Import of SPOINT bulk data entries

Nastran uses the SPOINT bulk data entry to define scalar points. Scalar points have a single degree-of-freedom. In Nastran:

• You can explicitly define a scalar point by creating an SPOINT entry in the bulk data section of your input file.

• You can implicitly define a scalar point by referencing the ID of a scalar point on a CDAMP1/2/3/4, CMASS1/2/3/4, or CELAS1/2/3/4 element entry. If you specify a scalar point on one of these entries, you do not need to include an SPOINT entry in the bulk data section of your input file.

Pre/Post allows you to import implicitly defined SPOINT (scalar point) bulk data entries. If your .dat file contains CDAMP1/2/3/4, CMASS1/2/3/4, or CELAS1/2/3/4 element that reference an SPOINT, the software imports that SPOINT as a node, places it's location at the origin, and fixes DOF 23456. The software:

• Gives the new node (GRID) the same ID as the original SPOINT

• Modifies any element definitions that originally referenced the SPOINT to reference the new node instead.

Note:

Pre/Post imports SPOINT entries that are referenced by DMIG entries (and not any other element type) as true scalar points.

If you later export this model back to Nastran, the software writes this node out using a Nastran GRID bulk data entry that is fixed in DOF 23456.

For more information on SPOINTs, see SPOINT in the Simcenter Nastran Quick Reference Guide and Understanding Scalar Points in the Simcenter Nastran User's Guide.

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

Importing and exporting table extrapolation options

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

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Command reference

Pre/Post video examples

Bulk Entry Descriptions

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Import of SPOINT bulk data entries, Simcenter 3D 2021.1 Series

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