Solver Export Options

Access solver export options by clicking Select Options, next to Solver Options in the Export - FE Models tab.

OptiStruct and Nastran

When exporting a model, HyperMesh always tries to use the greatest precision when writing real numbers in small format. The following options in the Solver Options dialog will allow you to control precision and accuracy in the model.

Remove ‘E’ from real values: OptiStruct and Nastran solvers do not require explicitly writing an E to recognize the proper exponent of a real number, and removing the E allows one more digit of precision to be included. For example, -1.12E-7 becomes -1.123-7.
Zero tolerance: With this option, any real numbers in the model whose absolute value is less than specified here will be written out as zero. For example, if Zero tolerance = 1.0E-12, it means all real values from -1.0E-12 to 1.0E-12 will be exported as 0.0.

Non-structural mass [NSM1, NSML1] must be referenced in case control for it to be applied in the model. In order to make this process easier, the following option in the Solver Options dialog has been added:

Auto-organize NSM: When turned on, this option automatically collects all non-structural mass entities [NSM1, NSML1] into a NSMADD loadcollector. This loadcollector is then automatically referenced in the NSM GLOBAL_CASE_CONTROL control card. As long as Auto-organize NSM is checked on, it will update the NSMADD loadcollector on every export and if you delete all NSM* cards, this option will delete NSMADD and case control reference along with it.

The default behavior in HyperMesh when exporting RBE3 weight factors is to maintain all values defined by you, even if they have a value of 0.0. This behavior can be modified with the following option:

Auto adjust RBE3 0.0 weight factor: When turned on, HyperMesh will change any 0.0 weight factors on RBE3 elements to the specified small value. This adjustment is done in the exported solver deck only, and the original model values in the current HyperMesh session will not be modified.

Others:

Compress Nodes/Element Sets: When turned on, all node sets and element sets in the model are exported with the THRU statement.
Free Format Export: (OptiStruct only): When turned on, the model will be exported in free format (comma separated format). This option supersedes other export templates like standard format and long format.

Permas

While rigid and rbe3 elements use the same ID pool in HyperMesh, equations and groups have separate ones. During creation, it is possible to use this situation to create duplicate IDs for MPCs as well. To resolve this, during export a solver option is available in the Export tab to renumber MPCs if duplicate IDs are present (Renumber MPCs if IDs are duplicated). This option will check for the highest rigid/rbe3 ID and renumber equation entities accordingly. Groups are not included in the renumbering functionality as contact IDs would be affected by renumbering.

The Export to gzip compressed file (.gz) option allows you to export files to .gz file format (gzip), which is Permas compressing tool. This format is directly read into their solver.

Abaqus

Export Entities With Quotes: Abaqus does not support special characters or staring with numbers in entity names. In order to retain entity names during export, quotes can be added to entity names. By default, entities with quotes are not exported in the solver deck. Select this checkbox to export entities with quotes in the solver deck.; This option is only supported for the following entities: Components, Properties, Materials, Sets, and Groups.
Export *NMAP keyword: Exports the solver deck with the *NMAP keyword (default). Clearing this checkbox exports a flat solver deck without the *NMAP keyword.
Auto adjust RBE3 0.0 weight factor: When enabled, HyperMesh changes any 0.0 weight factor on RBE3 elements to the specified small value. This adjustment is only done in the exported solver deck. The original model values in the current HyperMesh session will not be modified.

Additional export options specific to Abaqus are available under Export options.

Export Id's

Each entity is assigned to an ID when it is imported into HyperMesh. In cases of Abaqus Interface, when you export the solver deck from HyperMesh, entity IDs will not be retained. By activating the Export ID’s option, entities will be assigned a range of IDs that are specific to each entity during export. Since more than one entity may exist, an alphabetic prefix is assigned to each entity in order to avoid a duplicate ID conflict.

For example, bumper-system will always have Part ID 2000000-2100000 across all carlines. Therefore, an engineer will have to isolate PIDs 2000000-2100000, if he wants to examine the bumper-system. This is essential in pre- and post-processing. Exporting the solver deck with IDs, will retain the prefix, ID and entity name.

Example for a surface entity with ID’s in solver deck (HM group): *SURFACE, NAME = <Prefix><ID>;<name_of_surface>
Example for a surface entity without ID’s in solver deck (HM group): *SURFACE, NAME = <name_of_surface>

When the Export Id's option is activated, you are able to edit the prefix for each entity by clicking Default Prefix. The Default Prefix dialog is arranged by HyperMesh entities. Each tab contains the entity which will be supported when exporting the ID’s into solver decks. You can change the prefix based on your own personal requirements. The Restore Default Prefix button allows you to reset the prefix for each entity. Instead of using letters from the English alphabet, you can also use the “-“ symbol to filter the entities when exporting the ID’s.

Table 1. Entities and Corresponding Prefixes. List of entities and their corresponding prefixes that are displayed by default in the Default Prefix dialog.
Entity	Prefix
Curve
Amplitude	XY
Group
SURFACE_ELEMENT, SURFACE_NODE, SURFACE_COMBINE_CROP, CUTTING SURFACE, ANALYTICAL_RIGID_SURFACE, TIE, CAVITY_DEFINITION, COUPLING, SHELL_SOLID_COUPLING, INTEGRATED_OUTPUT_SECTION	G
Material
CONNECTOR_BEHAVIOR, GASKET_BEHAVIOR	M
ABAQUS_MATERIAL, GENERIC_MATERIAL	-
Property
BEAM_SECTION, COHESIVE_SECTION, CONNECTOR_SECTION, SURFACE_SECTION, GASKET_SECTION, SHELL_SECTION, SOLID_SECTION	P
JOIN_PROPERTY, SPRING_PROPERTY, SECTION_CONTROL, SURFACE_INTERACTION, FASTENER_PROPERTY,DASHPOT_PROP,GAP_PROP	A
RIGID_BODY, MEMBRANESECTION, SURFACE_SMOOTHING, MASS, ROTARY_INERTIA, FLUIDPROPERTY, FRICTION, NONSTRUCTURAL_MASS, PHYSICAL_CONSTANTS, ELEMENT_PROPERTIES	-
Set
SET	S

LS-DYNA

Remove Numerical Suffix from Duplicate Titles: Removes numerical suffixes from duplicate titles.
Activate Transformations after Export Operation: Activates transformations after export operation.
Repeat Keyword Titles: Repeats keyword titles for each instance of the card.
Auto create property for COMPS with TETRA4/PENTA6/HEX8 elements: Creates properties for components that have TETRA4, PENTA6, and HEX8 elements.
Remove include file reference based on export status: Removes include file reference based on export status.

PAM-CRASH 2G

Activate Transformations after Export Operation: Activates transformations after export operation.