Learning Forum

[Bimark9]

how does the maximum number of cycles and steps affect my solution

[Karthik R]

Hello,

Which tool are you using and what it the scope behind your question?

Thanks

Karthik

[Bimark9]

am using Ansys WB R19.2

I wanted to know if the processing time or the solve time depends on the number of cycles and steps

thank you 

[Bimark9]

in addition to that am running an explicit study

[SaiD]

Hi,

An explicit analysis takes small steps forward in time, with each step taken forward being called the cycle. The size of the cycle is determined by the CFL condition and is dependent on the material properties and mesh density. The Maximum Number of Cycles is the largest number of these tiny steps that an analysis can take. E.g. If the analysis End Time is 1e-7 and it is determined by the solver that the step size (or time increment) to be used is 1e-10. That means it needs 1e-7/1e-10 = 1000 cycles. Now if the Maximum Number of Cycles is set to 100, the solver will stop after 100 cycles and hence the simulation will not be completed.

It is recommended to define a large number for Maximum Number of Cycles so that the simulation runs till the defined End Time.

A Step is a small interval of time in which some new load is applied or some condition changes. E.g. If you have a case where a force of 100N is applied at t=0 sand at t=0.01 s an additional load of 200 N is applied. Then you would have at least 2 steps, first step from 0 to 0.01 s and second step from 0.01 s to analysis end time.

You can read more about it here:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/exd_ag/ds_explicit_dyn_settings.html%23ds_exd_settings_step

 

Hope this helps,

Sai