Michael A. Sprague: Research - Fluid-Structure Interaction

 

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Fluid-Structure Interaction

 

Overview and motivation:

I have been involved in compuational modeling of fluid-structure interaction (FSI) since starting my graduate work in Fall 1997. Most of this work has been done in collaboration with my PhD advisor, Prof. Thomas Geers, with whom I still collaborate. More recently, I have become involved in the development of Localized Lagrange Multipliers with Prof. Carlos Felippa, Dr. Mike Ross (Sandia Nat. Lab.), and Prof. K.C. Park.

The focus of my FSI work has been time-dependent interaction of an acoustic fluid with an elastic structure, with particular interest in problems where the fluid is subject to cavitaiton, a highly nonlinear phenomena. This class of problems is of great importance when predicting the response of a naval structure to an underwater explosion, or the excitation of a dam due to an earthquake.

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Fluid-Structure Interaction:
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Fluid-Structure Interaction: Relevant publications

  • Ross, M., M.A. Sprague, C.A. Felippa, and K.C. Park, Treatment of acoustic fluid-structure interaction by localized Lagrange multipliers: 2D and 3D simulations. Computer Methods in Applied Mechanics and Engineering. Submitted for review on 16 June 2008; accepted for publication.

  • Ross, M., C.A. Felippa, K.C. Park, and M.A. Sprague, Treatment of acoustic fluid-structure interaction by localized Lagrange multipliers: Formulation. Computer Methods in Applied Mechanics and Engineering, Vol. 197, 2008, 3057-3079 (view pdf).

  • Sprague, M.A. and T.L. Geers, A spectral/finite-element analysis of a frigate-like structure subjected to an underwater explosion. Computer Methods in Applied Mechanics and Engineering, Vol. 195, 2006, 2149-2167 (view pdf).

  • Sprague, M.A. and T.L. Geers, A spectral-element method for modeling cavitation in transient fluid-structure interaction. International Journal for Numerical Methods in Engineering, Vol. 60, No. 15 2004, pp. 2467-2499 (view pdf), with erratum appearing in Vol. 61, p. 1976 (view pdf).

  • Sprague, M.A. and T.L. Geers, Spectral elements and field Separation for an acoustic fluid subject to cavitation. Journal of Computational Physics, Vol. 184, 2003, pp. 149-162 (view pdf) .

  • Sprague, M.A. and T.L. Geers, Computational approximations for near-free-surface shock analysis. Shock and Vibration, Vol. 8, No. 2, 2001, pp. 105-122 (view pdf).

  • Sprague, M.A. and T.L. Geers, Response of empty and fluid-filled, submerged spherical shells to plane or spherical, step-exponential waves. Shock and Vibration, Vol. 6, 1999, pp. 147-157 (view pdf).

  • Complete list of M.A. Sprague's publications

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