Strong as Ice: Designing Icebreaker Hull Structure
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- Опубликовано: 10 июн 2024
- With icebreakers, the hull becomes the primary tool. The massive wedge we use to crack open mountains. All this, despite it being a hollow tin can, with an average density lighter than the very ice it cracks through. How to build an unbreakable hull?
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References
[1] Wikipedia Authors, "Polar Class," Wikipedia, 15 Dec 2022. [Online]. Available: en.wikipedia.org/wiki/Polar_C.... [Accessed 13 Mar 2023].
[2] US Coast Guard, "Major Icebreakers of the World, Explanatory Piece," USCG office of Waterways and Ocean Policy, Washgington, D.C., USA, 2017.
[3] ABS, "Part 6: Specialized Items and Systems," in Rules for Building and Classing Marine Vessels, Houston, TX, American Bureau of Shipping, Jan 2023, p. 19.
[4] S. L. Planisek, Icebreaker Mackinaw, 2nd. Edition, Mackinaw City, MI: Great Lakes Lighthouse Keepers Association, 2008.
[5] Shigley, Mechanical Engineering Design, 10th Ed., New York, NY, USA: McGraw-Hill, 2014.
[6] YENA Engineering, "Ductile-Brittle Transition Temperature and Impact Energy Tests," YENA Engineering, [Online]. Available: yenaengineering.nl/ductile-br.... [Accessed 13 Mar 2023].
[7] Wikipedia Authors, "Projectil Deflection Effects," Wikimedia Commons, 16 Jun 2010. [Online]. Available: commons.wikimedia.org/wiki/Fi.... [Accessed 13 Mar 2023]. 
Наука
RUclips suddenly suggested this video. It was quite interesting, thank you
That's how I came across this channel a couple years ago. Good stuff, nerdout.
Thanks for the video! I enjoyed having this float across my recommended videos feed. I noticed that the audio seems to be just a little bit ahead of the video. Maybe a quarter second or so. The script writing, images, transitions, and everything else are great; just that little desync. 🙂
Yeah. I'm still mastering my skills as a video editor.
Nice
Thanks for the video!
Since were on the topic of breaking ice. Can you make a video about ice strengthened ships? Ships with a seemingly traditional hull designs but have an ice class rating. Whenever I try to look up information about them, a lot of the information is more on purpose built icebreakers.
In terms of structure, ice strengthened ships are designed the same as an icebreaker. We use the same standards for ice strengthened ship. We just design for a much lighter ice pack. (Usually PC 6 or 7, which equates to summer ice.) We also reinforce the rudder and propeller on an ice strengthened ship.
The main difference between an ice strengthened ship vs an ice breaker: On an ice strengthened ship, the additional ice requirements are small enough that we just increase the thickness of the structure. Thicker hull plating, bigger stiffeners. But we leave the hull shape optimized for open water. On an ice breaker, the ice loads become so big that we can't get away with that. We need to optimize the shape of the ice breaker for ice breaking. Otherwise, the hull would need ridiculously thick steel and be too heavy.
@@DatawaveMarineSolutions Thanks for the information!
What about lifting ice and causing the weight of the ice to break itself?
Not just using the bow shape, but thrusters.
The reason some icebreakers use thrusters at the front or back throw heavier ice.
Or weight on the ice such as hovercraft to break the ice allowing a following ice breaker to clear the ice to the sides.
There are cases where hovercraft are used to break ice. It works.
It's very interesting but a point regards the camera work. Don't listen to RUclips about filming you from an angle. It's distracting at best. You are facing to the side, instinctively people are going to wonder *what* you are looking at. It works if you are addressing something on the screen but otherwise it doesn't.
YT seems to advise everyone to do these trick camera angles.
A pet hate of mine too. It's rude not to look at the people to whom you're talking, and it breaks the illusion that we are being spoken to. What do people who do this see when they watch their own videos?
Please, think of the kittens!
Do you do any consulting for smaller catamaran sailboat designs, or is a smaller project not worth your time?
I do a fair amount of small projects. I actually like the smaller ships. Send me an email and we can talk details. sales@dmsonline.us
Random curiosity... I found a cargo plane at an airport for sale and was wondering if it is feasible to take the wings off and turn them leading edge down to make the twin hulls of a catamaran, using the rest of the plane in the construction of the cabin living quarters etc.?
Probably not. The pressures on the airplane are lower than typical hydrostatic and wave pressures. The plane could probably survive in calm water. But at the first violent storm, I suspect ocean waves will start to dent and buckle the skin of the wings.
Would it be possible to make a sailing tanker? I have this idea of shipping water from the mouth of the Amazon to the Sahara, but I suspect fuel cost would make it infeasible, but that it might be with sails. Also is there any benefit to a catamaran if it is very heavy? Would the increased righting moment and hull fineness make up for the increased wetted surface compared to a monohull of the same displacement?
Sailing tankers are definitely possible. Several companies are currently researching modern sails to retrofit onto existing freighters and tankers.
But . . . Water as a cargo is probably too low of a price to justify the shipping cost. At least for now. Probably cheaper to desalinate the water onsite
And yes, there are benefits to a heavy catamaran. As you said, the increased righting moment adds a lot of sail capacity.
@@DatawaveMarineSolutions thanks. Yesterday I spoke to the manager of a Mississippi river port about the possibility of building ships there and he said that the port owns enough land and he's not opposed to the idea. He said that his main concern was with insurance
Damn it man - slopped armour goes back to Classical times. Get it bloody right.
Edited to add: RCGS Resolute 1, Venezuelan Navy 0.
If you like Naval History I recommend Drachinifel's channel 🙂
@@SideshowBen206
I’ve been into naval history far longer than Drach. But damn does he shine as an expositor. Been a Patreon of his for years.