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Logo: ISD/Leibniz Universität Hannover
Logo Leibniz Universität Hannover
Logo: ISD/Leibniz Universität Hannover
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Dipl.-Ing. Andreas Ehrmann

 

Appelstr. 9A

30167 Hannover

Room 407

 

Tel.:      +49-511-762-17213

Fax:      +49-511-762-2236

 

E-mail: a.ehrmannisd.uni-hannover.de

 

Consultation hours: by appointment

Teaching Activities

Supervision of student works:

  • Project (B.Sc.) & bachelor theses, seminar (M.Sc.) and master theses are welcome by arrangement

Tutorial Lesson:

Research Focus

  • Simulation of offshore wind turbines with focus on the substructure
  • Multivariate statistics
  • Cluster analysis
  • Structural optimisation

Research Projects

  • Monitoring SBJ - Assessment of monitoring data and numerical model improvement of the Suction Bucket Jacket which has been installed in the offshore wind farm Borkum  Riffgrund 1 – Subproject LUH6: Efficient numerical modelling and model validation (2014 – 2017)

  • WindBucket - Suction bucket foundations as an innovative and installation noise-reducing concept for offshore wind turbines – Subproject LUH2: Structural Dynamics (2012 – 2015)


Proceedings

Andreas Ehrmann, Cristian Guillermo Gebhardt, Raimund Rolfes (2018): Determination of Representative Offshore Wind Turbine Locations for Fatigue Load Monitoring by Means of Hierarchical Clustering, Extended Abstract in Proceedings of International Modal Analysis Conference (IMAC XXXVI), Orlando

Andreas Ehrmann, Nikolai Penner, Cristian Guillermo Gebhardt, Raimund Rolfes (2016): Offshore Support Structures with Suction Buckets: Parameter Fitting of a Simplified Foundation Model, Proceedings of the Twenty-sixth International Ocean and Polar Engineering Conference, Rhodes, pp 52-59

Clemens Hübler, Jan Häfele, Andreas Ehrmann, Raimund Rolfes (2016): Effective consideration of soil characteristics in time domain simulations of bottom fixed offshore wind turbines, Proceedings of the Twenty-sixth International Ocean and Polar Engineering Conference, Rhodes, pp 127-134.

Ehrmann, Andreas; Gerendt, Christian; Rolfes, Raimund (2015): Model Calibration for the Soil-Structure-Interaction of an Offshore Wind Turbine Substructure with Suction Buckets, Extended Abstract in Proceedings of 11th PhD Seminar on Wind Energy in Europe, Stuttgart

Chapter in Books

A. Ehrmann, C. G. Gebhardt, R. Rolfes (2018): Determination of Representative Offshore Wind Turbine Locations for Fatigue Load Monitoring by Means of Hierarchical Clustering, Rotating Machinery, Vibro-Acousitics & Laser Vibrometry., Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics, Volume 7, pp 149-152, Springer, Orlando
ISBN: 978-3-319-74693-7

Technical Reports

Christian Schröder, Klaus Thieken, Tim Gerlach, Jann-Eike Saathoff, Nikolai Penner, Andreas Ehrmann, Tanja Grießmann, Martin Achmus, Raimund Rolfes (2017): Schlussbericht zum Verbundprojekt Monitoring SBJ (Überwachung des Suction Bucket Jackets im Offshore Windpark Borkum Riffgrund 1)
DOI: /10.2314/GBV:1011240475

Christian Schröder, Andreas Ehrmann, Tanja Grießmann, Malte Gottschalk, Patrick Rzeczkowski, Niklas Scholle, Christoph von der Haar, Martin Achmus, Raimund Rolfes, Peter Schaumann, Ludger Lohaus, Steffen Marx (2015): WindBucket - Suction Bucket Gründungen als innovatives und montageschallreduzierendes Konzept für Offshore-Windenergieanlagen, Abschlussbericht, Leibniz Universität Hannover, Seite 191

Presentations

Andreas Ehrmann, Cristian Guillermo Gebhardt, Raimund Rolfes  (2017): A Hierarchical Clustering Approach for Jacket Substructures for Offshore Wind Farms according to Location-Dependent Environmental Conditions, Wind Energy Science Conference, Lyngby

Andreas Ehrmann, Cristian Guillermo Gebhardt, Raimund Rolfes (2017): Hierarchical Clustering of Jacket Substructures for Offshore Wind Farms according to Location-Dependent Environmental Conditions, Wind Energy Systems Engineering Workshop, Roskilde

Ehrmann, Andreas; Thieken, Klaus; Rolfes, Raimund; Achmus, Martin (2015): Comparing a Jacket Substructure with Suction Bucket Foundation to a Pile Foundation, RAVE- Offshore Wind R&D Conference, Bremerhaven

Background

  • since 2014: Research associate at Institute of Structural Analysis
    (Leibniz Universität Hannover)
  • 2009 - 2014: Project engineer for structural analysis at tkb.Technologiekontor Bremerhaven (design of offshore substructures, structural verifications for steel structures, fatigue analysis, design of grouted connections, FE analysis)

  • 2007 - 2009: Diploma degree course: „Civil Engineering“ (TU Berlin), Diploma thesis: „Identification of system parameters for measurement-based data acquisition of structural changes in offshore wind turbine foundations
    (Department of Structural Mechanics)
  • 2002 - 2006: Diploma degree course: “Civil Engineering” (Diploma I, University of Kassel), Diploma thesis: „Concept development for processing, evaluation, and assessment of dynamic vibration measurement data in the course of continuous monitoring of the Gärtnerplatzbrücke (pedestrian bridge) in Kassel
    (Department of Lightweight Structures and Structural Dynamics)