Our research is motivated by the desire to understand nonlinear, complex processes. Here, the versatile research activities can be summarized under two main research areas. Aspects of naval architecture and ocean engineering, in particular focussing on the interaction between arbitrary offshore structures and the sea, are addressed in the research area "Offshore Dynamics". Data-intense research on complex dynamics is addressed in the "Machine Learning Dynamics" area, where we aim at Digital Twin models combining classical approaches with modern Machine Learning for state monitoring, system identification, and behavior prediction.
The Offshore 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….
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).
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