# mor4fem

The software mor4fem has been developed at IMTEK. It is a command-line tool built on top of: 1. An ANSYS-supplied library to read ANSYS binary files 2. The TAUCS library for sparse linear algebra

mor4fem is a command-line tool built on top of the ANSYS-supplied library to read ANSYS binary files [1] and the TAUCS library for sparse linear algebra [2]. After a model is build and meshed in ANSYS, an ordinary differential equation (ODE) system of the first- or second-order is obtained, its dimension being routinely from 10 000 to 500 000. The information from ANSYS is transferred as a file with element matrices (EMAT file) and lists for Dirichlet boundary conditions, nodal forces and output degrees of freedoms. The developed software uses these files as input and produces a reduced model by means of the block Arnoldi algorithm. The postprocessing, that is the solution of a reduced ODE system as well as computing its transfer function is performed currently in Mathematica.

mor4fem can write the original linear high-dimensional system from ANSYS in the Matrix Market format.

If you would like to use mor4fem, please contact Jan Korvink at korvink@imtek.uni-freiburg.de.

[1] Guide to interfacing with Ansys, ANSYS corporation.

[2] S. Toledo, D. Chen, V. Rotkin, TAUCS – A library of sparse linear solvers, http://www.tau.ac.il/~stoledo/taucs/.