[MBDyn-users] MBDyn 1.7.1 is out

Pierangelo Masarati pierangelo.masarati at polimi.it
Wed Apr 27 10:59:51 CEST 2016

Dear users,

MBDyn 1.7.1 is out.  The tarball is available at


This release contains several improvements and bug fixes.

The complete changelog is:

MBDyn 1.7.1
         - added ModalBody: body connected to modal node
           (Reinhard Resch)
         - added sprintf function to math parser
         - added "single factor damping" to modal joint
         - added "Rayleigh damping" to modal joint
           (suggested by Reinhard Resch)
         - added check for symmetric/diagonal mass/stiffness
           matrices in modal joint
         - added initial distance as "current" in distance joint
         - added "buffer" stream drive and output element
         - added skeleton for embedding solver(s)
     Backward compatibility issues:
         - "proportional damping" in modal joint replaced by
           "single factor damping"
     Known issues:
     Bug fixes:
         - fixed possibility to turn off output of aero elements
         - fixed structural forces in inverse dynamics
           (Andrea Zanoni, noted by Davide Ivone)
         - fixed off-by-one bug in socket stream drive
         - fixed invalid memory access bug in viscoelastic
           displacement joint Jacobian matrix initial assembly
           (Reinhard Resch); assembly still needs work
         - fixed bug in EasyAnim post-processing of total joints
         - fixed bug in strain gage priv data (noted by Jason)
         - fixed EOF handling on arm
         - fixed check for body connected to modal node
           (noted by Reinhard Resch)
         - fixed parsing of modal joint "origin node" in string format
           (noted by Reinhard Resch)
         - fixed bug in deformable displacement joint Jacobian
           matrix (Andrea Zanoni)
         - fixed bug in stream drive echo, writing old instead of new

Please test and report using the <mbdyn-users at mbdyn.org> mailing list.

Enjoy!  p.

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