The Tribomechadynamics Research Challenge: Confronting Blind Predictions for the Linear and Nonlinear Dynamics of a Novel Jointed Structure with Measurement Results

Date

2023-3-8

Author

Özgüven, Hasan Nevzat
Krack, Malte
Matthew R. W. Braked
Schwingshacklb, Christoph
Grossa, Johann
Hippolda, Patrick
Lasenb, Matias
Dinib, Daniele
Sallesc, Loic
Allene, Matthew S.
Shettyd, Drithi
Paynee , Courtney A.
Willnerg, Kai
Lenggerg, Michael
Khanh , Moheimin Y.
Ortizh, Jonel
Najera-Floresi, David A.
Kuetherh, Robert J.
Milesh, Paul R.
Xuj, Chao
Yangj, Huiyi
Jalalik, Hassan
Taghipourl, Javad
Khodaparastl, Hamed Haddad
Friswelll, Michael I.

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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The present article summarizes the submissions to the recently announced Tribomechadynamics Research Challenge. The task was a blind prediction of the vibration behavior of a system comprising a thin plate clamped on two sides via bolted joints. Both geometric and frictional contact nonlinearities are expected to be relevant. Provided were the CAD models and technical drawings of all parts as well as assembly instructions. The main objective was to predict the frequency and damping ratio of the lowest-frequency mode as function of the amplitude. Many different prediction approaches were pursued, ranging from well-known methods to very recently developed ones. After the submission deadline, the system has been fabricated and tested. The aim of this article is to interpret the deviations among the predictions and to confront the predictions with experimental results. This way, we intend to evaluate the current state of the art in modelling and vibration prediction of nonlinear mechanical systems, and to provide directions for future methodological advancements.

Subject Keywords

Friction damping, Jointed structures, Geometric nonlinearity, Nonlinear dynamics, Nonlinear modal analysis

URI

https://hdl.handle.net/11511/105215

Collections

Department of Mechanical Engineering, Article