Page 2 of 2 FirstFirst 1 2
Results 21 to 22 of 22

Thread: Point Loads Calculation with more than 2 supporting points

  1. #21
    Associate Engineer
    Join Date
    Mar 2012
    Well, my assumptions are as below:

    1) The weights of all the components are static.
    - In our products, all the components are static except the compressor(s), and the total vibration is less than 1mm (in fact, less than 100 micron), thus I believe that it can be ignored when calculating the point-loads if compared to few thousand KG static weights.

    2) There is no deflection at the supporting points of the unit base frame.
    - As the height level of the spring isolator can adjusted, we always instruct our client to adjust the spring isolators to the same height after the unit is sitting on it.
    - Thus, I believe that we can assume no deflection at the supporting points of the unit base frame.

    It may be that I did not tell these assumptions up-front, the discussion in here becomes complicated with the dynamic loads.

    I will need some times to digest the formula posted by zeke. By the way, just looking at the final result of the example, ".22F,.24F,.26F,.28F", it seems like quite similar to my calculation in post #11. Is it?

  2. #22
    Principle Engineer
    Join Date
    Mar 2011
    No, and also your 4 support solution doesn't look right .
    Since my solution used the same assumptions, it is also wrong.
    I redid it for the 4 point and got
    P3=.308F, P4=.260F
    CM located at 80,50
    Last edited by zeke; 04-18-2012 at 09:26 PM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts