MIT Center for Ocean Engineering in the Department of Mechanical Engineering Acoustics Group

Henrik Schmidt

Professor of Mechanical and Ocean Engineering

You are visitor number

to this page since Dec. 4, 1997.

---

LocalTime

Contact Info:

Deaprtment: Mechanical Engineering
Center for Ocean Engineering
Office: MIT rm 5-204
77 Massachusetts Ave
Cambridge, MA 02139
Phone: (617) 253-5727
Fax: (617) 253-2350
Email: henrik@mit.edu

Proposed program to assimilate oceanographic and acoustic data into acoustic and oceanographic models to obtain nowcasts and forecasts of the ocean environment.

Professional Information

Laboratory Affiliations

Research

OASES

SUPERSNAP

MPEG format Animations

Teaching

• 13.863 Ocean Seismo-Acoustics

  1. Fundamentals of ocean waveguide theory. Wavenumber representation of acoustic field in stratified
     ocean waveguides. Normal modes. Perkeris waveguide. (Basically reviewing 13.861 material)
     
  2. Stress wave propagation in isotropic elastic media. Definition of stress and strain. Constitutive
     equations. Equations of motion. Wave field potentials. Seismic interface waves.
     
  3. The fluid solid interface. Reflection and transmission of plane waves. Point source fields. Seismic
     interface waves.
     
  4. Propagation over and within a stratified elastic sea bed. Numerical solution techniques. Seismic effects
     on water column field. Love waves. Interface wave dispersion. Seismic attenuation.
     
  5. Seismic waves in Arctic ice cover. Plate modes. Interaction with the water column.
     
  6. Propagation in anisotropic media. Mechanisms of anisotropy in the sea bed and ice cover. Constitutive
     equations. Equations of motion. Effects on field in water column.
     
  7. Propagation in porous media. The Biot-Stoll equations. Boundary conditions. Reflectivity characteristics.
     
  8. Propagation of low frequency, surface generated ambient noise. Source mechanisms. Correlated source
     distributions. Propagation characteristics.
     
  9. Experimental techniques in ocean seismo-acoustics. Hydrophone and geophone arrays. Source of
     seismic waves.
     
  10. Determination of seismic properties in ocean environment. Inverse methods. Matched field processing.

• 13.014 Marine Structures and Materials

  Fundamentals of solid mechnaics and materials science needed for design and fabrication of marine
  structures. Topics related to solid mechanics include advanced beam theory, beam buckling, plastic
  beam response, and structural failure. Topics related to materials science include atomic structures of
  materials, phase diagrams, mechanical properties, cutting and joining techniques.
  

• 13.002J Introduction to Numerical Analysis for Engineers

• 13.853 Computational Ocean Acoustic

• 13.811 Advanced Structural Dynamics and Acoustics

Recent Publications

• F.B. Jensen, W.A. Kuperman, M.B. Porter, and H. Schmidt. Computational Ocean Acoustics. American Institute of Physics, New York, 1994.
• O. Diachok, A. Caiti, P. Gerstoft, and H. Schmidt [Eds.], Full field inversion methods in ocean and seismic acoustics, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1995.
• A.L. Kurkjian, R.T. Coates, J.E. White, and H. Schmidt, Finite-difference and frequency-wavenumber modeling of seismic monopole sources and receivers in fluid-filled boreholes, Geophysics, 59:1053--1064, 1994.
• K. LePage and H. Schmidt, Modeling of low frequency transmission loss in the Central Arctic, J. Acoust. Soc. Am. 96:1783--1795, 1994.
• J.E. Bondaryk and H. Schmidt, Array processing for the analysis of stiffened, fluid-loaded cylindrical shells, J. Acoust. Soc. Am., 97:1067--1077, 1995.
• H. Schmidt and W.A. Kuperman, Spectral representations of rough interface reverberation in stratified ocean waveguides, J. Acoust. Soc. Am., 97:2199--2209, 1995.
• H. Schmidt, W. Seong, and J. T. Goh, Spectral super-element approach to range-dependent ocean acoustic modeling, J. Acoust. Soc. Am., 98: 465--472, 1995.
• T. Kapoor and H. Schmidt, Spherical coordinate Green's function for ring tractions in a solid unbounded medium, J. Acoust. Soc. Am. 98:2783--2791, 1995.
• J.T. Goh and H. Schmidt, A hybrid coupled wave-number integration approach to range-dependent seismo-acoustic modeling, J. Acoust. Soc. Am., 100:1409--1420, 1996.
• J.T. Goh, H. Schmidt, P. Gerstoft and W. Seong Benchmarks for validating range-dependent seismo-acoustic propagation codes, IEEE J. Oceanic Eng. , In Press, April 1997.
• B. Tracey and H. Schmidt Seismo-acoustic field statistics in shallow water, IEEE J. Oceanic Eng. , In Press, April 1997.
• P. Elisseeff and H. Schmidt, Acoustic Propagation through a low Mach number stratified flow, J. Acoust. Soc.
  Am., 101(4):1936-1944, 1997.
• M. Deffenbaugh and H. Schmidt, Optimal orthogonal function representation and inversion for sound speed
  profile variability, Submitted, J. Acoust. Soc. Am., 1997.
• R.J. Cederberg, M. Collins, H. Schmidt, W.L. Siegmann, Rational operators for filtering, Submitted, J. Acoust.
  Soc. Am., 1997.
• P. Elisseeff, H. Schmidt, M. Johnson, M. Gund, N.R. Chapman, M.M. McDonald, Acoustic tomography of a
  coastal front in Haro Strait, British Columbia, Submitted J. Acoust. Soc. Am., Febuary 1997.
• H. Schmidt and J. Lee, Physics of 3-D scattering from rippled seabeds and buried targets in shallow water, J. Acoust. Soc. Am., 105(3), 1999.