Real Life Example of a non-symmetric eigenvalue problem

[Dennis Chen]

Hello, are there really simple example model of a unsymmetric modal analysis that must be solved (suposedly) with the MODOPT, UNSYM command in ansys mechanical?

I like to build a very simple example demonstrating this capability in Ansys Mechanical and I like to know if there's a simple real life example I can use. 

[Erik Kostson]

 

Hi 

 

Please see this example in help (brake squeal – unsym, modal). As a side no need for commands in modal analysis set.:
In the Analysis Settings, set the Solver type to Unsymmetric (as mentioned in the below example)

https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v252/en/wb_wbtec/WBtecbrakeSolution.html

We also have it as a course/tutorial:

https://innovationspace.ansys.com/courses/courses/understanding-simulations-through-examples-part-2/lessons/break-squeal-analysis-lesson-1/

All the best

Erik

 

 

[Dennis Chen]

Erik, Thank you!   I saw the same example in LS-Dyna too!. 

[Erik Kostson]

That is great - I have not seen that one (LS-Dyna) - many thanks,