Effects of the geometry of friction interfaces on the nonlinear dynamics of jointed structure
File(s)
Accepted version
Author(s)
Yuan, Jie
Salles, Loic
Schwingshackl, Christoph
Type
Conference Paper
Abstract
Friction interfaces are commonly used in large-scale engineering systems for mechanical joints. They are known to significantly shift the resonance frequencies of the assembled structures due to softening effects and to reduce the vibration amplitude due to frictional energy dissipation between substructural components. It is also widely recognized that the geometrical characteristics of interface geometry have a significant impact on the nonlinear dynamical response of assembled systems. However, the full FE modeling approaches including these geometrical characteristics are extremely expensive. In this work, the influence of geometry of friction interfaces is investigated by using a multi-scale approach. It consists in integrating a semi-analytical contact solver into a high-fidelity nonlinear vibration solver. A highly efficient semi-analytical solver based on the boundary element method is used to obtain the pressure and gap distribution from the contact interface with different geometrical characteristics. The static pressure and gap distribution are then used as input for a nonlinear vibration solver to evaluate nonlinear vibrations of the whole assembled structure. The effectiveness of the methodology is shown on a realistic “Dogbone” test rig, which was designed to assess the effects of blade root geometries in a fan blade disk system. The friction joints with different interface profiles are then investigated. The obtained results show that the effects of the surface geometrical characteristics can have a significant impact on the damping and resonant frequency behavior of the whole assembly.
Date Issued
2022
Date Acceptance
2021-11-01
Citation
2022, pp.67-74
ISBN
9783030771348
ISSN
2191-5644
Publisher
Springer International Publishing
Start Page
67
End Page
74
Journal / Book Title
Conference Proceedings of the Society for Experimental Mechanics Series
Copyright Statement
© 2022 The Society for Experimental Mechanics, Inc. The final publication is available at Springer via https://doi.org/10.1007/978-3-030-77135-5_7
Source
Proceedings of the 40th IMAC, A Conference and Exposition on Structural Dynamics 2022
Publication Status
Published
Date Publish Online
2021-11-17