Learning Forum

[rani.a]

Hi,

I am performing harmonic analysis, and I would want to understand how to restrict a body motion within the overall boundary. 
Here: Red box is the boundary, blue box is the body inside and black arrows represent the maximum movement. Also, FYI, the entire system (red and blue) is undergoing vibration.

Kindly help me with this on how to restrict the body motion within boundary.

[rani.a]

Hoping for a quick response.

[peteroznewman]

Hi rani.a,

Harmonic response is a linear analysis, so it cannot restrict the blue body that has clearance inside the red body from passing through the red body.  The best you can do is set up some measurements of the clearance and plot the results to determine if any of the clearance measurements goes negative for any of the frequencies in the results.

Transient Structural (not using Modal Superposition) can have frictional contact between the red and blue bodies and can model the nonlinear contact that prevents the bodies from passing through each other during the time history of the vibration. You need to provide the loads as a time history which makes it more difficult to sweep through all the frequencies of interest.

[rani.a]

Hi Peter,

Thank you for the response. I am trying to understand Ansys as a new learner. Can you please help me by showing a step-wise / easier method of understanding, if possible. 

[peteroznewman]

You can start by taking this free course: https://innovationspace.ansys.com/product/structural-dynamics/

And this course: https://innovationspace.ansys.com/product/topics-in-structural-dynamic-simulation/

[rani.a]

Hi,

Thanks! Will look into it.