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Robot Structural Analysis

Active Member
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?








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Product Support
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.


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Artur Kosakowski
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