Export Simulation/Advanced Solver Options dialog box—Nastran

Load Advanced Solver Options from Solution	If you previously clicked Edit Advanced Solver Options in the Solve dialog box to specify export options for a solution, you can click this button to load those settings in the Export Simulation dialog box.

General tab

Output File Units
Units	Specifies the units in which the software writes the data to the output file.
Specify Temperature Unit	Indicates whether to specify a separate system of units for the temperatures in your model.If you select this check box, you can select the unit from the adjacent list.
Output File Name
File Name	Sets the name of the output file.
Directory	Displays the directory in which to create the output file.

Export Options tab

Assemblies
Output File Structure	Controls how the software writes out part hierarchy data in assembly FEM files.Select Ignore Part Hierarchy to write the data to the input file with no special handling for the component file data.Select Retain Part Hierarchy Using Include Files to use Nastran INCLUDE file statements to write each component file (.fem, .afem, and .sim) as a separate Nastran input file. Select Retain Part Hierarchy in a Single Organized Output File to write out a single Nastran input file with all bulk data entries that pertain to a particular component grouped together. The software inserts a commented header that identifies the associated component before each group. The order of each component group loosely follows the tree order of the assembly FEM hierarchy.
Material Data Output	Available Output File Structure is set to Retain Part Hierarchy Using Include Files or Retain Part Hierarchy in a Single Organized Output File.Controls how the software writes out library and local material data from assembly FEM files.Select Default to write out all material bulk data entries as they occur in the assembly FEM to the input file. If the same material is used by multiple component FEMs in the assembly FEM, the software writes the material bulk data entries multiple times.Select Compacted to write out the material bulk data entries in a compact format. If the same material is used by multiple component FEMs in the assembly FEM, the software writes identical material bulk data entries only once in the input file of the closest common parent component. This process reduces the overall number of materials exported.
Model Orientation
Use Coordinate System	Specifies the coordinate system in which you want to export the file.You can use this option to export the model in a different coordinate system than the one used in the original Simulation file. This allows you to re-orient the model on export to a specified coordinate system.If you select a different coordinate system on export, the software replaces the basic coordinate system references in your Nastran input file with a Cartesian coordinate system that is equivalent to the one you select. The software updates all entities in your model, such as nodes, loads, or material orientation vectors, that referred to the basic coordinate system, to refer to the new coordinate system. This changes the orientation of the model.
Subset Export
Subset Export	Lets you control whether you export your entire model or just portions of it.Full modelExport your entire model.Visible elementsExport only the elements that are currently displayed in your model.Selected groupsExport only the contents of the selected groups.If you select multiple groups, the software exports all the entities in the selected groups. In addition to exporting the contents of a selected group, the software also exports:Any loads and boundary conditions associated with the nodes and elements in the group.All nodes associated with the elements in that group, even if the nodes themselves are not members of the group.Export nodes connected only to inactive elements Available when Full model is selected.Exports nodes connected only to inactive meshes. Meshes become inactive when:Meshes were created in a solver environment, for example, ANSYS, different from the active solver environment, for example, Simcenter Nastran.The mesh is invalid in the active environment.Note: Typically, you clear the Export nodes connected only to inactive elements check box only to increase the export performance.
Output Options
Nastran Statement Section File Management Section Executive Control Section Case Control Section	Exports different sections of the Nastran input file.
Export all groups to node and element sets	Writes out any groups of nodes or elements in your FEM file as Nastran sets, using the SET case control command.
Export all selection recipes to node and element sets	Writes out any selection recipes that select nodes or elements in your FEM file as Nastran sets, using the SET case control command.
Bulk Data Section	Writes out the data for the bulk data section of the Nastran input file.If you select this check box, you can include or exclude specific types of bulk data entries or specific bulk data entries.
Filter Method	Available when the Bulk Data Section check box is selected.Specifies the bulk data entries that the software writes out to the Nastran input file.By card familySelectively export bulk data entries according to the type of entry.For example, you can clear the Materials check box if you do not want to write out any bulk data entries that define materials.By card nameSelectively export bulk data entries by their name.Use the Cards to export and Cards to exclude lists to select specific bulk data entries to either write out or exclude from being written out to the Nastran input file.

Formatting Options tab

General
System Cells Format	Specifies the format used for writing system cells to the NASTRAN statement.NameWrites cells in the following format:NASTRAN cellname1=expression1, ..., cellnamen=expressionnWhere cellname is the name of the system cell.NumberWrites cells in the following format:NASTRAN SYSTEM(i)=expression1, ..., SYSTEM(n)=expressionnWhere i is the system cell number.
File Path Format	Controls how the software writes out any file paths to the Nastran input file, including the paths for files that you reference with ASSIGN and INCLUDE statements.Select Absolute to have the software fully write out the file path using path separators that are native to your operating system.Select Relative, Using Native Separators to have the software write out file paths relative to the location of the solver file using path separators that are native to your operating system.Select Relative, Using Windows Separators to have the software write out file paths relative to the location of the solver file using backward slash ("") path separators.Select Relative, Using Linux Separators to have the software write out file paths relative to the location of the solver file using forward slash ("/") path separators.
Do Not Write Comments	Controls whether the software writes out any comments to the Nastran input file.
Bulk Data
You can use the Field Format options on the Simulation→Pre/Post→Nastran→Formatting Options page of the Customer Defaults dialog box to control the default value for the Format Type and Field Length options.
Performance	Controls the speed at which data is exported to the Nastran input file.Select the Performance check box to have the software export the model using settings that optimize the export performance. When you select the Performance check box:The export process is faster.Performance is maximized by writing out Nastran real data using narrow field entries and Nastran exponentiation format. GRID, MPC, CORD2C/CORD2R/CORD2S, and RBE3 bulk data entries are always exported in large field entries (16 characters) rather than in narrow fields, to ensure accuracy. Nodes are not sorted. For example, GRID with ID 1 may be written after GRID with ID 100 in the Nastran input file. Clear the Performance check box to have the software export the model using settings that do not maximize the export performance.
Format Type	Available when the Performance check box is cleared.Specifies how the software formats the data fields when it writes out the Nastran input file.Fixed Field LengthAligns the data in columns of a specific width.**Free (Comma-Separated)**Separates the data fields by commas.Exporting Nastran data in the free-field format is helpful when you want to write the data to a spreadsheet or CSV file. You can then use the data for further analysis, graphing, or report preparation.
Field Length	Available when the Performance check box is cleared.Specifies the field length format that the software uses to write out the data fields.Either Small or LargeWrites a line of data in small field format when there is no loss of accuracy from writing it in large field format.SmallDivides a single line of data into 10 fields that can contain eight characters each.LargeExpands a single line of input into two lines.The first and last fields on each line are eight columns wide, while the intermediate fields are sixteen columns wide. The large field format is useful when you need greater numerical accuracy.
Exponential Format	Available when the Performance check box is cleared.Specifies the exponential notation used to write real values to the input file.NASTRANUses the Nastran contracted notation and writes out the real value as 1.+6. This increases the number of significant digits in the input file.StandardUses standard exponential notation.For example, the number 1,000,000.0 is expressed as 1.E6
Real Data Precision	Available when the Performance check box is cleared.Specifies the number of significant figures for real values written to the input file.MaximumMaximizes the precision of the data in this software.StandardUses fewer significant figures but is easier to read.
Card Description	Available when the Performance check box is cleared.Specifies how to handle the Nastran card field descriptors.The Nastran card field descriptors found in the Nastran Quick Reference Guide (for example MID1, NSM,TS/T) can be written as comment lines to the input file. All CardsPrecedes all cards with the field descriptors.First OccurrencePrecedes only the first occurrence of a card in the input file with field descriptors.NoneWrites out no field descriptors to the input file.
Apply Real Data Filter to All Real Values	Writes the data (such as nodal coordinates or the magnitude of loads and boundary conditions) as 0.0 if the absolute value of the data falls between (-1.0) * (the specified Real Data Filter Value value) and (1.0 )*(the specified Real Data Filter Value value) inclusively.If you select this check box and the absolute value of the data falls outside that range, the software writes the data out as-is.
Real Data Filter Value	Available when the Apply Real Data Filter to All Real Values check box is selected.Sets the value to use when writing out real data.
Write DOF Sets Using Alternate Format	Exports DOF sets using the appropriate alternate format bulk data entries.If you select this check box, the software writes out any DOF sets in their alternate format. For example, the software writes out analysis degree-of-freedom sets as ASET1 bulk data entries rather than ASET entries.For more information, see Exporting DOF Sets in the alternate format.
Use THRU Format	Uses the THRU format for applicable bulk data entries during the export.For more information, see Using the THRU format to export bulk data entries.
Entity ID Offsets
Coordinate System ID OffsetGrid ID OffsetElement ID OffsetMaterial ID OffsetPhysical Property ID Offset****Table ID Offset	Sets the label (IDs) for the entities you export.You can specify an offset to use for the labels for selected entities. You can define offsets for the IDs of several different types of entities, such as coordinate systems, grids (nodes), and physical property tables.

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Export Simulation/Advanced Solver Options dialog box—Nastran, Simcenter 3D 2021.1 Series

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