TICA

Bulk Data Entry Defines values for the initial velocity of a set of grids along and about an axis for explicit analysis.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
TICA SID GSID VT VR          
  GA/XA YA ZA GB/XB YB ZB      

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
TICA 100 10 3.0 4.0          
  123     0.0 0.0 1.0      

Definitions

Field Contents SI Unit Example
SID Set identification number.

(Integer > 0)

  
GSID Grid point set identification number.

Default = all grids in the model (blank or Integer > 0)

  
VT Initial velocity along the axis.

(Real)

  
VR Initial velocity about the axis.

(Real)

  
GA, XA, YA, ZA Axis origin. These fields define the origin of the axis. The point may be defined by entering a grid ID in the GA field or by entering X, Y, and Z coordinates in the XA, YA, and ZA fields; these coordinates will be in the basic coordinate system.

Default is the origin of the basic system (Real in all three fields or Integer in first field)

  
GB/XB, YB, ZB Direction of vector for axis definition. These fields define a point. The vector goes from the anchor point to this point. The point may be defined by entering a grid ID in the GB field or by entering X, Y, and Z coordinates in the XB, YB, and ZB fields; these coordinates will be in the basic coordinate system.

No default (Real in all three fields or Integer in first field)

  

Comments

  1. Explicit analysis initial condition sets must be selected with the Subcase Information command IC=SID. It can only be selected in explicit subcases which are defined by an ANALYSIS=EXPDYN Subcase Information Entry.
  2. TICA is primarily used for simulating the uniform rotation of a structure about an axis by defining VR and an axis. A helical (or spiral) shaped motion can also be achieved by defining VR, VT and an axis.
  3. This card is represented as a load collector in HyperMesh.