MBDyn - MultiBody Dynamics Download Page
Get the latest release of MBDyn -
free MultiBody/multidisciplinary Dynamics
analysis Software -
or follow the links to the official sites of the related software.
But first make sure you carefully read the
license terms and conditions
and the disclaimer reported below.
See this link
for up-to-date snapshots for Windows XP (compiled under
If you enjoy MBDyn, please consider posting a message
on the firstname.lastname@example.org
mailing list to let us know what you are using MBDyn for.
Interesting projects can be listed in MBDyn's
NOTE: what follows is partially outdated; use at own risk.
MBDyn may use a number of packages that must be downloaded,
configured, built and installed separately if not present
on the target system.
In most cases, those packages are optional, and come with
It is no longer necessary to install special solvers;
especially those with annoying non-free licenses are strongly
discouraged, if support still works at all.
In most cases, the built-in naive solver is all one
needs, since it's faster than any other up to roughly
In any case, installing
is recommended to have another good sparse solver available.
Right now, UMFPACK is very easy to build and install,
so no specific instructions are provided here.
If correctly configured and installed, MBDyn's
configure will find it.
As of this writing, UMFPACK 5.1
either with ATLAS
or with Goto BLAS implementation
is known to work fine with MBDyn.
If there's a good free/libre or open source sparse solver you know of
and you'd like to see it supported in MBDyn, please
let us know.
the LAPACK/CLAPACK libraries.
direct eigenanalysis can be performed using the ARPACK libraries.
the parallel implementation requires:
the symbolic manipulation requires:
(Message Passing Interface) and its portable implementation MPICH (with patches);
To partition the domain, a domain partitioning library is required;
(with a patch) represents the current choice;
Technically speaking, domain partitioning could be performed manually,
although this practice is discouraged unless working on very simple models.
a library that allows to run-time load modules
(usually distributed with libtool).
MBDyn can be easily customized by writing run-time
loadable modules for many purposes.
GiNaC (Note: compiles with gcc >= 3.0);
CLN (see GiNaC's page for related software
MBDyn has been successfully compiled on a number of Unix and Unix-like
It is currently developed under
so it might require some care to compile on other platforms.
The package comes with a configure that allows to trigger
most of the optional features.
It is known to work on:
Binaries for Windows XP built on a somewhat regular basis are available
at this site.
Currently there are no plans to port the software natively
on Microsoft Windows NT/2000/XP; if anyone succeeds in such porting,
please drop us a note
(and possibly a patch :).
There are known issues with some versions
between 3.2 and 3.3, which are obsolete anyway.
since 5.0 and up to 9.0; notes:
HP-UX (aCC, ages ago!)
Digital - Alpha (c89/cxx, ages ago!)
Intel ia64 (icc/gcc, quite some time ago!)
The basic steps are:
The MBDyn package is distributed under Version 2.1 of the
Free Software Foundation's
license (text version),
which basically states*
you can do whatever you want with it (e.g. alter the code and distribute
binaries even for a fee) provided you also distribute the sources,
you don't alter the copyright and the license terms and conditions,
and in case of changes you clearly mark the modified source files as changed.
This is required to make the code as free and open as possible, and
to deny the possibility to restrict its freedom by other parties.
However MBDyn may link third-party code that is licensed under stricter
terms, whose license doesn't allow the distribution of binaries and sources
but allows to get them without any fee from the official repository.
Moreover MBDyn may use third party commercial software that requires
a specific license, which must be purchased separately and independently
The main copyright holders at present are Paolo Mantegazza
and Pierangelo Masarati. Contributors must explicitly share the copyright
of the code they contribute to MBDyn with the main copyright holders,
because the main copyright holders want to be able to act
against any license violations.
The main copyright holders reserve for themselves the right to change
the license of subsequent versions of the code as permitted by the GPL,
because they want to be able to protect the distribution of the code
in case flaws in the license are discovered.
This will not alter any user's rights on an already distributed version.
Any static/dynamic object that comes with MBDyn must be considered
part of the code and NOT a library. As a consequence, it is covered
by the same license as the code.
The package MBDyn is provided AS IS AND WITHOUT ANY EXPLICIT OR IMPLICIT
WARRANTY. The developers' team and the
Dipartimento di Scienze e Tecnologie Aerospaziali
(formerly Dipartimento di Ingegneria Aerospaziale)
of the University
"Politecnico di Milano"
shall not be considered responsible for any damage, including
partial or total loss of data, resulting from the use of MBDyn or from
any implementation bug of MBDyn or any part of it.
As any software, MBDyn cannot be guaranteed to be totally bug-free.
The user is also warned that there may be an appreciable difference
between reality and the analytical models used in the implementation
of the code, which are an idealization of reality.
Moreover, there may exist large uncertainties in the input data,
whose collection and preparation is under the responsibility
of the user.
As a consequence, the results of Computational Mechanics analyses
should always be considered with care and interpreted by users
with specific skills before relying on them when safety is concerned.
Downloading the package implies the acceptance of these conditions
as well as of those stated in the
above mentioned license.
Better read the license anyway :)
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