TICA

Bulk Data Entry Defines the initial velocity on a set of grids along and about an axis.

Attention: Valid for Implicit and 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 Unique 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. The TICA entry can be referenced in the subcase using the IC 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. Support information for this entry is:
    • Direct Transient Analysis (DTRAN)
    • Explicit Dynamic Analysis (NLEXPL)
  4. This card is represented as a load collector in HyperMesh.