FORCE REACTION IN “Y” IS TOO LOW COMPARED WITH THE WEIGHT OF THE EQUIPMENT FULL OF WATER. WHY?

- October 17, 2020 at 1:33 am
  
  carlosjponte
  Subscriber
  
  Dear sirs, Trying to understand the results on my Distillation Tower in horizontal position with an hydrostatic test, starting with three saddles. I just don't get why if the weight of the tower full of water is 7.026.979,23 lbm, THEN the sum of the reactions in Y is 113.190 lbf. This doesn't make sense. The weight of the solid part is 710.794,5 lbm and the weight of the water is 6.316.184,73 lbm. Why the reaction is so low? There's something missing here?. This is a fluid/structure interaction for an hydrostatic test. Two supports are set as FREE in "X" and "Z" and fixed in "Y" and the other one is set as FIXED. Center of gravity or "center of volume" as I understand is the same here in this software. Two important supports are set equally spaced away from the center of gravity as shown in the picture. I'm attaching pictures to help understand this situation. Any thoughts will help. Thank you!
- October 19, 2020 at 5:42 am
  
  Charudatta Bandgar
  Subscriber
  
  Hello Carlosponte ,
  
  To understand this better, I will need to investigate the run file more. I have sent a secure transfer link through your email ID.
  
  Regards.
- October 19, 2020 at 5:50 am
  
  carlosjponte
  Subscriber
  
  Dear friend, thanks for your help. I found the problem and it was that I did not set the inertia load considering the gravity force for the Structural Input and the buoyancy for the fluid.
  
  Thank you again.
  - October 19, 2020 at 5:52 am
    
    Charudatta Bandgar
    Subscriber
    
    Are you getting the correct reaction force now? Carlosponte
- October 19, 2020 at 6:23 am
  
  carlosjponte
  Subscriber
  
  Yes. Reaction is already good!

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