stefanos9891
Mechanical
- Nov 16, 2012
- 3
Hello everyone, this is my first thread
I had this project recently where I had to perform modal analysis in Ansys. The geometry and the loading was symmetric in one plane. Initially I performed a full model analysis and I extracted the natural frequencies and mode shapes. I was only interested in the first mode because the project specified that the componend was moving axially (in Y axis)and that was represented in that mode. Also the result of the natural frequency lied in the frequency range specified in the project.
Then I tried to run the same analysis but only this time i used half model. What i observed is that the first mode gave almost the exact same result with the full model.
When i looked about this I found out that symmetry is not recommended for moadal analysis. But in this case could I use half model if I am only interested in that mode?
Thank you in advance
I had this project recently where I had to perform modal analysis in Ansys. The geometry and the loading was symmetric in one plane. Initially I performed a full model analysis and I extracted the natural frequencies and mode shapes. I was only interested in the first mode because the project specified that the componend was moving axially (in Y axis)and that was represented in that mode. Also the result of the natural frequency lied in the frequency range specified in the project.
Then I tried to run the same analysis but only this time i used half model. What i observed is that the first mode gave almost the exact same result with the full model.
When i looked about this I found out that symmetry is not recommended for moadal analysis. But in this case could I use half model if I am only interested in that mode?
Thank you in advance