Welcome to the WavStructDamAs Benchmark Home

Benchmark scope

The benchmark consists of the algorithms of various types of wavelet transforms and supporting tools, which can be applied to the measurement or simulation data obtained during vibration-based testing of composite structures in order to detect various types of damage. For the purposes of testing of various wavelet-based approaches in diagnostics and damage assessment of composite structures 143 example problems were implemented. It is also possible to upload own user data for performing the analysis. The benchmark was programmed in Matlab® as a GUI application, which allows for simple and quick analysis of data using the implemented processing tools.

Objectives

Comparing wavelet-based algorithms applied for the structural diagnostics and damage assessment of composite elements as well as analysis of detectability of various damage types (including cracks, delaminations, voids, impact damage) using the vibration-based testing and wavelet-based processing of measurement data. The benchmark is intended to be applied for supporting the vibration-based structural diagnostics both in laboratory and industrial environment.

Functionality and assumptions

The benchmark is based on the Matlab® environment with using the Matlab® Wavelet Toolbox™. This toolbox is required for proper work of the WavStructDamAs benchmark.

The benchmark covers the following wavelet transforms for 1D problems:

  • Continuous Wavelet Transform (based on Matlab® Wavelet Toolbox™)
  • Discrete Wavelet Transform (based on Matlab® Wavelet Toolbox™)
  • Stationary Wavelet Transform (based on Matlab® Wavelet Toolbox™)
  • Undecimated Wavelet Transform (based on Matlab® Wavelet Toolbox™)
  • Complex Wavelet Transform (based on routines developed by Ivan Selesnick and his team at the Brooklyn Polytechnic University, Brooklyn, NY, USA, more information available at: http://eeweb.poly.edu/iselesni/WaveletSoftware/index.html)
  • Discrete Fractional Wavelet Transform (based on routines developed by Michael Unser and his team at the Biomedical Imaging Group, School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, more information available at: http://bigwww.epfl.ch)

for 2D problems:

for 3D problems:

  • Discrete Wavelet Transform (based on Matlab® Wavelet Toolbox™)
  • Complex Wavelet Transform (based on routines developed by Ivan Selesnick and his team at the Brooklyn Polytechnic University, Brooklyn, NY, USA, more information available at: http://eeweb.poly.edu/iselesni/WaveletSoftware/index.html)

Additional processing tools for removing the boundary effect during wavelet transform and for performing isotropic wavelet analysis were developed by Andrzej Katunin using Matlab® Wavelet Toolbox™ functions.

Support

The benchmark was prepared under the realization of the research project financed by the National Science Centre (Poland) granted according the decision No. DEC-2011/03/N/ST8/06205 and under the realization of computational grant No. MNiSW/IBM_BC_HS21/PSlaska/012/2013 on the supercomputer IBM BladeCenter HS21 in the Academic Computer Centre CYFRONET AGH provided by the Ministry of Science and Higher Education of Poland.

License and availability

WavStructDamAs is a free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or any later version.

This software is distributed in a hope that it will be useful, but WITHOUT ANY WARRANTY, WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The software and documentation provided hereunder is on an "as is" basis, and the copyright holders have no obligations to provide maintenance, support, updates, enhancements or modifications. In no event shall the copyright holders be liable to any party for direct, indirect, special, incidental or consequential damages, including lost profits, arising out of the use of this software and its documentation, even if the copyright holders have been advised of the possibility of such damage. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library in the file named "COPYING.txt" included with the software distribution. A copy is also available online at: http://sbml.org/software/libsbml/COPYING.html for your convenience.

WavStructDamAs benchmark documentation is free and can be distributed and/or modified according to the Creative Commons license terms applied to each file (usually CC-BY or CC-BY-SA). For more information on Creative Commons license, please visit the Creative Commons website: http://creativecommons.org/licenses.