Autodesk Robot Structural Analysis

[#1]

When you run a footfall analysis, what is the increment number?  What does it refer to?  Basically, the footfall analysis runs PAINFULLY SLOW.  Strange thing is, even if I choose to only excite ONE node, the increment number does not change.  Limiting walking frequency, number footsteps etc does not change the increment. 

I really need to speed up the analysis but am unsure how to proceed. 

Robot 2011, SP4

6GB RAM, E8500 CPU@3.16GHz

(on the calculations dialogue box)?

[#2]

Hi,

UNfortunatelly user is not able to control number of steps \ increments in footfall analysis. It is done automatically by program.

[#3]

Rafal, thanks.  So what is your suggestion to avoid a 45 hour long analysis?  

[#4]

If you do not mind please send us your model to check.

[#5]

Rafal,

My model has a Hollowcore slab in it. 

For my original footfall analysis run, I set the hollowcore to disregard stiffness in the transverse direction. 

This run gave me 2117 iterations

Today, I turned off the disregard stiffness checkbox, and re-run the analysis.  Now I only have 100 iterations, and the analysis only takes a couple of minutes.  Can you please explain why there is such a large discrepancy in the calculation method. 

Regards.

[#6]

Tony,

Without looking at model - number of modes?

I can see you have subscription so if you want to check this model by my please please create Service Rerquest via subscription center or if you are from GHD I can contact you.