/SURF/ELLIPS

Block Format Keyword Describes the hyper-ellipsoid surface definition.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/SURF/ELLIPS/surf_ID/unit_ID
surf_title
skew_ID n                
Xc Yc Zc        
a b c        

Definitions

Field Contents SI Unit Example
surf_ID Surface identifier

(Integer, maximum 10 digits)

  
unit_ID Unit Identifier

(Integer, maximum 10 digits)

  
surf_title Surface title

(Character, maximum 100 characters)

  
skew_ID Skew identifier defining the initial orientation of the surface

(Integer)

  
n Degree of the hyper-ellipsoid

Default = 2 (Integer)

  
Xc Center coordinate

(Real)

  
Yc Center coordinate

(Real)

  
Zc Center coordinate

(Real)

  
a Semi-axis length

(Real)

  
b Semi-axis length

(Real)

  
c Semi-axis length

(Real)

  

Comments

  1. All nodes must belong to a shell element, a brick element or a triangular shell element.
  2. A surface cannot be defined using Madymo surfaces.
  3. A surface cannot be defined by associating a hyper-ellipsoid and another type of surface.
  4. The equation of the hyper-ellopsoid is:
    (1)
    | x − x c a | n + | y − y c b | n + | z − z c b | n = 1
  5. A hyper-ellipsoid can only be a main surface of /INTER/TYPE14.
  6. Input format for MDELLIPS, see /SURF/MDELLIPS.