Optistruct Solution Time for direct frf

Altair Forum User

Hi Guys....

Is there any method or thumb rule to calculate the calculation time of a direct frf solution.

I have a small system with 64GB RAM but large number of nodes to calculate, can anyone suggest any thumb rule over number of nodes to calculate, number of frequencies to output and system specifications.

 

Also, is there any thumb rule that the performance of an frf is maximum with 4 cores?? I read it somewhere....

 

Thanks in advance

Altair Forum User

Hi Harmeek,

 

I don't see any thumb rule for calculating the modes. I believe it all depends on how dense your matrices are in decoupling the matrices and solving the equation directly.

 

OptiStruct do not have a limitation on the performance for FRF step to be maximum at 4 cores. In fact, you can use Domain Decomposition Method (DDM) for FRF step and run the job with multiple cores to get better performance.

 

Please give a try with DDM

 

Thanks

Vikas