*DEFINE_TRANSFORMATION

LS-DYNA Input Interface KeywordDefines a node and entities transformation(s) used in *INCLUDE_TRANSFORM.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*DEFINE_TRANSFORMATION
TRA_ID      
Option Param_1 Param_2 Param_3 Param_4 Param_5 Param_6 Param_7

Definition

Field Contents SI Unit Example
TRA_ID Transformation ID.

(Integer)

Option
MIRROR
SCALE
ROTATE
TRANSL
TRANSL2ND
 
Param_1 If Option
= MIRROR
X coordinate of symmetry plane normal vector tail.
(Real)
= SCALE
X coordinate of scale value.
Default = 1 (Real)
= ROTATE (Format if all Param are used) 3
X component of rotational axis.
(Real)
= ROTATE (Alternate Format if values of Param_4 to Param_7 are 0) 3
Node identifier 1 to define rotational center.
(Integer)
= TRANSL
X translation.
(Real)
= TRANSL2ND
Node identifier 1 to define translation vector tail.
(Integer)
[ m ]
Param_2 If Option
= MIRROR
Y coordinate of symmetry plane normal vector tail.
(Real)
= SCALE
Y coordinate of scale value.
Default = 1 (Real)
= ROTATE (Format if all Param are used) 3
Y component of rotational axis.
(Real)
= ROTATE (Alternate Format if values of Param_4 to Param_7 are 0) 3
Node identifier 2 to define rotational axis.
(Integer)
= TRANSL
Y translation.
(Real)
= TRANSL2ND
Node identifier 2 to define translation vector tail.
(Integer)
[ m ] for MIRROR, SCALE, ROTATE
Param_3 If Option
= MIRROR
Z coordinate of symmetry plane normal vector tail.
(Real)
= SCALE
Z coordinate of scale value.
Default = 1 (Real)
= ROTATE (Format if all Param are used) 3
Z component of rotational axis.
(Real)
= ROTATE (Alternate Format if values of Param_4 to Param_7 are 0) 3
Rotational angle.
= TRANSL
Z translation.
(Real)
= TRANSL2ND
Translation value.
(Real)
For Format if all Param are use: [ m ]

For Alternate Format if values of Param_4 to Param_7 are 0: [ deg ]

Param_4 If Option
= MIRROR
X coordinate of symmetry plane normal vector head.
(Real)
= ROTATE (Format if all Param are used) 3
X component of rotational center.
(Real)
[ m ]
Param_5 If Option
= MIRROR
Y coordinate of symmetry plane normal vector head.
(Real)
= ROTATE (Format if all Param are used) 3
Y component of rotational center.
(Real)
[ m ]
Param_6 If Option
= MIRROR
Z coordinate of symmetry plane normal vector head.
(Real)
= ROTATE (Format if all Param are used) 3
Z component of rotational center.
(Real)
[ m ]
Param_7
= ROTATE (Format if all Param are used) 3
Rotational angle.
[ deg ]

Comments

  1. This keyword maps to /TRANSFORM.
  2. The option “_TITLE” can be added to the end of this keyword. When “_TITLE” is included, an extra 80 characters long line is added after the keyword input line which allows an entity title to be defined.
  3. There are 2 alternate input format options for the option ROTATE, where all parameter fields are entered, they define the vector (Param_1-Param_3), coordinates (Param_4-Param_6) and angle (Param_7) of rotation, where only Param_1-Param_3 are entered, they describe 2 node IDs defining vector (Param_1-Param_2) and angle of rotation (Param_3).