mboct-mbdyn-pkg^©

mboct-mbdyn-pkg belongs to a suite of packages which can be used for pre- and postprocessing of MBDyn models (https://www.mbdyn.org) with GNU-Octave (http://www.gnu.org/software/octave/). This package provides interfaces between the multibody dynamics software MBDyn and the GNU Octave programming language.

List of features

• Generate MBDyn input files for arbitrary curved beam structures represented by Non-Uniform Rational B-Splines (NURBS).
• Generate MBDyn input files for modal elements based on Finite Element models.
• Run the multibody dynamics solver MBDyn.
• Load output files from MBDyn.
• Compute inertia properties of groups of several rigid and flexible bodies.
• Compute frequency response functions of linearized equations of motion.
• Scale elastic deformations of flexible bodies for post-processing.
• Do post-processing of elastohydrodynamic bearing data from MBDyn.

Copyright^© 2019-2021

Reinhard

Installation

The following code is an example how mboct-mbdyn-pkg can be installed on an Ubuntu system:

sudo apt-get install octave liboctave-dev libsuitesparse-dev libarpack2-dev libmumps-seq-dev libmetis-dev octave-nurbs libmkl-full-dev

git clone -b develop https://public.gitlab.polimi.it/DAER/mbdyn.git

pushd mbdyn

./bootstrap.sh

./configure --with-static-modules --enable-octave --enable-sparse_autodiff --enable-autodiff --disable-Werror CXXFLAGS="-O3 -Wall -march=native" CPPFLAGS=-I/usr/include/suitesparse --with-arpack --with-umfpack --without-metis

make -j4

sudo make install

popd

git clone -b master https://github.com/octave-user/mboct-octave-pkg.git

make -C mboct-octave-pkg install_local

git clone -b master https://github.com/octave-user/mboct-numerical-pkg.git

make -C mboct-numerical-pkg install_local

git clone -b master https://github.com/octave-user/mboct-mbdyn-pkg.git

make -C mboct-mbdyn-pkg install_local

GNU Octave installation

• Follow the instructions on (http://www.gnu.org/software/octave/) to install GNU Octave.
• Make sure, that mkoctfile is installed.
  mkoctfile --version

MBDyn installation:

• Clone the source tree of MBDyn.
  git clone https://public.gitlab.polimi.it/DAER/mbdyn.git -b develop
• Compile and install MBDyn.
  cd mbdyn
./bootstrap.sh
./configure CXXFLAGS=-O3 --enable-octave --enable-autodiff --with-static-modules --with-umfpack
make
make install

GNU Octave package installation:

• Make sure that the GNU Octave nurbs package is installed.
  octave --eval 'pkg install -forge nurbs'
• Install the following packages from github.
  for pkg in octave mbdyn; do
git clone https://github.com/octave-user/mboct-${pkg}-pkg.git && make -C mboct-${pkg}-pkg install_local
done

Usage

• Run Octave.
  octave
• At the Octave prompt load the package.
  pkg load mboct-mbdyn-pkg
• At the Octave prompt execute a demo.
  demo mbdyn_post_ehd_load_output