2 point lift analysis

- June 30, 2020 at 5:31 am
  
  kaitova
  Subscriber
  
  Hi,
  
  can somebody advise me why I get this error in 2 point lift if the acceleration goes along the cover? Why does model rotate? I often get this mistake, can't understand the reason behind it. Than you
- June 30, 2020 at 10:31 am
  
  Aniket
  Ansys Employee
  
  Are you suspending the model from 2 springs? Can you please explain your setup in more detail? What error do you get?
  
  -Aniket
  
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- June 30, 2020 at 1:59 pm
  
  peteroznewman
  Subscriber
  
  Three points have to lie along the gravity vector line for there to be no motion or dynamic rotation of a two-point lift model as you have shown.
  
  The skyhook point at the top, the center point between the spring attachments and the Center of Mass point all have to be in a straight line parallel to the gravity vector. If any one of those three points are not on the gravity vector line, then there will be a moment that generates motion.

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