Calculate area from moses

Discussion in 'Stability' started by mactavish, Jan 22, 2023.

  1. mactavish
    Joined: Sep 2014
    Posts: 14
    Likes: 1, Points: 1, Legacy Rep: 10
    Location: philippines

    mactavish Junior Member

    Hi,

    I would like to determine how to calculate the area in the attached.

    You can see there are two area columns one is for righting and one is for heeling.

    I've tried using Simpson but I can't seem to reverse engineer the formula of the area.

    Please see attached file for your reference.

    upload_2023-1-23_9-39-54.png
    upload_2023-1-23_9-40-19.png

    I have attached as well the graph. I would like to determine the formula for the area.

    Thank you in advance,
     
  2. mc_rash
    Joined: Aug 2020
    Posts: 96
    Likes: 29, Points: 18
    Location: Netherlands

    mc_rash Junior Member

    What was your result? I assume you didn't use Simpson properly, I got a difference of ~0.08 % and if proper done you also should get reasonable results.

    f(x)*dx ~ h/3*[f(x0)+4f(x1)+2f(x2)+...+4f(xn-1)+f(xn)]
     
    fallguy likes this.
  3. mactavish
    Joined: Sep 2014
    Posts: 14
    Likes: 1, Points: 1, Legacy Rep: 10
    Location: philippines

    mactavish Junior Member


    Hi Mate,

    Can I see your result. I dunno what im missing. Would be glad if you could share an excel or show a bit calculations?

    Thank you,
     
  4. mactavish
    Joined: Sep 2014
    Posts: 14
    Likes: 1, Points: 1, Legacy Rep: 10
    Location: philippines

    mactavish Junior Member

    i tried but im getting wrong values

    upload_2023-1-23_19-0-35.png
    SM x gz = fa but my fa does not tally the one from moses...
    I'm trying to get it by degrees
     

  5. mactavish
    Joined: Sep 2014
    Posts: 14
    Likes: 1, Points: 1, Legacy Rep: 10
    Location: philippines

    mactavish Junior Member

    upload_2023-1-23_19-57-32.png
    Got it, i was multiplying it to radians silly me. hence im getting the wrong answer.

    i posted the 20.24 area in 12 degrees...

    Thanks mc
     
    fallguy likes this.
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.