Discussion Groups

Robot Structural Analysis

Reply
Active Member
rubenwood
Posts: 10
Registered: ‎02-18-2014

Odd results in my Modal analysis??

110 Views, 1 Replies
02-24-2014 02:17 AM

Hi there,

 

I am working on a large lighting feature for a boat and have to be carefull with the dynamic frequencies. I have made the model and run the modal analysis and i am getting some unacceptable frequencies, however in the result I am getting a 0% Cur.mas in all directions? See below: 

 

Now following the old cliche if it looks wrong it probably is wrong I am doubtful. However the the movement in the model is bizarre too, it is almost torsional, I have attached the exagerrated deflected shape and the original below.

 

Is there something wrong with my analysis or is it possible to get 0% mass movement in all directions?

 

Thanks

 

Capture.PNG

Capture1.PNG

 

results.PNG

Please use plain text.
Product Support
Artur.Kosakowski
Posts: 5,050
Registered: ‎12-17-2010

Re: Odd results in my Modal analysis??

02-24-2014 03:20 AM in reply to: rubenwood

It is possible for antisymmetric shape of torsional vibrations.

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.



Artur Kosakowski
Please use plain text.