A program for the dynamic analysis of flexible multibody systems
3D Rigid bodies
3D trusses, 3D membranes, 3D solid finite elements with large displacements and strains.
Hyperelastic material models.
Non-linear springs and dampers
Joints: spherical, clindrical, revolute, planar.
Joint clearances (smooth, only spherical and revolute)
Basic constraint library: constant distance, alignment, prescribed angle, etc.
Static / Dynamic analyses
Time integrators: explicit (4th order Runge Kutta, central differences, 4th Adams-Bashford) and implicit (beta Newmark, HHT, 1st-4th BDF, 5th Adams-Moulton, midpoint, energy-momentum)
Contact / impact with rigid walls
Interactive output graphical interface with
Object-oriented structure, C++
OS: Linux, Unix
User's manual (spanish)
PDF (168 KB)
General view of an interactive simulation with EPI/GEOMVIEW.
JPG (125 KB)
Vehicle with deformable chassis over an obstacle.
JPG (26 KB)
Swing. Each chain is composed by 15 rigid articulated links
JPG (7.8 KB
2D finite element analysis, stress contours.
JPG (27 KB)
See more images of actual calculations performed by EPI for
flexible multibody dynamics
and in the context of project
related to the robust analysis of joints.
Grupo de Mecánica Computacional
Universidad Politécnica de Madrid
Last update: 25/08/2004