Our research is motivated by the desire to better understand, model and simulate complex vibrations and waves. Complexity here often arises from multi-scale and multi-physics problems, and the interplay between nonlinearity, problem size, and non-stationarity. Application fields include the structural and wave dynamics of mechanical systems from mechanical, aerospace, and offshore engineering. We study novel phenomena, including rare and extreme events. And we develop new engineering methods for complex dynamical systems. Often integrating physics based approaches with data driven methods from machine learning.
Complex Machine and System Dynamics
Complex machines and systems operate under unsteady loads and exhibit highly nonlinear, irregular, non-stationary, and multi-scale dynamics. We investigate those dynamics using advanced signal processing techniques and machine learning (ML) for system identification and behavior prediction. Particular focus of our research lies in the combination of physics-based simulations with data-driven methods: physics-informed learning, digital twins and explainable artificial intelligence (XAI).
The Dynamics Group is focussing on the untameable power of the sea and addresses all aspects that arise from this complex environment. The research comprises the investigation of complex non-linear sea state processes in order to understand and predict the genesis of critical or extreme wave events as well as to evaluate the respective consequences on offshore structures in terms of wave-structure-investigations….
Deep learning for brake squeal: Brake noise detection, characterization and prediction
M. Stender, M. Tiedemann, D. Spieler, D.Schoepflin, N. Hoffmann, S. Oberst
Mech. Syst. Signal Process., 149, 2021, 107181
On the Deterministic Prediction of Water Waves
M. Klein, M. Dudek, G. F. Clauss, S. Ehlers, J. Behrendt, N. Hoffmann, M.Onorato
Fluids 2020, 5, 9.
Nonlinear real time prediction of ocean surface waves,
N. Köllisch, J. Behrendt, M. Klein, N. Hoffmann
Ocean Engineering 157, 387-400, 2018
Peregrine breathers as design waves for wave-structure interaction
M. Klein, G. F. Clauss, S. Rajendran, C. G. Soares, M. Onorato
Ocean Engineering 128, 199-212, 2016
Rogue wave observation in a water wave tank
A. Chabchoub, N. Hoffmann, and N. Akhmediev
Phys. Rev. Lett. 106, 204502
A minimal model for studying properties of the mode-coupling type instability in friction induced oscillations
N. Hoffmann, M. Fischer, R. Allgaier, L. Gaul
Mech. Res. Commun. 29.4, 2002, 197-205
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