2.5. PREP7 Commands

These commands are used to create and set up the model. The commands are grouped by functionality.

Table 2.24: Database

These PREP7 commands are used to read model data into the database, list out the database, and control the numbering of entities in the database.
AFLIST	Lists the current data in the database.
CDREAD	Reads a file of solid model and database information into the database.
CDWRITE	Writes geometry and load database items to a file.
CDOPT	Specifies format to be used for archiving geometry.
CECHECK	Check constraint equations and couplings for rigid body motions.
CHECK	Checks current database items for completeness.
CNCHECK	Provides and/or adjusts the initial status of contact pairs.
FC	Provides failure criteria information and activates a data table to input temperature-dependent stress and strain limits.
FCCHECK	Checks both the strain and stress input criteria for all materials.
FCDELE	Deletes previously defined failure criterion data for the given material.
FCLIST	To list what the failure criteria is that you have input.
IGESOUT	Writes solid model data to a file in IGES Version 5.1 format.
MFIMPORT	Imports a new field into a current ANSYS Multi-field solver analysis.
NOOFFSET	Prevents the CDREAD command from offsetting specified data items.
NUMCMP	Compresses the numbering of defined items.
NUMMRG	Merges coincident or equivalently defined items.
NUMOFF	Adds a number offset to defined items.
NUMSTR	Establishes starting numbers for automatically numbered items.
/PREP7	Enters the model creation preprocessor.

Table 2.25: Element Type

These PREP7 commands define the type of elements to be used in the model.
DOF	Adds degrees of freedom to the current degree-of-freedom set.
ELBOW	Specifies degrees of freedom to be coupled for end release and applies section constraints to elbow elements.
ET	Defines a local element type from the element library.
ETCHG	Changes element types to their corresponding types.
ETCONTROL	Controls the element technologies used in element formulation (for applicable elements).
ETDELE	Deletes element types.
ETLIST	Lists currently defined element types.
KEYOPT	Sets element key options.
NSVR	Defines the number of variables for user-programmable element options.

Table 2.26: Real Constants

These PREP7 commands define the model real constants.
R	Defines the element real constants.
RDELE	Deletes real constant sets.
RLIST	Lists the real constant sets.
RMODIF	Modifies real constant sets.
RMORE	Adds real constants to a set.
SETFGAP	Updates real constant table for squeeze film elements.

Table 2.27: Materials

These PREP7 commands are used to define the linear material properties.
EMUNIT	Specifies the system of units for magnetic field problems.
MP	Defines a linear material property.
MPAMOD	Modifies temperature-dependent coefficients of thermal expansion.
MPCHG	Changes the material number attribute of an element.
MPCOPY	Copies material model data from one material reference number to another.
MPDATA	Defines property data to be associated with the temperature table.
MPDELE	Deletes linear material properties.
MPDRES	Reassembles existing material data with the temperature table.
/MPLIB	Sets the default material library read and write paths.
MPLIST	Lists linear material properties.
MPPLOT	Plots linear material properties as a function of temperature.
MPREAD	Reads a file containing material properties.
MPTEMP	Defines a temperature table for material properties.
MPTGEN	Adds temperatures to the temperature table by generation.
MPTRES	Restores a temperature table previously defined.
MPWRITE	Writes linear material properties in the database to a file (if the Lib option is not specified) or writes both linear and nonlinear material properties (if Lib is specified) from the database to a file.
TBFT	Performs curve-fitting operations on materials.
UIMP	Defines constant material properties (GUI).

Table 2.28: Material Data Tables

These PREP7 commands create and modify the material data tables (that is, to specify and define material models).
TB	Activates a material data table.
TBCOPY	Copies a data table from one material to another.
TBDATA	Defines data for the material data table.
TBDELE	Deletes previously defined material data tables.
TBEO	Sets special options or parameters for material data tables.
TBFIELD	Defines values of field variables for the material data tables.
TBIN	Sets parameters used for interpolation of the material data tables.
TBLIST	Lists the material data tables.
TBMODIF	Modifies data for the material data table (GUI).
TBPLOT	Displays the material data table.
TBPT	Defines a point on a stress-strain or B-H curve.
TBTEMP	Defines a temperature for the material data table.

Table 2.29: Primitives

These PREP7 commands are used to create primitive shapes for modeling.
BLC4	Creates a rectangular area or block volume by corner points.
BLC5	Creates a rectangular area or block volume by center and corner points.
BLOCK	Creates a block volume based on working plane coordinates.
CON4	Creates a conical volume anywhere on the working plane.
CONE	Creates a conical volume centered about the working plane origin.
CYL4	Creates a circular area or cylindrical volume anywhere on the working plane.
CYL5	Creates a circular area or cylindrical volume by end points.
CYLIND	Creates a cylindrical volume centered about the working plane origin.
PCIRC	Creates a circular area centered about the working plane origin.
POLY	Creates a polygonal area based on working plane coordinate pairs.
PRI2	Creates a polygonal area or a prism volume by vertices (GUI).
PRISM	Creates a prism volume based on working plane coordinate pairs.
PTXY	Defines coordinate pairs for use in polygons and prisms.
RECTNG	Creates a rectangular area anywhere on the working plane.
RPOLY	Creates a regular polygonal area centered about the working plane origin.
RPR4	Creates a regular polygonal area or prism volume anywhere on the working plane.
RPRISM	Creates a regular prism volume centered about the working plane origin.
SPH4	Creates a spherical volume anywhere on the working plane.
SPH5	Creates a spherical volume by diameter end points.
SPHERE	Creates a spherical volume centered about the working plane origin.
TORUS	Creates a toroidal volume.

Table 2.30: Keypoints

These PREP7 commands are used to create, modify, list, etc., keypoints.
GSUM	Calculates and prints geometry items.
K	Defines a keypoint.
KBETW	Creates a keypoint between two existing keypoints.
KCENTER	Creates a keypoint at the center of a circular arc defined by three locations.
KDELE	Deletes unmeshed keypoints.
KDIST	Calculates and lists the distance between two keypoints.
KFILL	Generates keypoints between two keypoints.
KGEN	Generates additional keypoints from a pattern of keypoints.
KL	Generates a keypoint at a specified location on an existing line.
KLIST	Lists the defined keypoints or hard points.
KMODIF	Modifies an existing keypoint.
KMOVE	Calculates and moves a keypoint to an intersection.
KNODE	Defines a keypoint at an existing node location.
KPLOT	Displays the selected keypoints.
KPSCALE	Generates a scaled set of (meshed) keypoints from a pattern of keypoints.
KSCALE	Generates a scaled pattern of keypoints from a given keypoint pattern.
KSUM	Calculates and prints geometry statistics of the selected keypoints.
KSYMM	Generates a reflected set of keypoints.
KTRAN	Transfers a pattern of keypoints to another coordinate system.
SOURCE	Defines a default location for undefined nodes or keypoints.

Table 2.31: Hard Points

These PREP7 commands are used to create, modify, list, etc., hard points.
HPTCREATE	Defines a hard point.
HPTDELETE	Deletes selected hard points.

Table 2.32: Lines

These PREP7 commands are used to create, modify, list, etc., lines.
BSPLIN	Generates a single line from a spline fit to a series of keypoints.
CIRCLE	Generates circular arc lines.
GSUM	Calculates and prints geometry items.
L	Defines a line between two keypoints.
L2ANG	Generates a line at an angle with two existing lines.
L2TAN	Generates a line tangent to two lines.
LANG	Generates a straight line at an angle with a line.
LARC	Defines a circular arc.
LAREA	Generates the shortest line between two keypoints on an area.
LCOMB	Combines adjacent lines into one line.
LDELE	Deletes unmeshed lines.
LDIV	Divides a single line into two or more lines.
LDRAG	Generates lines by sweeping a keypoint pattern along path.
LEXTND	Extends a line at one end by using its slope.
LFILLT	Generates a fillet line between two intersecting lines.
LGEN	Generates additional lines from a pattern of lines.
LLIST	Lists the defined lines.
LPLOT	Displays the selected lines.
LREVERSE	Reverses the normal of a line, regardless of its connectivity or mesh status.
LROTAT	Generates circular lines by rotating a keypoint pattern about an axis.
LSSCALE	Generates a scaled set of lines from a pattern of lines.
LSTR	Defines a straight line irrespective of the active coordinate system.
LSUM	Calculates and prints geometry statistics of the selected lines.
LSYMM	Generates lines from a line pattern by symmetry reflection.
LTAN	Generates a line at the end of, and tangent to, an existing line.
LTRAN	Transfers a pattern of lines to another coordinate system.
SPLINE	Generates a segmented spline through a series of keypoints.
SSLN	Selects and displays small lines in the model.

Table 2.33: Areas

These PREP7 commands are used to create, modify, list, etc., areas.
A	Defines an area by connecting keypoints.
AATT	Associates element attributes with the selected, unmeshed areas.
ADELE	Deletes unmeshed areas.
ADGL	Lists keypoints of an area that lie on a parametric degeneracy.
ADRAG	Generates areas by dragging a line pattern along a path.
AFILLT	Generates a fillet at the intersection of two areas.
AGEN	Generates additional areas from a pattern of areas.
AL	Generates an area bounded by previously defined lines.
ALIST	Lists the defined areas.
ANORM	Reorients area normals.
AOFFST	Generates an area, offset from a given area.
APLOT	Displays the selected areas.
AREVERSE	Reverses the normal of an area, regardless of its connectivity or mesh status.
AROTAT	Generates cylindrical areas by rotating a line pattern about an axis.
ARSCALE	Generates a scaled set of areas from a pattern of areas.
ARSYM	Generates areas from an area pattern by symmetry reflection.
ASKIN	Generates an area by "skinning" a surface through guiding lines.
ASUB	Generates an area using the shape of an existing area.
ASUM	Calculates and prints geometry statistics of the selected areas.
ATRAN	Transfers a pattern of areas to another coordinate system.
GSUM	Calculates and prints geometry items.
SPLOT	Displays the selected areas and a faceted view of their underlying surfaces

Table 2.34: Volumes

These PREP7 commands are used to create, modify, list, etc., volumes.
EXTOPT	Controls options relating to the generation of volume elements from area elements.
GSUM	Calculates and prints geometry items.
V	Defines a volume through keypoints.
VA	Generates a volume bounded by existing areas.
VDELE	Deletes unmeshed volumes.
VDGL	Lists keypoints of a volume that lie on a parametric degeneracy.
VDRAG	Generates volumes by dragging an area pattern along a path.
VEXT	Generates additional volumes by extruding areas.
VGEN	Generates additional volumes from a pattern of volumes.
VLIST	Lists the defined volumes.
VLSCALE	Generates a scaled set of volumes from a pattern of volumes.
VOFFST	Generates a volume, offset from a given area.
VPLOT	Displays the selected volumes.
VROTAT	Generates cylindrical volumes by rotating an area pattern about an axis.
VSUM	Calculates and prints geometry statistics of the selected volumes.
VSYMM	Generates volumes from a volume pattern by symmetry reflection.
VTRAN	Transfers a pattern of volumes to another coordinate system.

Table 2.35: Booleans

These PREP7 commands are used to perform Boolean operations on solid model entities.
AADD	Adds separate areas to create a single area.
AGLUE	Generates new areas by "gluing" areas.
AINA	Finds the intersection of areas.
AINP	Finds the pairwise intersection of areas.
AINV	Finds the intersection of an area with a volume.
AOVLAP	Overlaps areas.
APTN	Partitions areas.
ASBA	Subtracts areas from areas.
ASBL	Subtracts lines from areas.
ASBV	Subtracts volumes from areas.
ASBW	Subtracts the intersection of the working plane from areas (divides areas).
BOPTN	Specifies Boolean operation options.
BTOL	Specifies the Boolean operation tolerances.
LCSL	Divides intersecting lines at their point(s) of intersection.
LGLUE	Generates new lines by "gluing" lines.
LINA	Finds the intersection of a line with an area.
LINL	Finds the common intersection of lines.
LINP	Finds the pairwise intersection of lines.
LINV	Finds the intersection of a line with a volume.
LOVLAP	Overlaps lines.
LPTN	Partitions lines.
LSBA	Subtracts areas from lines.
LSBL	Subtracts lines from lines.
LSBV	Subtracts volumes from lines.
LSBW	Subtracts the intersection of the working plane from lines (divides lines).
VADD	Adds separate volumes to create a single volume.
VGLUE	Generates new volumes by "gluing" volumes.
VINP	Finds the pairwise intersection of volumes.
VINV	Finds the intersection of volumes.
VOVLAP	Overlaps volumes.
VPTN	Partitions volumes.
VSBA	Subtracts areas from volumes.
VSBV	Subtracts volumes from volumes.
VSBW	Subtracts intersection of the working plane from volumes (divides volumes).

Table 2.36: Meshing

These PREP7 commands are used to mesh solid models with nodes and elements.
ACCAT	Concatenates multiple areas in preparation for mapped meshing.
ACLEAR	Deletes nodes and area elements associated with selected areas.
AESIZE	Specifies the element size to be meshed onto areas.
AMAP	Generates a 2-D mapped mesh based on specified area corners.
AMESH	Generates nodes and area elements within areas.
AREFINE	Refines the mesh around specified areas.
CHKMSH	Checks area and volume entities for previous meshes.
CLRMSHLN	Clears meshed entities.
CPCYC	Couples the two side faces of a cyclically symmetric model for loadings that are the same on every segment.
CZDEL	Edits or clears cohesive zone sections.
CZMESH	Creates and meshes a cohesive zone group of elements.
DESIZE	Controls default element sizes.
EORIENT	Reorients solid element normals.
EREFINE	Refines the mesh around specified elements.
ESIZE	Specifies the default number of line divisions.
ESYS	Sets the element coordinate system attribute pointer.
FVMESH	Generates nodes and tetrahedral volume elements from detached exterior area elements (facets).
GSGDATA	Specifies the reference point and defines the geometry in the fiber direction for the generalized plane strain element option.
IMESH	Generates nodes and interface elements along lines or areas.
KATT	Associates attributes with the selected, unmeshed keypoints.
KCLEAR	Deletes nodes and point elements associated with selected keypoints.
KESIZE	Specifies the edge lengths of the elements nearest a keypoint.
KMESH	Generates nodes and point elements at keypoints.
KREFINE	Refines the mesh around specified keypoints.
KSCON	Specifies a keypoint about which an area mesh will be skewed.
LATT	Associates element attributes with the selected, unmeshed lines.
LCCAT	Concatenates multiple lines into one line for mapped meshing.
LCLEAR	Deletes nodes and line elements associated with selected lines.
LESIZE	Specifies the divisions and spacing ratio on unmeshed lines.
LMESH	Generates nodes and line elements along lines.
LREFINE	Refines the mesh around specified lines.
MAT	Sets the element material attribute pointer.
MCHECK	Checks mesh connectivity.
MODMSH	Controls the relationship of the solid model and the FE model.
MOPT	Specifies meshing options.
MSHAPE	For elements that support multiple shapes, specifies the element shape to be used for meshing.
MSHCOPY	Simplifies the generation of meshes that have matching node element patterns on two different line groups (in 2-D) or area groups (3-D).
MSHKEY	Specifies whether free meshing or mapped meshing should be used to mesh a model.
MSHMID	Specifies placement of midside nodes.
MSHPATTERN	Specifies pattern to be used for mapped triangle meshing.
NREFINE	Refines the mesh around specified nodes.
PSMESH	Splits an initially continuous group of beam, shell, plane, or solid elements into two unconnected groups, tied together with PRETS179 pretension elements.
REAL	Sets the element real constant set attribute pointer.
RTHICK	Defines variable thickness at nodes for shell elements.
SHPP	Controls element shape checking.
SMRTSIZE	Specifies meshing parameters for automatic (smart) element sizing.
TCHG	Converts 20-node degenerate tetrahedral elements to their 10-node non-degenerate counterparts.
TIMP	Improves the quality of tetrahedral elements that are not associated with a volume.
TYPE	Sets the element type attribute pointer.
VATT	Associates element attributes with the selected, unmeshed volumes.
VCLEAR	Deletes nodes and volume elements associated with selected volumes.
VIMP	Improves the quality of the tetrahedral elements in the selected volume(s).
VMESH	Generates nodes and volume elements within volumes.
VEORIENT	Specifies brick element orientation for volume mapped (hexahedron) meshing.
VSWEEP	Fills an existing unmeshed volume with elements by sweeping the mesh from an adjacent area throughout the volume.

Table 2.37: Nodes

These PREP7 commands are used to create, modify, list, etc., nodes.
CENTER	Defines a node at the center of curvature of 2 or 3 nodes.
FILL	Generates a line of nodes between two existing nodes.
MOVE	Calculates and moves a node to an intersection.
N	Defines a node.
NAXIS	Generates or clears nodes for general axisymmetric element sections.
NANG	Rotates a nodal coordinate system by direction cosines.
NDELE	Deletes nodes.
NDIST	Calculates and lists the distance between two nodes.
NGEN	Generates additional nodes from a pattern of nodes.
NKPT	Defines a node at an existing keypoint location.
NLIST	Lists nodes.
NMODIF	Modifies an existing node.
NORA	Rotates nodal coordinate systems to surface normal.
NPLOT	Displays nodes.
NREAD	Reads nodes from a file.
NROTAT	Rotates nodal coordinate systems into the active system.
NRRANG	Specifies the range of nodes to be read from the node file.
NSCALE	Generates a scaled set of nodes from a pattern of nodes.
NSMOOTH	Smooths selected nodes among selected elements.
NSYM	Generates a reflected set of nodes.
NWRITE	Writes nodes to a file.
QUAD	Generates a quadratic line of nodes from three nodes.
SOURCE	Defines a default location for undefined nodes or keypoints.
TRANSFER	Transfers a pattern of nodes to another coordinate system.

Table 2.38: Elements

These PREP7 commands are used to create, modify, list, etc., elements.
AFSURF	Generates surface elements overlaid on the surface of existing solid elements and assigns the extra node as the closes fluid element node.
E	Defines an element by node connectivity.
ECPCHG	Optimizes degree-of-freedom usage in a coupled acoustic model.
EDELE	Deletes selected elements from the model.
EGEN	Generates elements from an existing pattern.
EINFIN	Generates structural infinite elements from selected nodes.
EINTF	Defines two-node elements between coincident nodes.
ELIST	Lists the elements.
EMID	Adds or removes midside nodes.
EMODIF	Modifies a previously defined element.
EMORE	Adds more nodes to the just-defined element.
EMTGEN	Generates a set of TRANS126 elements
EN	Defines an element by its number and node connectivity.
ENDRELEASE	Specifies degrees of freedom to be decoupled for end release.
ENGEN	Generates elements from an existing pattern.
ENORM	Reorients shell element normals or line element node connectivity.
ENSYM	Generates elements by symmetry reflection.
EORIENT	Reorients solid element normals.
EPLOT	Produces an element display.
EREAD	Reads elements from a file.
EREINF	Generates reinforcing elements from selected existing (base) elements.
ERRANG	Specifies the element range to be read from a file.
ESURF	Generates elements overlaid on the free faces of selected nodes.
ESYM	Generates elements from a pattern by a symmetry reflection.
ESYS	Sets the element coordinate system attribute pointer.
EWRITE	Writes elements to a file.
GCDEF	Defines interface interactions between general contact surfaces.
GCGEN	Creates contact elements for general contact.
INISTATE	Applies initial state data to an element or a selection of elements.
LAYLIST	Lists real constants material properties for layered elements.
LAYPLOT	Displays the layer stacking sequence for layered elements.
LFSURF	Generates surface elements overlaid on the edge of existing solid elements and assigns the extra node as the closest fluid element node.
MAT	Sets the element material attribute pointer.
NDSURF	Generates surface elements overlaid on the edge of existing elements and assigns the extra node as the closest fluid element node.
REAL	Sets the element real constant set attribute pointer.
SHSD	Creates or deletes shell-solid interface to be used in shell-to-solid assemblies.
SWADD	Adds more surfaces to an existing spot weld set.
SWDEL	Deletes spot weld sets.
SWGEN	Creates a new spot weld set.
SWLIST	Lists spot weld sets.
TSHAP	Defines simple 2-D and 3-D geometric surfaces for target segment elements.
TYPE	Sets the element type attribute pointer.
UPGEOM	Adds displacements from a previous analysis and updates the geometry to the deformed configuration.
USRDOF	Specifies the degrees of freedom for the user-defined element USER300.
USRELEM	Specifies the characteristics of the user-defined element USER300.
WTBCREATE	Creates and defines USER300 elements for use in aeroelastic analysis.

Table 2.39: Superelements

These PREP7 commands are used to create and modify superelements.
SE	Defines a superelement.
SEDLIST	Lists the degree-of-freedom solution of a superelement after the use pass.
SELIST	Lists the contents of a superelement matrix file.
SESYMM	Performs a symmetry operation on a superelement within the use pass.
SETRAN	Creates a superelement from an existing superelement.

Table 2.40: Digitizing

These PREP7 commands are used to define nodes by tablet digitizing.
DIG	Digitizes nodes to a surface.
DMOVE	Digitizes nodes on surfaces and along intersections.
DSET	Sets the scale and drawing plane orientation for a digitizing tablet.
DSURF	Defines the surface upon which digitized nodes lie.

Table 2.41: Coupled Degrees of Freedom

These PREP7 commands are used to define, modify, list, etc., coupled degrees of freedom.
CP	Defines (or modifies) a set of coupled degrees of freedom.
CPDELE	Deletes coupled degree of freedom sets.
CPINTF	Defines coupled degrees of freedom at an interface.
CPLGEN	Generates sets of coupled nodes from an existing set.
CPLIST	Lists the coupled degree of freedom sets.
CPMERGE	Merges different couple sets with duplicate degrees of freedom into one couple set.
CPNGEN	Defines, modifies, or adds to a set of coupled degrees of freedom.
CPSGEN	Generates sets of coupled nodes from existing sets.

Table 2.42: Constraint Equations

These PREP7 commands are used to define, modify, list, etc., constraint equations.
CE	Defines a constraint equation relating degrees of freedom.
CECYC	Generates the constraint equations for a cyclic symmetry analysis.
CEDELE	Deletes constraint equations.
CEINTF	Generates constraint equations at an interface.
CELIST	Lists the constraint equations.
CERIG	Defines a rigid region.
CESGEN	Generates a set of constraint equations from existing sets.
RBE3	Distributes the force/moment applied at the master node to a set of slave nodes, taking into account the geometry of the slave nodes as well as weighting factors.

Table 2.43: Status

These PREP7 commands are for use with the STAT command.
AREAS	Specifies "Areas" as the subsequent status topic.
BOOL	Specifies "Booleans" as the subsequent status topic.
CEQN	Specifies "Constraint equations" as the subsequent status topic.
COUPLE	Specifies "Node coupling" as the subsequent status topic.
DIGIT	Specifies "Node digitizing" as the subsequent status topic.
ELEM	Specifies "Elements" as the subsequent status topic.
ETYPE	Specifies "Element types" as the subsequent status topic.
FEBODY	Specifies "Body loads on elements" as the subsequent status topic.
FECONS	Specifies "Constraints on nodes" as the subsequent status topic.
FEFOR	Specifies "Forces on nodes" as the subsequent status topic.
FESURF	Specifies "Surface loads on elements" as the subsequent status topic.
GEOMETRY	Specifies "Geometry" as the subsequent status topic.
KEYPTS	Specifies "Keypoints" as the subsequent status topic.
LINE	Specifies "Lines" as the subsequent status topic.
MATER	Specifies "Material properties" as the subsequent status topic.
MESHING	Specifies "Meshing" as the subsequent status topic.
NODES	Specifies "Nodes" as the subsequent status topic.
PRIM	Specifies "Solid model primitives" as the subsequent status topic.
RCON	Specifies "Real constants" as the subsequent status topic.
SELM	Specifies "Superelements" as the subsequent status topic.
TBLE	Specifies "Data table properties" as the subsequent status topic.
VOLUMES	Specifies "Volumes" as the subsequent status topic.

Table 2.44: Explicit Dynamics

These PREP7 commands are used for an explicit dynamic analysis.
EDASMP	Creates a part assembly to be used in an explicit dynamic analysis.
EDBOUND	Defines a boundary plane for sliding or cyclic symmetry.
EDBX	Creates a box shaped volume to be used in a contact definition.
EDCGEN	Specifies contact parameters for an explicit dynamic analysis.
EDCLIST	Lists all contact entity specifications in an explicit dynamic analysis.
EDCMORE	Specifies additional contact parameters for a given contact definition in an explicit dynamic analysis.
EDCNSTR	Defines various types of constraints for an explicit dynamic analysis.
EDCONTACT	Specifies contact surface controls for an explicit dynamic analysis.
EDCRB	Constrains two rigid bodies to act as one in an explicit dynamic analysis.
EDCURVE	Specifies data curves for an explicit dynamic analysis.
EDDBL	Sets the single or double precision version of LS-DYNA into effect.
EDDC	Deletes or deactivates/reactivates contact entity specifications in an explicit dynamic analysis.
EDIPART	Defines inertia for rigid parts in an explicit dynamic analysis.
EDLCS	Defines a local coordinate system for use in explicit dynamic analysis.
EDMP	Defines material properties for an explicit dynamic analysis.
EDNB	Defines a nonreflecting boundary in an explicit dynamic analysis.
EDNDTSD	Allows smoothing of noisy data for explicit dynamic analyses and provides a graphical representation of the data.
EDNROT	Applies a rotated coordinate nodal constraint in an explicit dynamic analysis.
EDPART	Configures parts for an explicit dynamic analysis.
EDPC	Selects and plots explicit dynamic contact entities.
EDSP	Specifies small penetration checking for contact entities in an explicit dynamic analysis.
EDWELD	Defines a massless spotweld or generalized weld for use in an explicit dynamic analysis.

Table 2.45: Sections

These PREP7 commands manage sections.
BSAX	Specifies axial strain and force for a nonlinear general beam section.
BSM1	Specifies bending moment and curvature in plane XZ for a nonlinear general beam section.
BSM2	Specifies bending moment and curvature in plane XY for a nonlinear general beam section.
BSMD	Specifies mass density for a nonlinear general beam section.
BSS1	Specifies transverse shear force and strain in plane XZ for a nonlinear general beam section.
BSS2	Specifies transverse shear force and strain in plane XY for a nonlinear general beam section.
BSTE	Specifies a thermal expansion coefficient for a nonlinear general beam section.
BSTQ	Specifies cross section torque and twist for a nonlinear general beam section.
CBMD	Specifies preintegrated mass-density matrix for composite-beam sections.
CBMX	Specifies preintegrated cross-section stiffness for composite-beam sections.
CBTE	Specifies a thermal expansion coefficient for a composite-beam section.
CBTMP	Specifies a temperature for the composite-beam section matrix.
SDELETE	Deletes sections from the database.
SECCONTROL	Supplements or overrides default section properties.
SECDATA	Describes the geometry of a section.
SECJOINT	Defines local coordinate systems at joint element nodes and other data for joint elements.
/SECLIB	Sets the default section library path for the SECREAD command.
SECLOCK	Specifies locks on the element degrees of freedom.
SECNUM	Sets the element section attribute pointer.
SECOFFSET	Defines the section offset for cross sections.
SECPLOT	Plots the geometry of a section to scale.
SECREAD	Reads a custom section library or a user-defined section mesh into ANSYS.
SECSTOP	Specifies stops on the element degrees of freedom.
SECTYPE	Associates section type information with a section ID number.
SECWRITE	Creates an ASCII file containing user mesh section information.
SFLEX	Sets section flexibility factors for pipe elements.
SLIST	Summarizes the section properties for all defined sections in the current session of ANSYS.
SLOAD	Loads a pretension section.
SSBT	Specifies the bending thermal effects quantity for a preintegrated shell section.
SSMT	Specifies the membrane thermal effects quantity for a preintegrated shell section.
SSPA	Specifies the membrane stiffness quantity for a preintegrated shell section.
SSPB	Specifies the coupling stiffness quantity for a preintegrated shell section.
SSPD	Specifies the bending stiffness quantity for a preintegrated shell section.
SSPE	Specifies the transverse shear stiffness quantity for a preintegrated shell section.
SSPM	Specifies the mass density and stress-free initial temperature for a preintegrated shell section.

Table 2.46: Morphing

These PREP7 commands are used to adjust the finite element mesh in the non-structural regions to coincide with the deflections of the structural regions.
MORPH	Specifies morphing and remeshing controls.
DAMORPH	Move nodes in selected areas to conform to structural displacements.
DEMORPH	Move nodes in selected elements to conform to structural displacements.
DVMORPH	Move nodes in selected volumes to conform to structural displacements.

Table 2.47: Artificially Matched Layers

These PREP7 commands are used to create artificially matched layers (PMLs or AMLs) designed to absorb high frequency waves.
PMLOPT	Defines perfectly matched layers (PMLs) or irregular perfectly matched layers (IPMLs).
PMLSIZE	Determines the number of PML or IPML layers.

Table 2.48: Special Purpose

These PREP7 commands are used for special-purpose operations.
AEROCOEFF	Computes the aero-damping and stiffness coefficients and writes them to an APDL array
CINT	Defines parameters associated with fracture parameter calculations.
/CYCEXPAND	Verifies a cyclically symmetric model by graphically expanding it partially or into the full 360 degrees.
CYCFREQ	Specifies solution options for a cyclic symmetry mode superposition harmonic analysis.
CYCLIC	Specifies a cyclic symmetry analysis.
CYCOPT	Specifies solution options for a cyclic symmetry analysis.
EMSYM	Specifies circular symmetry for electromagnetic sources.
MSTOLE	Adds two extra nodes from FLUID116 elements to SURF152 elements for convection analyses.
PERBC2D	Generates periodic constraints for 2-D planar magnetic field analyses.
PHYSICS	Writes, reads, or lists all element information.
RACE	Defines a "racetrack" current source.
SSTATE	Defines a steady-state rolling analysis.
XFDATA	Defines a crack in the model by specifying nodal level set values.
XFENRICH	Defines parameters associated with crack propagation using XFEM.
XFLIST	Lists enrichment details and associated crack information.