/PERTURB (Obsolete)

Block Format Keyword Multiply real values (following the defined normal distribution) to shell thicknesses of selected group of part.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/PERTURB/ID
Perturb_title
F_Mean Deviation Min_cut Max_cut Seed Idistri
grpart_ID                

Definitions

Field Contents SI Unit Example
F_Mean Mean value of the normal distribution

(distribution of factors applied to shell thicknesses applied to selected parts)

(Real)

 
Deviation Deviation of the normal distribution

(Real)

 
Min_cut Minimum value

(Real)

 
Max_cut Maximum value

(Real)

 
Seed Seed of random noise
= 0 (Default)
A random seed value is used.

(Integer)

 
Idistrib Distribution type
= 0 (Default)
Set to 2
= 1
Random distribution
= 2
Normal law distribution

(Integer)

 
grpart_ID Part group identifier

(Integer, maximum 10 digits)

 

Comments

  1. This option is multiplying generated real values (following the defined normal distribution) to shell thicknesses of selected group of part.
  2. Curve of probability density function:

    perturb_density
    Figure 1.
  3. Seed is an integer corresponding to the value used to initialize random number generation that should use for sensitivity analysis or model robustness investigation purpose.
  4. Two computations with the same values, Seed will return exactly to the same results.
  5. If random value is > Max_cut, random value is replaced with Max_cut.
  6. If random value is < Min_cut, random value is replaced with Min_cut.
  7. This option is compatible with /PROP/TYPE1.