defining structural design goals

Discussion in 'Boat Design' started by Annode, Mar 1, 2020.

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  1. TANSL
    Joined: Sep 2011
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    TANSL Senior Member

    My offer would only be a quick calculation of the scantlings so that you can calculate the weight with some reliability, not exactly. Then you can punish yourself as much as you want by learning to calculate the scantlings.:)
    Hydrostatics is not that they can be calculated without weight, but they do not need weight at all.
     
  2. Ilan Voyager
    Joined: May 2004
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    Ilan Voyager Senior Member

    For any structural analysis you need absolutely to estimate the stresses.
    Or the displacement, or in another words the total weight is one of the primordial factors, as the length, the width, and the depth for the first gross determination of the stresses thus the structure of a boat...That means a preliminary drawing. Without entry data you cannot calculate or analyse.
     
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  3. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    This thread has gone exactly the same way on his other threads.

    Wants a simple one liner to satisfy a complex issue or one that requires reasoned understanding and analysis, and yet doesn't like questions of his questions etc... go figure.
     
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  4. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    He wants metrics but dismisses Lloyd's or any other classification society that gives metrics.
     
  5. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    Plating in steel, you have the corrosion aspect also to consider. Thinner loses out in that calculation. What was adequate, becomes inadequate more easily.
     
  6. Annode

    Annode Previous Member

    >NA for something bigger than a dinghy or a coastal small sailboat, is a job with lots a theoretical stuff to learn,
    Perhaps you missed the part about first approximation?

    >after a few years of working in a NA office is a must.
    Luckily the world has progressed since the days when you paid your dues in a office

    >Your very naive questions and your answers specially to Ad Hoc
    My questions are appropriate. Ad Hov is condescending, arrogant and rude. Every one of his "replies" wastes my time, like this reply, in dealing with the endless attempts to reframe my question such that there is one answer and one answer only... HIRE AN NA!

    >If you want to sell it with some value over the price of crap,
    Now you conlfate any design that does not use NA with crap. Nice. Another condescending judgement based on arrogance. This says more about you than me sir

    >If you want to insure you need a design following the rules plus a survey by a class society like the DNV,
    Off topic. Not relevant. lready handled

    >Over 24 m, all boats are submitted to at least some rules even for personal use.
    In first world countries
    >You're in UK s
    wrong

    >you will need the services of a NA
    If they are as obnoxious as this, I would rather sink thx

    >if you want to exploit the boat at least in first and second world countries.
    nope

    >Class rules are not for making overkill scantlings, they are for safety after many years of analysis of disasters
    Well its interesting that you imply anything built without an NA will sink, because one of these "propeerly designed" boats sinks EVERY FOUR DAYS

    >If you want to make charter you'
    nope

    >Nobody with a working brain and common sense
    Ooooh you are nasty

    >At fortiori without plans and a bunch of details and data
    COMPUTER ding ding ding

    >sorry to have to learn boat structural calculations
    COMPUTER

    Another condescending reply that tells me nothing and wasted 10mins of my life with your negative rhetoric.
    PLEASE DONT RESPOND TO ANY MORE OF MY THREADS OK :) I have better things to do than deal with luddites
     
  7. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Then may I suggest you do exactly that - leave this forum and go to one where you feel your myopic understanding and attitude is best served.
    Posters come to this forum for advice and assistance, not to be lectured to by some petulant poster with zero understanding of the issues involved yet attempts to claim the higher moral/technical ground out of shear ignorance and arrogance.
    You wont get any NA or any other professional wishing to go near you nor your attitude..
     
    Ilan Voyager likes this.
  8. Annode

    Annode Previous Member

    Exactly. The plate thickness is more the product of availability and impact as a practical matter. Probably 8mm or 10mm plate

    >He wants metrics but dismisses Lloyd's or any other classification society that gives metrics.
    You are putting words in my mouth. which part of FIRST APPROXIMATION was not clear?

    Thank god for software. and FYI, NA get it wrong all the time. Probably why we have 1000+ pages from Lloyds

    <OICTURE OF CONTAINER SHIP WITH BACK BROKEN UNDER ITS OWN WEIGHT>
     
  9. Annode

    Annode Previous Member

    AD HOC in on your ignre list... yeay ))))))

    Perhaps you missed the part about NOT responding to my threads?
    That was a request. You are a troll. You obviously like baiting people and your sarcasm and passive agreesive comments are offensive. I may be ignorant, but you are arrogant and dismissive. There is no such thing a s stupid question and throwing your weight around doesnt intimidate me. I ask good question, naieve perhaps, and you respond with snark. This says more about you than me.

    You have succeded in turning another of my threads into an adversarial pi$$ing contest of credentials instead of providing useful information and answers like NA with quality websites seem able to do without difficulty.
     
  10. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    Good grief, I'll delay any excursions on the fourth day ! :) Obviously there are no guarantees that any boat does not sink, but accumulated experience leads to accepted practices.
     
  11. rxcomposite
    Joined: Jan 2005
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    rxcomposite Senior Member

    Make it every 4th day to be sure.
     
  12. Annode

    Annode Previous Member

    Just quoting facts from the Naval Architect guy on YouTube )
     
  13. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Better still, just travel on those other non-sinking boats non-properly designed boats, since there must be so many to choose from :D
     

  14. Boat Design Net Moderator
    Joined: Feb 2010
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    Boat Design Net Moderator Moderator

    <Closing this thread at this point>
     
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