CAD: COMSOL - Mulitbody Dynamics Module

CAD: COMSOL - Mulitbody Dynamics Module
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The Multibody Dynamics Module is an add-on to the Structural Mechanics Module that provides an advanced set of tools to design and optimize multibody structural mechanics models using finite element analysis. The module enables simulation of a mixed system of flexible and rigid bodies, each of which may be subjected to large rotational and translational displacements.

A library with eight different types of joints to connect different bodies is included in the module. The relative motion of the bodies can be restricted in a model by specifying rotational and translational constraints in addition to locking. Researchers and engineers can design accurate multibody structural mechanics models using the following joint types included in the Multibody Dynamics Module:

  • Prismatic (3D, 2D)
  • Hinge (3D, 2D)
  • Cylindrical (3D)
  • Screw (3D)
  • Planar (3D)
  • Ball (3D)
  • Slot (3D)
  • Reduced Slot (3D, 2D)

All bodies in a multibody structural mechanics model have elastic properties by default and can be made rigid through tagging them selectively with a Rigid Domain property. Boundaries or parts of boundaries of these flexible bodies can also be made rigid. You can give your multibody dynamics design and analyses nonlinear material properties by combining models in the Multibody Dynamics Module with either the Nonlinear Structural Materials Module or the Geomechanics Module. Transient, frequency-domain, eigenfrequency, and stationary multibody dynamics analyses can be performed. Joints can be assigned linear/torsional springs with damping properties, applied forces and moments, and prescribed motion as a function of time. Analysis and postprocessing capabilities include:

  • Relative displacement/rotation between two components and their velocities
  • Reaction forces and moments at a joint
  • Local and global coordinate-system frames of reference
  • Stresses and deformations in flexible bodies
  • Fatigue analysis of critical flexible bodies by combining with the Fatigue Module
Note: To use any of the COMSOL Modules, a COMSOL Multiphysics Base License pass is required. All module software is included with the COMSOL Multiphysics download file, which means you need to download only once.

Licensing Requirements or Restrictions

  • Access is authorized within the geographic boundaries of Canada only.
  • Use of this design tool is restricted to university research only.
  • Faculty with a Professor Research Subscription receive access that allows you, your students, and your research staff to access COMSOL software.
  • Five concurrent use instances per tool from the subscriber’s research team, up to the limits of the available licenses in the shared pool.
  • Access for one year 
  • Acceptance of the vendor licenses terms, including the Academic Addendum, on first use.

For more information, contact the Licensing Administrator at or call 613-530-4787.

Acknowledging CMC

If your research benefits from products and services provided by CMC Microsystems, please acknowledge this support in any publications about your work. For more information, please visit Acknowledge CMC.