CHACAB

Bulk Data Entry Defines the acoustic absorber element in coupled fluid-structural analysis.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CHACAB EID PID G1 G2 G3 G4 G5 G6  
  G7 G8 G9 G10 G11 G12      
      G17 G18 G19 G20      

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CHACAB 11 9 221 222 225 226 227 229  
  321 323              

Definitions

Field Contents SI Unit Example
EID Unique element identification number.

No default (Integer > 0)

 
PID Identification number of a PACABS property entry.

Default = EID (Integer > 0)

 
Gi Grid point identification numbers of connection points.

Default = blank (Integer ≥ 0)

 

Comments

  1. Element identification numbers should be unique with respect to all other element identification numbers.
  2. Grids G1 through G4 should be provided consecutively about one quadrilateral face. G5 through G8 should be provided on the opposite face with G5 opposite G1, G6 opposite G2, and so on.
  3. The grids G9 to G20 are optional. If any edge connection point is blank or set to zero, the element formulations are modified to provide proper results for reduced number of connections. Corner grids cannot be deleted. The second continuation line is not mandatory. Additionally, it recommended that the edge points should be present within the mid-third of the edge.