Data Mapping.pdf

8/14/2019 Data Mapping.pdf

1/3

05.11.2013 Data Mapping

catiadoc.free.fr/online/estug_C2/estugfq0400.htm

Data Mapping

This section gives you information about the Data Mapping process.

Note that: this functionality is only available with the ELFINI Structural Analysis (EST)product

.

What is Data Mapping?How are Data Mapping files filled?

Which algorithm is used for Data Mapping?

In which functionalities is the Data Mapping process available?

What is Data Mapping?

Data Mapping is a functionality allowing load import described by a scalar field from a text (.txt) or

an Excel (.xls) file. This file must respect a pre-defined format.

You can re-use data that are external data (experimental data or data coming from in-house codes

or procedures).

The imported values will be interpolated at the center of gravity of each element.You can also integrate user loading knowledge and processes into this version.

The selected external data file will be either a .txtfile (columns separated using the Tabkey) or a

.xlsfile. This file must respect a pre-defined format.

Data Mapping is useful when you want to re-use a load field created without CATIA or with a former

version of CATIA.

How are Data Mapping files filled?

Data Mapping files are text files (.txt) or Excel files (.xls) that must respect a pre-defined format.

For pressure, line force density, surface force density, body load, temperature and shell

property functionalities, the data mapping file must respect the following format:

Four columns.

Each cell must contain a numerical value.

The first threecolumns allow you to spec ify X, Yand Zpoint coordinates in the

global axis.

Unit symbol written between parentheses must be specified.

The last one allows you to specify the amplification coefficient.

No unit symbol must be specified for the last column (the amplification coefficient is

not assigned to a dimensional value).

Example of data mapping for a pressure:
http://-/?-http://-/?-


2/3



For imported force and imported moment functionalities, the data mapping files must respect

the following format:

Six columns.

Each cell must contain a numerical value.

The first three columns allow you to specify X, Yand Zpoint coordinates in the

global axis.


The last three columns allow you to specify FX, FYand FZforce coordinates in the

global axis in case of imported forces or MX, MYand MZmoment coordinates in

case of imported moment.


Example of data mapping for an imported force:

Which algorithm is used for Data Mapping?

There are three steps in this algorithm:

1. Checking that the center of gravity of each entity of the recipient mesh is inside the axis-


3/3



aligned bounding box of the source mesh (automatic tolerance: 1.0 e-3m).

An entity can be an element, an edge or a face.

For example, in the case of:

a temperature field, entity means element,

a line force density, entity means edge,

a pressure, entity means face.

2. Matching the center of gravity of each entity of the recipient mesh with some of the nearestpoints of the scalar field.

These points are processed as if they were the vertices of a finite element.

The matching is done at the centers of gravity of the recipient mesh entities,

and not at their nodes, because it is the resulting loads location.

3. Interpolating the scalar field of the source mesh on the recipient mesh using the nodal

functions of the finite element.

In which functionalities is the Data Mapping process

available?

The Data Mapping process is available in the following functionalities:

pressure

line force density

surface force density

volume force density

temperature field

shell property
http://catiadoc.free.fr/online/estug_C2/estugbt0807.htmhttp://catiadoc.free.fr/online/estug_C2/estugbt0310.htmhttp://catiadoc.free.fr/online/estug_C2/estugbt0306.htmhttp://catiadoc.free.fr/online/estug_C2/estugbt0305.htmhttp://catiadoc.free.fr/online/estug_C2/estugbt0304.htmhttp://catiadoc.free.fr/online/estug_C2/estugbt0301.htm

Documents

Data Mapping.pdf