Dr. Leo Dostal


Dr. Leo Dostal

Dr. Leo Dostal

Adresse
Technische Universität Hamburg
Mechanik und Meerestechnik
Eißendorfer Straße 42 (M)
21073 Hamburg
Büro
Gebäude M
Raum 0518
Telefon
Tel: +49 40 42878 2209
Fax: +49 40 42878 2028
  • dostal at tuhh.de

 

Sprechstunde im Wintersemester 2019/2020:

Donnerstags in der Zeit von 10:00 Uhr bis 11:00 Uhr in Raum 0518, Gebäude M


Research Interests

  • Fluid Dynamics and Fluid-Structure Interaction
  • Stochastic and Partial Differential Equations
  • Stochastic Averaging
  • Nonlinear Filtering
  • Optimization and Optimal Control

Publications

legend:  black = published;   orange = submitted;  green = accepted

    • Dostal, L., Sri Namachchivaya, N.  : First Passage Time of Nonlinear Diffusion Processes with Singular Boundary Behavior. In: Journal of Sound and Vibration
    • Dostal, L.  : The effect of random wind forcing in the nonlinear Schrödinger equation. In: Fluids 4 (2019), No. 3, 121
    • Hollm, M., Dostal, L.  (2019): Study of weakly nonlinear water waves subjected to stochastic wind excitation. In: Proceedings of the 18th International Congress of the Maritme Association of the Mediterranean (IMAM) (Varna, Bulgaria, September 9-11, 2019)
    • Dostal, L.  : Reduction of nonlinear dynamical systems excited by random loads. In: PAMM-Proc. in Appl. Math. Mech. (2019)
    • Maki, A., Dostal, L., Maruyama, Y., Minoura, M., Katayama, T., Sakai, M., Sugimoto, K., Fukumoto, Y., Umeda, N.  (2019): Theoretical Estimation of Roll Amplitude for Nonlinear Equation of Motion in Beam Seas. In: Conference proceedings, the Japan Society of Naval Architects and Ocean Engineers (Himeji, Japan)
    • Maki, A., Dostal, L., Maruyama, Y., Minoura, M., Katayama, T., Sakai, M., Sugimoto, K., Fukumoto, Y., Umeda, N.  (2019): New Theoretical Estimation Method of Roll Acceleration and Jerk in Beam Seas with use of PDF Line Integral. In: Conference proceedings, the Japan Society of Naval Architects and Ocean Engineers (Himeji, Japan)
    • Dostal, L., Hollm, M., Kreuzer, E.  : Study on the Behavior of Weakly Nonlinear Water Waves in the Presence of Random Wind Forcing. In: Nonlinear Dynamics, DOI: 10.1007/s11071-019-05416-5
    • Cyr, C., Dostal, L., Duecker, D.-A., Kreuzer, E.  (2019): Towards Reinforcement Learning-based Control of an Energy Harvesting Pendulum. In: European Control Conference (ECC19) (Naples, Italy, June 25-28, 2019)
    • Dostal, L., Pick, M.-A.  : Theoretical and Experimental Study of a Pendulum Excited by Random Loads. In: European Journal of Applied Mathematics 30 (2019), No. 3, 912-927
    • Dostal, L., Korner, K., Kreuzer, E., Yurchenko, D.  : Pendulum Energy Converter Excited by Random Loads. In: ZAMM-Journal of Applied Mathematics and Mechanics 98 (2018), No. 3, 349-366
    • Chai, W., Dostal, L., Naess, A., Leira, BJ.  : A Comparative Study of the Stochastic Averaging Method and the Path Integration Method for Nonlinear Ship Roll Motion in Random Beam Seas. In: Journal of Marine Science and Technology 23 (2018), No. 4, 854-865
    • Dostal, L., Lourens, E., Metrikine, A.  : Nonlinear model parameter identification for ice-induced vibrations. In: Procedia Engineering 199 (2017), 583-588
    • Chai, W., Dostal, L., Naess, A., Leira, BJ.  : Comparative Study of the Path Integration Method and the Stochastic Averaging Method for Nonlinear Roll Motion in Random Beam Seas. In: Procedia Engineering 199 (2017), 1110-1121
    • Dostal, L., Pick, M.  (2017): Power Generation of a Pendulum Energy Converter excited by Random Loads. In: Proceedings of the 9th European Nonlinear Oscillations Conference (Budapest, Hungary, June 25-30, 2017)
    • Glessmer, M., Seifert, C., Dostal, L., Konchakova, N.,  Kruse, K. (2016): Opportunities for individual practice and assessment in a large undergraduate mathematics course, 6th International Symposium for Engineering Education (Sheffield, England,  July  14-15, 2016)
    • Dostal, L., Kreuzer, E. :  Analytical and Semi-Analytical Solutions of Some Fundamental Nonlinear Stochastic Differential Equations. In:  Proc. IUTAM  19 (2016), 178-186
    • Dostal, L., Kreuzer, E. (2014): Assessment of Extreme Rolling of Ships in Random Seas. In: 33th International Conference on Ocean, Offshore and Arctic Engineering OMAE 2014 (San Francisco, USA, June 8-13, 2014)
    • Dostal, L., Kreuzer, E. (2014): Error estimation and error evolution of the Local Statistical Linearization method. In: Proceedings of the 8th European Nonlinear Oscillations Conference (Viena, Austria, July 6-11, 2014)
    • Dostal, L., Kreuzer, E. : Surf-Riding Threshold of Ships in Random Seas. In: PAMM-Proc. in Appl. Math. Mech. (2013)
    • Dostal, L., Kreuzer, E. (2013): Non-stationary probability of parametric roll of ships in random seas. In: V International Conference on Computational Methods in Marine Engineering MARINE 2013 (Hamburg, Germany, May 29-31, 2013)
    • Dostal, L., Kreuzer, E., Namachchivaya, N. S. (2013): Stochastic averaging of roll-pitch and roll-heave motion in random seas. In: IUTAM Symposium on Multiscale Problems in Stochastic Mechanics (Karlsruhe, Germany, June 25-28, 2012)
    • Dostal, L., Kreuzer, E., Sri Namachchivaya, N. : Non-standard Stochastic Averaging of Large Amplitude Ship Rolling in Random Seas. In: Proc. R. Soc. A 468 (2012), No. 2148, 4146–4173
    • Dostal, L., Kreuzer, E. : Almost Sure Stability Analysis of Parametric Roll in Random Seas Based on Top Lyapunov Exponent. In: PAMM-Proc. in Appl. Math. Mech. (2012)
    • Dostal, L., Kreuzer, E. : Probabilistic approach to large amplitude ship rolling in random seas. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225 (2011), No. 10, 2464-2476
    • Dostal, L., Kreuzer, E. ; Namachchivaya, N. S. (2011): Ship Capsizing Analysis in Random Seas Using Non-standard Stochastic Averaging. In: Proceedings of the 7th European Nonlinear Oscillations Conference (Rom, Italy, July 24-29, 2011)
    • Dostal, L., Kreuzer, E. : Analysis of Nonlinear Stochastic Ship Dynamics under Extended Wave Modeling. In: PAMM-Proc. in Appl. Math. Mech. (2010)
    • Dostal, L., Kreuzer, E. : Numerical Computation of Parametric Induced Roll Motions in Random Seas. In: PAMM-Proc. in Appl. Math. Mech. (2009)


Invited Talks

  • Oktober 2019:  Workshop on Statistical Inference for Stochastic PDEs, Humboldt-Universität zu Berlin, Germany
  • Oktober 2018:  “Random Nonlinear Ocean Waves and Seismic Waves“, Delft University of Technology, Netherlands
  • April 2014: “Nonlinear Stochastic Dynamics of Ships in Random Seas” and “Optimal Control of Flight Trajectories”, Universidade Federal do Rio Grande do Norte, Brazil
  • September 2012: “Sea state modeling and parameter identification from measured ship response”, Workshop on Dynamical Systems, University of Illinois at Urbana-Champaign, USA
  • April 2011: “Non-standard Stochastic Averaging”, Nonlinear Systems Group Seminar, University of Illinois at Urbana-Champaign, USA
  • June 2010: “Analysis of Nonlinear Stochastic Ship Dynamics using Stochastic Averaging”, Humboldt-Universität zu Berlin, Germany

Presentations

  • June 2019: 17th European Control Conference (ECC19), "Towards Reinforcement Learning-based Control of an Energy Harvesting Pendulum", Naples, Italy
  • June 2019: BOSCH Workshop on Machine Learning enabled Reliability for Components and Materials, Renningen, Germany, "Reinforcement Learning Framework for Complex Nonlinear Systems on Computationally Constrained Hardware Setups", Renningen, Germany
  • Februar 2019: GAMM Annual Meeting 2019, "Nonlinear dynamical systems excited by large amplitude random loads", Vienna, Austria
  • Mai 2018: Symposium on Dynamical Systems and Related Fields, "Random dynamics of floating wave energy converters", University of Waterloo, Canada
  • September 2017: X International Conference on Structural Dynamics, EURODYN 2017 "Nonlinear model parameter identification for ice-induced vibrations", Rome, Italy
  • January 2017: 18th DNV GL Workshop "Analytical formulas for first passage time and stability regions of intact ships in random seas", Trondheim, Norway
  • January 2016: 17th DNV GL Workshop "Development of new probabilistic stability criteria for intact ships in random seas", Hamburg, Germany
  • July 2015: IUTAM Symposium Analytical Methods in Nonlinear Dynamics, Frankfurt, Germany, "Analytical and semi-analytical solutions of some fundamental nonlinear stochastic differential equations"
  • May 2015: SIAM Conference on Applications of Dynamical Systems, Snowbird, USA, "Error assessment of the local statistical linearization method"
  • July 2014: 8th European Nonlinear Dynamics Conference, Vienna, Austria, "Error estimation and error evolution of the local statistical linearization method"
  • June 2014: 33rd International Conference on Ocean, Offshore and Arctic Engineering (OMAE2014), San Francisco, USA, "Assessment of extreme rolling of ships in random seas"
  • October 2013: 5th GACM Colloquium on Computational Mechanics, Hamburg, Germany, "Roll dynamics of ships in random seas"
  • May 2013: 5th Int. Conf. on Computational Methods in Marine Engineering, Hamburg, Germany, "Non-stationary probability of parametric roll of ships in random seas"
  • March 2013: GAMM Annual Meeting 2012, Novi Sad, Serbia, "Surf-riding threshold of ships in random seas"
  • June 2012: IUTAM Symposium on Multiscale Problems in Stochastic Mechanics, Karlsruhe, Germany, "Stochastic averaging of roll-pitch and roll-heave motion in random seas"
  • March 2012: GAMM Annual Meeting 2012, Darmstadt, Germany, "Almost sure stability criterion for parametric roll in random seas based on top Lyapunov exponent"
  • July 2011: 7th European Nonlinear Dynamics Conference, Rome, Italy, "Ship capsizing analysis in random seas using non-standard stochastic averaging"
  • March 2010: GAMM Annual Meeting 2010, Karlsruhe, Germany, "Analysis of nonlinear stochastic ship dynamics under extended wave modeling"
  • March 2009: GAMM Annual Meeting 2009, Gdańsk, Poland, "Numerical computation of parametric induced roll motions in random seas"

Poster Presentations

  • June 2017: 9th European Nonlinear Dynamics Conference, Budapest, Hungary, "Power Generation of a Pendulum Energy Converter excited by Random Loads"

Supervised Student Theses

  • J. Gauerke : "Numerische Untersuchung von Schiffen mit unterschiedlichen Rumpfformen bezüglich parametrisch angeregtem Rollen im natürlichen Seegang", project work, Hamburg University of Technology, 2009
  • C. Radisch : "Theoretische und experimentelle Untersuchung zur stochastischen Resonanz an einem mechanischen Schwinger", project work, Hamburg University of Technology, 2010
  • C. Wieghard : "Numerische Untersuchung deterministisch und stochastisch angeregter nichtlinearer dynamischer Systeme mit der Zellabbildungsmethode", project work, Hamburg University of Technology, 2011
  • S. Garcia : "Simulation of ship dynamics in harmonic waves using finite volume solver for RANSE", project work, Hamburg University of Technology, 2011
  • P. Mishra : "Optimisation of case transportation process consisting of accelerating conveyors and lifter", Master-Thesis, Procter & Gamble Service GmbH and Hamburg University of Technology, 2011
  • M. Cretu : "Reduction and Analysis of a Softening Spring Type Duffing Oscillator using Stochastic Averaging", Master-Thesis, Hamburg University of Technology, 2012
  • J. Wehling : "Validation of a new probabilistic stability criterion for a ro-ro ship", project work, Hamburg University of Technology, 2017
  • L. Peters : "Comparison of nonlinear filtering methods for self localization on a field with the Humanoid Nao-robotics system", Bachelor-Thesis, Hamburg University of Technology, 2017
  • M. Hollm : "Study of weakly nonlinear water waves subjected to stochastic wind excitation", Master-Thesis, Hamburg University of Technology, 2018
  • A. Bespalko : "Systematic study on reinforcement-learning-based control of an Acrobot", Bachelor-Thesis, Hamburg University of Technology, 2019
  • N. Thomsen : "Computation and comparison of linear and nonlinear water waves", Bachelor-Thesis, Hamburg University of Technology, 2019

Teaching

  • Vorlesung Mechanik I Repetitorium SS 2016
  • Vorlesung Mechanik I Repetitorium SS 2017
  • Vorlesung Mechanik I Repetitorium SS 2018
  • Vorlesung Optimierung dynamischer Systeme WS 2018/19
  • Vorlesung Mechanik I Repetitorium SS 2019
  • Vorlesung Mechanik III WS 2019/20

Research stays

  • April 2011: University of Illinois at Urbana-Champaign, Department of Aerospace Engineering, USA, visiting Prof. N. Sri Namachchivaya, 1 month, funded by National Science Foundation
  • September 2012: University of Illinois at Urbana-Champaign, Department of Aerospace Engineering, USA, visiting Prof. N.Sri Namachchivaya, 3 weeks
  • April 2014: Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Mecânica, Brazil, visiting Prof. M. Bessa, 3 weeks, funded by Deutscher Akademischer Austauschdienst 
  • September 2018:  Delft University of Technology, Netherlands, funded by Delft University of Technology 
  • March 2020:  Osaka University, Japan, funded by Osaka University