Importing and exporting table extrapolation options

Pre/Post honors the extrapolation options that you specify for data in a table field. This software imports and exports the EXTRAP field for the following Nastran table bulk data entries:

• TABLEM1, TABLEM2, TABLEM3

• TABLED1, TABLED2, TABLED3

• TABLEST

In Pre/Post, you can use the options in the Values Outside Table list in the Table Field dialog box to control whether Nastran extrapolates the starting and ending data points.

• If you select Undefined or Extrapolate, Simcenter Nastran extrapolates the two starting data points to obtain the table look-up when x < xi, and extrapolates the two ending data points to obtain the table look-up when x > xi. These options set the EXTRAP field to EXTRAP=0 when you export or solver your input file.

• If you select Constant, Simcenter Nastran uses the value of the table field at the starting data point for the table look-up when x < xi, and use the value of the table field at the ending data point for the table look-up when x > xi. This option sets the EXTRAP field to EXTRAP=0 when you export or solver your input file.

Prior to release 11, Pre/Post did not import or export the EXTRAP field.

Note:

If you solve an input file that contains the EXTRAP field in Simcenter 3D 11 or later releases, the results may differ from a solve that you run for the same input file in NX 9 or NX 10. This difference occurs because Simcenter Nastran extrapolates the data points by default while Pre/Post sets the data points to a constant value by default.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM or Simulation file as the work part and displayed partSimcenter Nastran or Simcenter 3D Multiphysics as the specified solver
Menu	File→Import→Simulation****File→Export→Simulation

Learn more

Extended mesh validity checking during import (Nastran and ANSYS)

Importing RBE2 and RBE3 elements

Understanding imported Nastran constraints

Understanding the import of Nastran SETs

Import of SPOINT bulk data entries

Exporting and importing CBEAM and CBAR elements with the OFFT field

Importing physical property data as element-associated data

Managing element conflicts when appending a Nastran input file

Look up more details

Importing Nastran data

Import for connection elements

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

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Importing and exporting table extrapolation options, Simcenter 3D 2021.1 Series

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