3D CAD Hull Design - Origin Location?

Discussion in 'Boat Design' started by DCockey, Mar 3, 2018.

  1. TANSL
    Joined: Sep 2011
    Posts: 7,369
    Likes: 699, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Well, my friend Ad Hoc, you have already tried to prove that I do not know anything. You have not achieved it but you can improve. Try again when you like it most. Can you now say something useful to the OP and that it IS CORRECT?.
     
  2. Ad Hoc
    Joined: Oct 2008
    Posts: 7,773
    Likes: 1,678, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Initially yes, only reason being is that it helps to set up the same coordinate system and datum as per the stability programme one is using., otherwise one has to fudge things about to ensure the datums read how you want them to be.
    As noted above, baseline is always lowest part of the hull. So, if your hull is not with a horizontal/straight keel...you place it at the lowest part of the curve/shape.

    The reason for this is simple. When reading your hydrostatics, from the stability programme that has the same 3D hull input datums, you know whether the prop will be below the baseline or not (assuming your design has a prop) and if it doesn't use a prop, it helps to establish parameters for minimal drag, such as the transom depth ratio etc. Thus, you place the datums that suit what YOU want the output to provide which also aids sensitivity analysis later.

    So one must decide where and why you are placing the hull inside the 3D environment beyond just simply importing and exporting from one programme to another.
     
  3. 3dig
    Joined: May 2004
    Posts: 20
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: mt. vernon, wa.

    3dig Junior Member

    Additionally, my software will automatically offset sections based on the location of the initial zero point.
     

  4. TANSL
    Joined: Sep 2011
    Posts: 7,369
    Likes: 699, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    You can export the model from one program to another and, subsequently, place the model correctly in the coordinate system that is needed at that moment.
    Interesting feature. What is your software?
     
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.