Harmonic load moving at a constant velocity

[karolis_sakalauskas]

Hello,

I am trying to check the comfort criteria (maximum accelerations) for a multi-span continuous pedestrian bridge. The loading model is a harmonic load (F0*cos(wt+phi))moving at a constant velocity (v) along the bridge. I would like to ask, if it is possible to perform this type of analysis on Robot Structural Analysis and how?

Thanks in advance

[Rafacascudo]

Just curious,

What kind of vehicle/machine is that and which is its velocity

What is the frequency?

[Stephane.kapetanovic · Accepted solution]

hi @karolis_sakalauskas 

I don't know if this is what you're looking for, but see if your solution hasn't already been published on the forum.

https://knowledge.autodesk.com/support/robot-structural-analysis-professional/learn-explore/caas/sfd...

https://www.youtube.com/watch?v=MouH2A8DnFA&t=219s

https://forums.autodesk.com/t5/robot-structural-analysis-forum/rotating-rotor/m-p/11349177#M92364

Best Regards

[karolis_sakalauskas]

The load represents a person walking/running along the bridge. The amplitude of the load (F0) is equal to 0.18 kN. The walking/runnung frequency corredponds to the 1st mode of the bridge. The size of the step is 0.7 meters.

[karolis_sakalauskas]

Thank you for your answer. I have also found a useful video which also analyses the similar problem regarding moving harmonic load using time history analysis. It starts from 31:22.

The video link:

https://youtu.be/fRnmamjZbUw?si=CAllUnlOQOf-_EI6