# System Collectors and Systems

## System Collectors

System collectors collect and organize systems.

### LS-DYNA Cards

System collector cards can be previewed, but not edited.
Card Description
*DEFINE_TRANSFORMATION Define a transformation for the INCLUDE_TRANSFORM keyword option.
Note: Transformations can be created using the Transformation Manager.
*INCLUDE_PATH Defines path for the include file location.
Note: Card Edit is not available. Keyword details can be accessed from the Include file options in the Include browser.
*INCLUDE_STAMPED_PART Attaches a file that has stamping results for a part in the model as an include file.
Note: Card Edit is not available. Keyword details can be accessed from the Include file options in the Include browser.
*INCLUDE_STAMPED_PART_SET Attaches a file that has stamping results for a collection of parts (set) in the model as an include file.
Note: Card Edit is not available. Keyword details can be accessed from the Include file options in the Include browser.
*INCLUDE_TRANSFORM Include file that supports offset on its content IDs and transforms on its contents.
Note: HyperMesh support offset on the entity ID's. During import, offsets are applied on to the ID's of the corresponding include_transform file contents. During export, offset is subtracted from the ID's. The current release only supports Input and output therefore the offsets cannot be changed.
*NODE_TRANSFORM Transformation defined on node set.
Note: Transformations can be created using the Transformation Manager.

Card Description
/TRANSFORM/ROT Defines a rotation for a node group around a defined axis, center of rotation and rotation angle.
Note: Block Format Keyword
/TRANSFORM/TRA Defines a translation for a node group with a defined vector.
Note: Block Format Keyword
/TRANSFORM/SCA Defines a scale for a node group with defined scale center and scale factor.
Note: Block Format Keyword
/TRANSFORM/SYM Defines a symmetry for a node group normal to the plane defined by a vector.
Note: Block Format Keyword

## Systems

System entities, commonly called coordinate systems, can be defined as rectangular, cylindrical, or spherical coordinate systems.

Every system must be organized into one system collector, and therefore are mutually exclusive to a system collector.

Several systems may be nested. There are two types of system assignments to entities; as a reference system, or as a displacement system. A system may be a reference system, a displacement system, or both.
Reference System
Defines the geometric positions of entities.
Entities that can be assigned a reference system include systems, nodes, and loads. By default, each of these entities is defined in the global system with an ID of zero. Entity data is always displayed and reviewed transformed into the global system. When a reference system is deleted, the position of the entity assigned that reference system is maintained relative to the global system in the transformation process. For example, if you define the nodes of a cylindrical structure in a cylindrical reference coordinate system, and then delete the cylindrical reference coordinate system in which the nodes are defined, the model retains its cylindrical shape and also its location in space but is now referenced to the global system.
Displacement System
Defines the nodal degree of freedom coordinate system assigned to a node.
The only entity that may be assigned a displacement system is a node. When you delete a displacement system, the nodal degrees of freedom are not transformed to the global system, so all degree of freedom definitions after the deletion of the displacement system are now simply in the global system.

### Abaqus Cards

A system can be exported as a *SYSTEM or *TRANSFORM card depending on the nodal assignment of the system. To export an *ORIENTATION card it is required to enable the option in the card image of the system card.
Card Description
*ORIENTATION Define a local axis system for material or element property definition, for kinematic coupling constraints, for free directions for inertia relief loads, or for connectors.
Note: The *ORIENTATION card needs a name in Abaqus. Since systems do not have a name, a name needs to be entered in the system card image. The restriction of one system per system collector has been removed with version 10.0 – SA1-130.

DEFINITION = NODES option with only two nodes is converted to DEFINITION=COORDINATES upon import from an input file.

*ORIENTATION with SYSTEM = Z RECTANGULAR is converted to RECTANGULAR upon import from an input file.

*SYSTEM Specify a local coordinate system in which to define nodes.
Note: Whenever a system is assigned to nodes with the set reference option from the Systems panel activated, a *SYSTEM card is exported before the node block of its assignment.
*TRANSFORM Specify a local coordinate system at nodes.
Note: If assigned to individual nodes, on export each *TRANSFORM card creates references to an automatically generated *NSET card. This *NSET card is followed by the list of the nodes that are assigned to the coordinate system with the set displacement option.

Systems can be assigned to node sets with the same assignment procedure.

### ANSYS Cards

Card Description
LOCAL Defines a local coordinate system by location and orientation.
Note: Even if KCN>10, 10 is added to the current value.
LOCAL Defines a local coordinate system by location and orientation.
Note: Type = PRM not supported

### EXODUS Cards

Card Description
Coordinate Frame Defined for reference to materials and boundary conditions.

### LS-DYNA Cards

Systems cards can be previewed, but not edited.
Card Description
*DEFINE_COORDINATE_NODES Define a local coordinate system with three nodes.
*DEFINE_COORDINATE_SYSTEM Define a local coordinate system with three points.
*DEFINE_COORDINATE_VECTOR Define a local coordinate system with two vectors.

### Nastran Cards

Card Description
CORD1R Defines a rectangular coordinate system using three grid points.
CORD2R Defines a rectangular coordinate system using the coordinates of three points.
CORD1C Defines a cylindrical coordinate system using three grid points.
CORD2C Defines a cylindrical coordinate system using the coordinates of three points.
CORD1S Defines a spherical coordinate system by reference to three grid points.
CORD2S Defines a spherical coordinate system using the coordinates of three points.

### OptiStruct Cards

Card Description
CORD1C Defines a cylindrical coordinate system using three grid points. The first point is the origin, the second lies on the Z-axis, and the third lies in the X-Z plane.
Note: Bulk Data Entry

Created from the create by node reference subpanel when cylindrical is the chosen type.

CORD1R Defines a rectangular coordinate system using three grid points. The first point is the origin, the second lies on the Z-axis, and the third lies in the X-Z plane.
Note: Bulk Data Entry

Created from the create by node reference subpanel when rectangular is the chosen type.

CORD1S Defines a spherical coordinate system using three grid points. The first point is the origin, the second lies on the Z-axis, and the third lies in the X-Z plane.
Note: Bulk Data Entry

Created from the create by node reference subpanel when spherical is the chosen type.

CORD2C Defines a cylindrical coordinate system using three grid points specified with respect to a reference coordinate system. The coordinates of the three non-collinear grid points are used to uniquely define the coordinate system. The first point is the origin, the second lies on the Z-axis, and the third lies in the X-Z plane.
Note: Bulk Data Entry

Created from the create by axis direction subpanel when cylindrical is the chosen type.

Various combinations of axes and planes are allowed to be indicated in the create by axis direction subpanel, but will write out the appropriate coordinates to define the z- axis and the x-z plane.

CORD2R Defines a rectangular coordinate system by using three grid points. The coordinates of the three non-collinear grid points are used to uniquely define the coordinate system. The first point is the origin, the second lies on the Z-axis, and the third lies in the X-Z plane.
Note: Bulk Data Entry

Created from the create by axis direction subpanel when rectangular is the chosen type.

Various combinations of axes and planes are allowed to be indicated in the create by axis direction subpanel, but will write out the appropriate coordinates to define the z- axis and the x-z plane.

CORD2S Defines a spherical coordinate system three grid points. The coordinates of the three non-collinear grid points are used to uniquely define the coordinate system. The first point is the origin, the second lies on the Z-axis, and the third lies in the X-Z plane.
Note: Bulk Data Entry

Created from the create by axis direction subpanel when spherical is the chosen type.

Various combinations of axes and planes are allowed to be indicated in the create by axis direction subpanel, but will write out the appropriate coordinates to define the z- axis and the x-z plane.

CORD3R Defines a rectangular coordinate system using three grid points. The first point is the origin, the second lies on the X-axis, and the third lies in the X-Y plane.
Note: Bulk Data Entry

Created from the create by node reference subpanel when rectangular is the chosen type.

CORD4R Defines a rectangular coordinate system using three grid points specified with respect to the basic coordinate system. The coordinates of the three non-collinear grid points are used to uniquely define the coordinate system. The first point is the origin, the second lies on the X-axis, and the third lies in the X-Y plane.
Note: Bulk Data Entry

Created from the create by axis direction subpanel when rectangular is the chosen type.

Various combinations of axes and planes are allowed to be indicated in the create by axis direction subpanel, but will write out the appropriate coordinates to define the z- axis and the x-z plane.

Editing the card image for a CORD2R will allow you to define a CORD4R.

### PAM-CRASH Cards

Card Description
FRAME / Local frame definition - system collectors
Note: If there is a $HMMOVE directive found for a system and that system collector exists in the model, the system is placed in that collector. Otherwise, a separate system collector is made for the frame. If a base node is not given, the system is created at the global origin 0, 0, 0. In case of frame definition with nodes, the system is created at the first node. FRAME / IAXIS = 0 (rectangular) Definition Via 2 Vectors U and V, use “create by axis direction”, x-axis and xy plane to create frame. FRAME / IAXIS = 1 (rectangular) Definition Via 3 Nodes (To Define U, V Vectors), use “create by node reference”, x-axis and xy plane to create frame. FRAME / IAXIS = 2 (rectangular) Definition Via 2 Vectors T and U, use “create by axis direction”, z-axis and xz plane to create frame. FRAME / IAXIS = 3 (rectangular) Definition Via 3 Nodes (To Define T, U Vectors), use “create by node reference”, z-axis and xz plane to create frame. FRAME / IAXIS = 4 (cylindrical) Definition Via 2 Nodes (Cylindrical), use “create by node reference”, z-axis and xz plane to create frame. FRAME / IAXIS = 5 (spherical) Definition Via 2 Nodes (Spherical), use “create by node reference”, z-axis and xz plane to create frame. ### Permas Cards Card Description$RSYS Reference system
Note: Assign the system to nodes to write the RSYS parameter in to the nodal coordinates card $COORD.$ROTB Analysis or displacement system assigned to nodes.
Note: Assign a system as displacement system to nodes to receive this card.

Card Description
/FRAME/FIX Describes the frames.
Note: Block Format Keyword
/FRAME/MOV Describes moving frames. Relative motion with respect to a reference frame.
Note: Block Format Keyword
/FRAME/MOV2 Describes moving frames. Relative motion with respect to a reference frame. Moving frame definition differs from /FRAME/MOV.
Note: Block Format Keyword
/FRAME/NOD Describes the node defined moving frame.
Note: Block Format Keyword
/SKEW/FIX Describes the fixed skew frames.
Note: Block Format Keyword
/SKEW/MOV Describes a moving local coordinate system.
Note: Block Format Keyword
/SKEW/MOV2 Describes a moving local coordinate system.
Note: Block Format Keyword

### Samcef Cards

Card Description
.FRA Coordinate system definition
Note:
• I frame_nr TYPE chosen_frame_type
• ORIGIN frame_origin
• V1 axis_definition V2 axis_definition V3 axis_definition