Armin W. Troesch

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Research interests have expanded over the years from initial work in slender body diffraction forces, hydroelastic springing, and wave energy devices to now include nonlinear dynamics, high-speed planing, impact hydrodynamics, extreme vessel motions and loads, oscillatory, time-dependent real flows, and stern flap hydrodynamics/design. The research involves the application of experimental, theoretical, and numerical methods. The goal of these efforts has been twofold: to define accurate hydrodynamic models that permit the determination of the nonlinear fluid loads and, once having identified the proper hydrodynamic model, solve, both qualitatively and quantitatively, the complicated nonlinear equations of motion. While these research activities have generated a new and better understanding of the physical phenomena involved, they have also provided undergraduate, Masters level, Professional-level, and Ph.D. level support in addition to creating opportunities for collaborative faculty efforts.

• ME211 Introduction to Statics and Strength of Materials
• NA 310 Ship Strength I
• NA 320 Ship Resistance and Propulsion I
• NA 401 Small, High-Speed Craft
• NA 421 Ship Model Testing
• NA 440 Marine Dynamics II
• NA 490 Directed Study, Research and Special Problems
• NA 520 Marine Hydrodynamics III
• NA 526 Naval Hydrodynamics II (similar to the expanded NA 540)
• NA 540 Marine Dynamics III
• NA 575 Computer-Aided Marine Design Project
• NA 591 Reading and Seminar in Naval Architecture
• NA 621 Experimental Marine Hydrodynamics
• NA 792 Professional Thesis
• New and Revised Courses Introduced at the University of Michigan:
• NA 440: Marine Dynamics II, Introduced completely revised course Fall 1977 to 31 students.
• NA540: Marine Dynamics III, Introduced a completely revised four-hour course Fall 1993 to 19 students.
• NA 621: Experimental Marine Hydrodynamics, Spring 1980 (team-taught with three others), Taught ten times since to 5 to 12 students.

• Seyffert, H., Kim, D-H, and Troesch, A. W., “Rare Wave Groups”. Ocean Engineering. Vol. 122 1 August 2016, Pages 241–252. doi:10.1016/j.oceaneng.2016.05.053
• Seyffert, H., and Troesch, A. W., “Data Mining Pt. Reyes Buoy For Rare Wave Groups”. Journal of Offshore Mechanics and Arctic Engineering. Vol. 138, February, 2016.
• Kim, D., and Troesch, A.W., ” Statistical Estimation of Extreme Roll Responses in Short Crested Irregular Head Seas, ” 2013 SNAME Transactions, presented at SNAME Annual Meeting, Bellevue, WA, Nov 2013.
• Hodapp, D.P., Kim, D-H., and Troesch, A. W., “On the finite approximation of a Gaussian process and its effect on extreme value theory”. Ocean Engineering. (2012), http://dx.doi.org/10.1016/j.oceaneng.2012.10.009, and Vol. 58, pp. 135-143, JAN 15 2013
• Kim, D., Engle, A. and Troesch, A.W., “Estimates of Long-Term Combined Wave Bending and Whipping for Two Alternative Hull Forms, ” SNAME Transactions, presented at SNAME Annual Meeting, Houston, Nov 2011. (Recipient of the SNAME-ABS – Captain Joseph H. Linnard Prize for best paper in the Transactions of the Society, 2012)
• Alford, L. and Troesch, A. W. “Generating Extreme Ship Responses using Non-Uniform Phase Distributions”, Ocean Engineering, Vol. 36, No. 9-10, Jul. 2009, pp. 641-649.
• McCue, Leigh, and Troesch, A. W. “Probabilistic Determination of Critical Wave Height for a Multi-degree of Freedom Capsize Model,” Ocean Engineering, Vol 32/13, pp1608-1622, 2005.
• Jiang, C., Troesch, A. W., and Shaw, S. S. “Global Stability Analysis for a Time-varying Dynamic System under Random Excitation,” Theme Issue on Nonlinear Dynamics of Ships, Philosophical Transactions of the Royal Society, London. June 15, 2000
• Thiagarajan, K.P. and Troesch, A., “Hydrodynamic Damping Estimation and Scaling for Tension Leg Platforms,” Journal of Offshore Mechanics and Arctic Engineering, Vol. 116, 1994, pp. 70-76.
• Hsieh, S-R., Troesch, A.W., Shaw, S., “A Nonlinear Probabilistic Method for Predicting Vessel Capsizing,” Proceedings of the Royal Society, London. 446, 1994, pp. 195-211.
• Troesch, A. and Hicks, J.D., “The Efficient Use of Simulation in Planing Hull Motion Analysis,” Naval Engineers Journal, January 1994, pp. 75-85. (Recipient of the American Society of Naval Engineers’ “Jimmie” Hamilton Award for the best original paper published in the Naval Engineers Journal during the year 1994.)
• Falzarano, J., Shaw, S., and Troesch, A., “Application of Global Methods for Analyzing Dynamical Systems to Ship Rolling Motion and Capsizing,” International Journal of Bifurcation and Chaos in Applied Sciences and Engineering, March, 1992, pp. 101-116.
• Troesch, A.W., “On the Hydrodynamics of Vertically Oscillating Planing Hulls,” Journal of Ship Research, Vol. 36, No. 4, December 1992, pp. 317-331.
• Kim, S. and Troesch, A., “Streaming Flows Generated by High Frequency-Small Amplitude Oscillations of Arbitrarily Shaped Cylinders, ” Physics of Fluids A, Vol.1, No. 6, June 1989, pp. 975-985.
• Troesch, A.W., “Wave Induced Hull Vibrations – An Experimental and Theoretical Study,” Journal of Ship Research, Vol. 28, No. 2, June 1984, pp. 141-150.