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Release 7.5 MADYMO Coupling Manual

7.3 Radioss Input Deck Setup

This section describes the required modiﬁcations to the Radioss input deck to perform Ex-

tended Coupling or Basic Coupling simulations. See the Radioss User Manual for details on

the cards not mentioned here speciﬁcally. Modiﬁcations to the MADYMO input deck are de-

scribed in Sec.

7.3.1 Basic Coupling

• Note that Radioss only uses the value of EXTERNAL_REF. However, the attribute EX-

TERNAL_DATA is mandatory in MADYMO and must therefore be given a value, be it

arbitrary.

• For Radioss, planes will be output in Radioss ANIMATION ﬁles, but no contact compu-

tation is possible with Radioss FE in Radioss.

• The interfaces TYPE 14 and 15 allow to compute contact between MADYMO hyper-

ellipsoids and Radioss FE. The option /MADYMO/LINK allows to connect a Radioss

node to a MADYMO body. (See the Radioss CRASH input manual for a description of

the options /MADYMO/LINK, /SURF/MDELLIPS, /INTER/TYPE14 and /INTER/-

TYPE15).

Input Example Basic Coupling

The following is part of a MADYMO input deck for Basic Coupling:

<COUPLING_SURFACE

EXTERNAL_REF="10"

SURFACE="/2/1"

EXTERNAL_DATA="0.0"/>

</COUPLING>

This will send data from surface /2/1 to Radioss. In Radioss one may refer to this data using

reference 10. Note the arbitrary value 0.0 for EXTERNAL_DATA, which is not used in Radioss.

The following is part of a Radioss STARTER input deck for Basic Coupling:

/SURF/MDELLIPS/1001/The first madymo coupl’d surface

Veriﬁcation

The user is advised to check the log ﬁle and the reprint ﬁle to verify if all entities are communi-

cated correctly. The log ﬁle shows the Radioss output of all entities received from MADYMO,

the reprint ﬁle shows the entities MADYMO sends to Radioss.

The Radioss STARTER log ﬁle:

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 62 63

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