ice class containership

Discussion in 'Boat Design' started by jacckko, Dec 4, 2010.

  1. jacckko
    Joined: Nov 2010
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    jacckko Junior Member

    hi guys!!!
    anyone of you have a project or design of a iceclass containership??
     
  2. JRMacGregor
    Joined: Oct 2005
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    JRMacGregor Junior Member

    What size of ship are you looking for ?

    These are a bit small, but if they are in your size range you may wish to check them out.................

    132 TEU on multi purpose coaster, 82.5m loa
    FLINTHORN, built 1999 by Bodewes Volharding, Netherlands
    GL ice class E3

    572 TEU, 113m LOA
    MARY ARCTICA, container ship for Greenland
    Built 2005, Remontowa, Poland
    DnV ICE 1A

    648 TEU, 169m LOA
    Norilskiy Nickel
    Double acting Arctic type, built by Aker Finnyards, 2006
    Russian ice class

    205m LOA, combination container and ro-ro
    TIMCA
    Built Poland, 2006
    Finnish and LR ice class
     
  3. jacckko
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    jacckko Junior Member

    I would like to design a 5000 TEU ice classed container vessel capable of transiting the Arctic region.

    I have to design it on tribon m3 but i don't know the program..
    How much time have i to spend in your opinion??

    If someone of you is able to help me on tribon i can pay for the support..

    thank
     
  4. jacckko
    Joined: Nov 2010
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    jacckko Junior Member

  5. JRMacGregor
    Joined: Oct 2005
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    JRMacGregor Junior Member

    I am sorry but your requirements regardiing design are (or were) a little unclear.

    1. Do you need to design the HULL SHAPE only of the ice class container ship - perhaps for a student project ?
    2. Do you need to make some overall (not just hull shape) design studies for a student project ?
    3. Do you need to design the entire ship so that it can be built - not likely since there are no 5000 TEU shipyards in Austria

    You would need 50,000 to 100,000 manhours and a lot of experience if the answer was 3.

    Since the answer is most likely 1 or 2, you will be able to do what you need in the 100 or 200 hours which will be allocated for your student project.

    In that case I think your options will be;

    1) If your problem is 1 (and you truly need to break Arctic ice), then you should try to get a paper lines plan of an existing ice BREAKING hull. There are quite a few ice breaking TANKER designs around now. You can import the tanker/breaker shape to your hull design software and start distorting it to give the dimensions and proportions you need for a container ship (lower block coefficient if faster speed is needed).

    2a) If you do not need to BREAK Arctic ice, but just need a standard ice class, then you can just use the hull of a standard container ship. You can add extra steel in the ice belt - but the SHAPE remains unchanged in that case. There are many ice class tankers which have the same shape as standard tankers. So same logic may apply for container ship. DWT will be a bit less due to extra weight of steel on same dimensions.

    2b) Or you may want to go for DOUBLE ACTING standard ice class - in which case the vessel reverses into the ice and chops up the ice using the propeller or pod - like in the double acting tankers which are already built. In that case you will need to change the container ship stern lines a bit to accommodate the pod.
     
  6. JENO
    Joined: Mar 2009
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    JENO Junior Member

    i'm also interested.. I'm searching a tribon expert to commisionate him a DOUBLE ACTING project in tribon.. i'l pay for that.. Is there anyone interested?
     
  7. Svanen
    Joined: Nov 2012
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    Svanen New Member

    additianal cost for icebreaking class

    Dear designers and expiriences friends!

    Can you suggest smth about additional cost of container vessels with icebreaking class?

    what is usual IB-class of modern panamax containers vessels?

    thank you you quick reply!
    Regards,
     
  8. Frosty

    Frosty Previous Member

    Well this is not in my field at all (note avatar) but would it harm the thread to ask what is an ice breaker exactly what is and how does an ice breaker break ice.
     
  9. Svanen
    Joined: Nov 2012
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    Svanen New Member

    Dear Frosty...

    icebreakers are icebreakers... but some of container vessels also has higher ice class - can operate in nordic seas.
    i want to know how much more expensive they are (rough %%) and what is usual ice class of "panamax".

    thanks.
     
  10. Frosty

    Frosty Previous Member

    The point I was getting at is how does it break ice --does it ram and cut its way through ice or as I suspect it mounts the ice and its weight breaks it.

    Point in question then being is strength concentrated on the leading edge or under it.

    Is a bulbous bow an advantage.
     
  11. Tackwise
    Joined: Mar 2010
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    Tackwise Member

    I am not totally familiar with ice class rules, however I do know the following:

    In order to satisfy Ice class, vessels are to have a 'reinforced' ice belt. The ice belt being an area just above and below the normal waterline levels the ship sails with in ice.

    Also the higher the ice class the higher the propulsion power must be installed on board, as well as a stronger propeller.

    There are more regulations, however based on the above two you can conclude that a higher ice class will bring higher costs! How much higher for a container vessel, cannot be estimated without more information on type of vessel, construction method, length breadth volume etc. as all these factors influence the requirements of the ice class.
     
  12. Tackwise
    Joined: Mar 2010
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    Tackwise Member

    Frosty,
    Ice Class:
    You have ice breakers and regular vessels with ice class. The reasons for vessels with ice class is that they are better at sailing through frozen waters, but do not necessarily (depending ice class) need to break the ice. In the Batlic Sea the ice coverage is predicted and is broadcast to all vessels whereby a minimum ice class and deadweight will be issued per region. Vessels which fulfill the minimum ice class and deadweight may sail into these regions. Should they get stuck in the ice they will be freed by an ice breaker.

    However should you venture into a region without complying to the minimum ice class and deadweight you will be placed at the bottom of the list and you will only be freed if all other vessels have been freed first. (my advice don't do this at the beginning of winter or you may have a very long wait :D !!!)

    Ice Breakers:
    You have several different methods of breaking the ice. I know of the following three methods:
    1) The ice breaker slides on top of the ice and the vessels weight crushes the ice.
    2) a bulbous bow will push the ice upwards from underneath thereby breaking the ice.
    3) The vessel will turn around and will start shredding the ice using its propellers.
     
    Last edited: Nov 20, 2012
  13. Frosty

    Frosty Previous Member

    QUOTE=Tackwise;
    3) The vessel will turn around and will start shredding the ice using its propellers./QUOTE


    You gotta be kidding --is it April the 1st?
     
  14. SamSam
    Joined: Feb 2005
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    SamSam Senior Member

    This has nothing to do with the project but I imagine the consequences of breaking up the Arctic Ice Pack won't be good for the earth. It seems kind of like all the canals and ditches dug to drain the Everglades, except that this will end up 'draining' the Arctic of ice.
     

  15. Tackwise
    Joined: Mar 2010
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    Tackwise Member

    Someone showed me a video of a ship biting its way through the ice using its propellers some time ago. I have been searching the web for something similar with no success.

    I have found data of ships which have an ice breaking stern shape, which when in ice turn around and travel through the ice backwards. However no mention of the propeller being used for this function..

    This makes me doubt the video I saw, I do remember it was an impressive sight.
     
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