User`s guide

Release 7.5 MADYMO Coupling Manual

interface routines

MADYMO

interface routines

PARTNER

Figure 1.1: Illustration of the communication through the coupling interface.

Basic versus Extended Coupling

The Direct coupling and the MPP coupling differ in what type of data is communicated be-

tween MADYMO and the PARTNER. Precisely, the direct coupling supports both basic cou-

pling as well as extended coupling and combinations thereof. MPP coupling only supports

extended coupling. Basic and Extended coupling are deﬁned as follows:

• MB object data is communicated; at each time integration point, displacements are sent

from MADYMO to the PARTNER code, which in turn sends forces acting upon these

objects back to MADYMO. This is called

Basic Coupling

In basic coupling, the PARTNER program builds a copy of the MB object natively in MA-

DYMO. This copy allows the PARTNER program to put forces acting on the MB object,

and to display it in its kinematic output ﬁle.

• FE data is communicated; at each time integration point, nodal displacements are sent

from the PARTNER program to MADYMO, which in turn sends forces acting on these

nodes back to the PARTNER program. This is called the

Extended Coupling

In extended coupling, MADYMO builds a copy of (part of) the FE model it receives from

the PARTNER program. Now MADYMO can put forces on the nodes, and display the

FE model in the kinematic output ﬁle (KIN3 ﬁle).

• It is also possible to mix these two couplings. This is called

Combined Coupling

For direct coupling the reprint ﬁle reﬂects the coupling type under the - - - COUPLING - - -

section.

All coupling types synchronize their time step, so the minimum of the PARTNER and MADY-

MO time step is taken.