Previewing Nastran solver syntax

Use the Solver Syntax Preview command to preview how a selected entity will be written out to your Nastran input file. The software displays the syntax preview in an Information window, as shown below:

Note:

By default, the software only previews the first 5000 lines of syntax for performance reasons. You can use a new Maximum Number of Output Lines for a Solver Syntax Preview customer default to increase or decrease that limit.

You can use the Solver Syntax Preview command to help validate that you have set up your model correctly prior to a solve.

Formatting options and solver version affect the previewed information

The output produced by the Solver Syntax Preview command depends on:

• The specified solver version as defined by the UGII_NX_NASTRAN_VERSION or UGII_MSC_NASTRAN_VERSION environment variables. The software only previews solver syntax that is supported in the specified Nastran version.

• The specified input file formatting options that you specify in either the Export Simulation dialog box (when a FEM file is active) or in the Advanced Solver Options dialog box (when a Simulation file is active).Note: The software writes out the card description information for either the first occurrence of each bulk data entry or command or for all occurrences of the bulk data entries and commands. If you select None from the Card Description list, the software still writes out the card description information for the first occurrence of each entry or command.

Previewing solver syntax from the FEM file

In a FEM file, you can use Solver Syntax Preview to preview the Nastran syntax for the selected entities in the Simulation Navigator and several dialog boxes.

When a FEM file is active, you can use the Solver Syntax Preview command to preview the syntax for the following types of entities in the Simulation Navigator:

• Meshes

• Elements

• Coordinate Systems

• Groups

To preview the syntax for nodes, use the Node/Element Information command to display information on selected elements. This information includes a list of the nodes connected to each element.

Note:

You must select the General Listing format option.

To preview the syntax for physical properties, materials, and modeling objects, use the Solver Syntax Preview option in the Physical Properties Table Manager, Manage Materials, and Modeling Objects Manager dialog boxes.

Previewing solver syntax from the Simulation file

When a Simulation file is active, within the active solution or subcase, you can use the Solver Syntax Preview command to preview the syntax for the following types of entities in the Simulation Navigator:

• Loads

• Constraints

• Simulation objects

• Simulation regions

• Groups

Note:

For performance reasons, the ID values that the Solver Syntax Preview command previews may be different from the ID values that the software generates when you export or solve the input file.

Where do I find it?

Solver Syntax Preview command

Application	Pre/Post
Prerequisite	An active FEM or Simulation file with Simcenter Nastran or MSC Nastran as the specified solver
Simulation Navigator	Right-click the appropriate entity→Solver Syntax Preview

Maximum Number of Output Lines for a Solver Syntax Preview customer default

Menu	File→Utilities→Customer Defaults
Location in dialog box	Simulation→Pre/Post→General→Environment tab

Learn more

Simcenter Nastran and MSC Nastran environments

Controlling the Nastran iterative solver

Allocating DBset size

Modeling thermal strain in a Nastran analysis

Printing bulk data in your results file

Customizing a Nastran input file with user defined text

Look up more details

Simcenter Nastran and MSC Nastran boundary conditions

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Previewing Nastran solver syntax, Simcenter 3D 2021.1 Series

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