Controlling the organization of an exported input file

When you use export a Nastran input file, you can control how the data in that exported file is organized. You can specify a pattern file for the software to use as a guide for organizing data during the export operation. A pattern file is a file that you have previously exported and might have rearranged to your preference.

For example, you can use a pattern file to establish the following:

• The order in which you want the software to export entities, such as parameters. For example, you can create a pattern file in which the Nastran PARAM cards always appear at the end of the bulk data section of the input file.

• How included files are used during the export. For example, if you always want to export the GRID bulk data entries that define nodes in a separate file, you can create a pattern file in which the nodal data is stored in a separate grid.dat file and simply referenced in the pattern file with an INCLUDE statement.

• The format to use for bulk data entry fields.

After you create a pattern file, you can use options in the Round Trip Parameters modeling object dialog box to specify the following:

• The pattern file that you want to scan for information and organizational structure.

• Whether you want to export data using the same included files as the pattern file.

When you later export a solution that references this Round Trip Parameters modeling object that you specify on the General tab in the Solution dialog box, the software uses the pattern file to configure the data in the exported file.

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the displayed part and the work parta Simcenter Nastran or MSC Nastran solution active
Command Finder	Modeling Objects

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

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Controlling the organization of an exported input file, Simcenter 3D 2021.1 Series

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