NEWS

  • 28 OCT 2020VA-FDTD was updated (version 1.1.09). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 06 SEP 2020VA-FDTD and FORTRAN VA-FDTD SOLVER were updated (version 1.1.08 and version 1.1.02, respectively). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 29 AUG 2020FORTRAN VA-FDTD SOLVER was updated (version 1.1.01). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 17 JUN 2020VA-FDTD was updated (version 1.1.07). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 25 AUG 2019VA-FDTD was updated (version 1.1.06). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 05 AUG 2019MATLAB FUNCTION M-FILES were updated (version 1.1.01). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 25 APR 2019VA-FDTD was updated (version 1.1.05). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 17 APR 2019VA-FDTD was updated (version 1.1.04). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 05 MAR 2019A reference was added to HOME.
  • 09 FEB 2019VA-FDTD was updated (version 1.1.03). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 19 JAN 2019A reference was added to HOME.
  • 01 NOV 2018A reference was added to HOME.
  • 15 SEP 2018VA-FDTD was updated (version 1.1.02). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 03 SEP 2018A reference was added to HOME.
  • 23 FEB 2018A reference was added to HOME.
  • 23 FEB 2018The English version of this web site was proofread. Along with that, ACKNOWLEDGEMENT was added to HOME and all English pages were updated.
  • 13 FEB 2018The English versions of VA-FDTD helps were added (version 1.1.01). Along with that, DOWNLOAD and TUTORIAL pages were updated.
  • 1 FEB 2018The English version of this web site was launched. VA-FDTD and FORTRAN VA-FDTD SOLVER were majorly updated (version 1.1.00). MATLAB FUNCTION M-FILES was updated (version 1.1.00). Along with those, HOME, DOWNLOAD, TUTORIAL, and FAQ pages were updated. For details, unzip the downloaded files and refer to each RELEASE_NOTE.txt.
  • 23 DEC 2015FORTRAN VA-FDTD SOLVER was updated (version 1.0.01). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 16 DEC 2015VA-FDTD was updated (version 1.0.02). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 22 OCT 2015The SKETCHUP plugin (version 1.0.00) for exporting a DXF file was released. Along with that, HOME, LICENSE, DOWNLOAD, and TUTORIAL pages were updated.
  • 02 OCT 2015VA-FDTD was updated (version 1.0.01). Along with that, DOWNLOAD page was updated. For details, unzip the downloaded file and refer to RELEASE_NOTE.txt.
  • 17 SEP 2015This website was introduced at the autumn meeting of the Acoustical Society of Japan.
  • 15 SEP 2015This website was opened.

OUTLINE

VibroAcoustic Finite-Differece Time-Domain (VA-FDTD) is a Windows software for analyses of wave propagation in elastic bodies. The features are listed below. For further information, please refer to the References at the bottom of this page.
VA-FDTD

  • is based on the finite-difference time-domain (FDTD) method.
  • assumes small deformation and adiabatic transition.
  • can analyse motions and interactions of solid and fluid.
  • can take viscosity and flow resistivity into account.
  • can consider orthotropy like wooden materials have.
  • can set 10 types of boundary conditions including the Perfectly Matched Layer.
  • can discretize a target region with a nonuniform mesh.

VA-FDTD consists of the following three software. Please also refer to the figure below.

  • VA-FDTD INTERFACE reads the shape data created by shape modelers and sets analysis configurations.
  • VA-FDTD CHECKER checks whether the spatial discretization is done as intended.
  • VA-FDTD SOLVER reads the shape and configuration data and calculates the wave propagation based on the FDTD method.

Framework Image

Zoom IconClick image to zoom up

Vectorworks, SketchUp Pro, and Shade3D are recommended as a shape modeler (CAD software), but free SketchUp Make 2017 with plugin is also available. MATLAB and free ParaView are recommended as a result viewer. For MATLAB, function m-files for displaying results output by VA-FDTD SOLVER are provided.

References

ACKNOWLEDGEMENT

The author of this site, Masahiro Toyoda, would like to thank Dr. Gyani Shankar Sharma in the University of New South Wales (UNSW Sydney) for his great help to correct all the English sentences in this site.

To Top