-02-07
Finish Date: 2022-02-10
Conference Place: Orlando, United States
Open Access location:
Online Publication Date: 2022-07-29
Appears in Collections:Mechanical Engineering
Faculty of Engineering