Applied Computational Mathematics Division


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Recent Advances in Finite Element Methods for Structural Acoustics

Saikat Dey
Naval Research Laboratory, on contract from SFA, Inc.

Tuesday, March 28, 2006 15:00-16:00,
NIST North (820), Room 145
Gaithersburg
Tuesday, March 28, 2006 13:00-14:00,
Room 5000
Boulder

Abstract: This talk will discuss several recent advances in finite element-based methods and their impact on the solution of large-scale problems in frequency-domain structural acoustics. Main areas covered include:

entity-based p-version approximations,
infinite elements and PML approximations for exterior problems,
subdomain-based residual error estimation, and
domain-decomposition (FETI-DP) approach for scalable parallelism.

Implementation of these ideas into a software infrastructure, called STARS3D, will be discussed. Numerical examples presented will demonstrate the wide applicability and advantages of STARS3D in solving problems in three-dimensional structural acoustics and elastodynamics. Application areas covered include interior noise analysis, exterior acoustic radiation and scattering from submerged (visco) elastic structures, and acoustic transmission loss. Scalability metrics for both single and multiple frequency sweeps on leading parallel computing platforms will be presented. This work is funded by the Office of Naval Research.

Speaker Bio: Dr. Dey's primary research interest and expertise is in computational mechanics and numerical analysis as applied to the physics-based solution of problems arising from a range of engineering and scientific disciplines. He earned his PhD in Computational Mechanics from Rensselaer Polytechnic Institute. Since 1997, Dr. Dey has been an on-site contractor with the Physical Acoustics Branch of the Naval Research Laboratory where he designed and developed STARS3D, a parallel, three-dimensional, hp-finite-element-based numerical infrastructure for modeling a wide range of problems dealing with vibratory and structural-acoustic response of fluid-structure systems. Earlier, as part of his graduate studies, Dr. Dey developed several novel algorithms for use in automatic discretization of CAD models, many of which have been incorporated in leading commercial mesh-generation software. Dr. Dey is a member of the United States Association for Computational Mechanics (USACM).

Presentation Slides: PDF

Contact: W. F. Mitchell

Note: Visitors from outside NIST must contact Robin Bickel; (301) 975-3668; at least 24 hours in advance.