Barge Stability

Discussion in 'Stability' started by Hussein Atwi, Apr 12, 2019.

  1. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    First, Thank you for sharing that self built html, and sorry for the late response. I have received Biran's book and going through it as we speak. I will get back to you with additional information once I improve my general understanding of this topic.
     
  2. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    It is challenging, specially when I have never even been in contact with any professional work.
     
  3. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    Even if you were, all comments will be helpful. this is the first time that I'm subjected to any kind of work like that, so positive and negative feedback will only do me good. This was based on my general understanding of what I was able to look/find using our friend google. although, now I am reading the book that I have ordered and slowly attempting to build a broader understanding.
     
  4. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    Well that is exactly what I am working on. Example: I have 18 blocks of Precast Concrete that will be loaded and evenly distributed on a barge which then the Truck and SPMT trailers will just go underneath them lift it up and drive off to delivery. I am required to know how to set the precast how to ensure the deck is capable of handling all the weight when also including the truck and trailer. Then I have to ensure that the barge is stable and stays flat ( This is where the hydrostatics part comes into play). My boss, sent me an email asking me to Learn about hydrostatic stability and build an excel calculator that will tell us where to load the cargo, where all we have to do is change the dimensions of the barge and add the load x-y-z coordinates , we need to know also how will we have to barge it. Excuse my summary but I am trying to make as simple as possible.
     
    DogCavalry likes this.
  5. Dejay
    Joined: Mar 2018
    Posts: 721
    Likes: 138, Points: 43
    Location: Europe

    Dejay Senior Newbie

    This is somewhat related, as far as I understand it normally you would have a "trim and stability booklet" for your boat:
     
  6. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    oh thank you so much this was an extremely helpful he is lame kind off but very informative lol. as per the table you where talking about I uploaded a pdf example of what i found online. If that is the table you were talking about I'm currently trying to go through it and understand what it means exactly and how I can translate it into my own excel sheet.
     

    Attached Files:

  7. Dejay
    Joined: Mar 2018
    Posts: 721
    Likes: 138, Points: 43
    Location: Europe

    Dejay Senior Newbie

    What? I love his whimsical videos haha.

    I don't have any experience with any of this, but that sheet looks like most of what you need? It doesn't make any allowances for the center of gravity not being above the center of buoyancy. But if you make a spreadsheet allowing you to balance the cargo out that might not be an issue. Maybe not being centered needs to be avoided at all costs?
    I also don't know what the longitudinal and transverse moment of inertia does to safety / seakeeping (how spread out your weights are and how fast it accelerates based on forces from waves).
     
  8. Heimfried
    Joined: Apr 2015
    Posts: 535
    Likes: 139, Points: 43, Legacy Rep: 37
    Location: Berlin, Germany

    Heimfried Senior Member

    A stability booklet shows much more than this pdf table. Heel and trim is not considered in the pdf table, but is important.

    In reality there is no way to prevent a certain amount of heel and trim at least while you are loading or unloading the barge. Assumed the loads are not containing liquids with free surfaces, there is no hydrostatic point in calculating the position of the center of gravity (CoG[L1]) of a part of the load and the CoG[V] of the loading vehicle. The empty barge will have its CoG[B0] at a known position. The hydrostatic part is to look at the (moving) position of the combined CoG[1] of load, vehicle and barge and calculate what heel and trim it will cause. At the end of loading the first piece after the vehicle leaved the barge there will be a CoG[B1] for the partly loaded barge.
     
    Dejay likes this.
  9. DCockey
    Joined: Oct 2009
    Posts: 5,229
    Likes: 634, Points: 113, Legacy Rep: 1485
    Location: Midcoast Maine

    DCockey Senior Member

  10. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    This was a fun read through all the 3 different articles. Thank you ! I am considering of buying their spreadsheet and go through it and see how it works.

    The other thing also Found several youtube videos. Now hopefully over this weekend I'll combine my general understanding and be following up with an update to this post with what I have done/understood so far.
     
  11. Hussein Atwi
    Joined: Apr 2019
    Posts: 11
    Likes: 1, Points: 1
    Location: houston

    Hussein Atwi Junior Member

    This is another used example for a barge drawing that I was able to acquire from a friend of mine.
     

    Attached Files:

  12. sonnyofc
    Joined: Apr 2019
    Posts: 2
    Likes: 0, Points: 1
    Location: Indonesia

    sonnyofc New Member

    hope my excel program about stability of barge can help solve your problem. You may reach the program on MyStore-OfcSonny https://specialistexcel.ecwid.com
     
  13. DogCavalry
    Joined: Sep 2019
    Posts: 3,076
    Likes: 1,570, Points: 113
    Location: Vancouver bc

    DogCavalry Senior Member

    And thus do we learn. But the generosity of the members of the forum always surprises, and often moves me. A microcosm of a better world than the one we live in.
     
    BlueBell and Ad Hoc like this.
  14. Zachary Peter
    Joined: Jun 2020
    Posts: 8
    Likes: 1, Points: 3
    Location: Alexandria Egypt

    Zachary Peter Junior Member

    Hey, congrats on the internship! Working on hydrostatic stability for barges can be a bit complex, but it's definitely doable with Excel. Start by looking into Archimedes' principle, metacentric height, and basic stability calculations. You'll need to consider the barge's geometry, weight distribution, and water density. There are also some ready-made spreadsheets and tutorials online that might help as a reference.
     
    DogCavalry likes this.

  15. Dave G 9N
    Joined: Jan 2024
    Posts: 56
    Likes: 27, Points: 18
    Location: Lindstrom MN

    Dave G 9N Junior Member

    Thank you for that, I had never heard it named before. Nothing inspires some people as much as the opportunity to make someone else look bad. It is amazing how effective it can be. I looked it up and learned about Socratic trolling. This technique has been around for a long time. Aristotle's would be take by Rachael Barney.
     
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.