I am creating a random field with SARA for a plane stress beam model with 998 nodes. Generating the random field data for a single simulation takes about 20min. Is that expected? What Sampling type or Simulated annealing properties could be changed to reduce the generation time? Do the dx, dy and dz variables affect calculation time?

I made some modifications on task.cc2 in ATENA 2D.

1. Added a Material with Random Fields (no file specified)
2. Setting Concrete (already defined in the example file) as the base
3. Assigning the new material to the "concrete" Macro Element"

I saved the file

I started SARA studio (v 2.2.0.7)

1. New Project
2. It was impossible to write a directory like "c://folder/..." But I could do that in the menu "options" later on.
3. Imported the .cc2 file and selected some variables (E, ft and fc) (I used a normal distribution COV  = 0.1)
4. FREET -> LHS --> General data --> 10 samples --> run
5. started the Model Analysis

I get results and the graphs that are expected in that kind of problem. But when I read in a file (_r.cc2) and I want to see the values of the random field in post-process (scalar > .. > random field values) I get a blue color and no variation, where I expect to see three random fields for E, ft and fc. but I only get "Par (1)".

Some other questions

1. How do I have control on the spatial variation characteristics? (correlation-length and covariance function, e.g. exp(- |tau| / theta ))
2. Where do I find the values of the generated fields in ASCII files so that I can replace them with known fields?

Thank you.