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Submarines have 2 or more hulls - the superstructure, which is the visible external hull you see, and the inner pressure hull, which contains all the primary equipment and houses the crew.
The space between the superstructure and the pressure hull is where the main ballast tanks are located, as well as line lockers, access/weapons hatches, etc. The pressure hull is where the crew lives and works (and keeps on working...). The primary reason there are 2 hulls is that the pressure hull, while optimally designed for maximum sea pressure resistance, isn't designed for optimum speed and maneuverability underwater. The superstructure, built over the pressure hull, streamlines the boat and compensates for this, making modern boats extremely fast and maneuverable underwater.
The best analogy is a thermos bottle, which has an outer shell (the superstructure) that protects and insulates the inner thermal bottle (the pressure hull). The Russians are known to use a double-layered superstructure on their larger boats, the theory being to insulate the pressure hull from a torpedo attack. The problem with that theory is that modern torpedoes don't need much proximity to severely damage or sink submarine, and any significant damage
What else can I help you with?
Why might a submarine be crushed if it sinks too low in the ocean?
Submarine hulls are subject to sea pressure, and that pressure increases the deeper the submarine goes. There are design limits to the amount of pressure that a hull can take, and if that pressure is exceeded by diving too deep, the hull will fail and will be crushed.
Is the element helium used in modern submarine hulls?
yes
World War 2 submarine bow and modern submarine bows?
WWII boat shaped bows; nuclear subs have cigar shaped hulls.
What has the author Thomas J Kiernan written?
Thomas J. Kiernan has written: 'Predictions of the collapse strength of three HY-100 steel shperical hulls fabricated for the oceanographic research vehicle Alvin' -- subject(s): Hydrostatic pressure, Submersibles, Alvin (Submarine), Hulls (Naval architecture)
What was a ww1 submarine made out of?
Although the alloy composition has of course changed over the years to provide for more flexibility, submarines of WWI were pretty much made of the same stuff that modern boats are today; good old steel. Today's submarine hulls (most nations) are made of a flexible steel that contracts and expands with sea pressure, making for a much longer hull life. Some countries, such as China, use GRP (Glass Reinforced Plastic (fiberglass) for their hulls, and others like Russia, use titanium for their pressure hulls. There are advantages and disadvantages to each material.
What is used in the making of supersonic airplane wings and artificil joints for bones modern submarine hulls?
titanium
How did a submarine start?
the very first submarine was made in the revolutionary war and was designed to drill through the hulls of british ships and plant bombs but it failed all of its missions
How do submarines withstand deep sea pressure?
The simple explanation of the ability of a submarine to withstand deep sea pressure lies in the mechanical strength of the pressure hull. On modern military submarines (called boats by the crews) the pressure hull is make of steel (except in the case of a few Russian boats which used titanium). This steel basically forms a cylinder and keeps the pressure of the sea water at operating depth from crushing the hull. To gain a tactical advantage, the Russian Navy built some of their boats with titanium pressure hulls. These hulls were designed to allow greater operating depths, and, therefore, increased ability to "hide" beneath the sea. But as is the case with the steel hulls, the titanium hulls used the geometry (shape) and the mechanical strength of the pressure hull and all the fittings to keep the water out at test depth.
How can people withstand pressure in submarine?
A submarine is kept at, or close to, surface air pressure.
Can water exert pressure on a submarine?
Yes, water exerts pressure on the hull of the submarine.
Why are submarines always built with very thick and heavy metal?
The pressure hull of a submarine must withstand the pressure of water at depth. Hundreds of pounds of pressure per square inch translates into many tons of pressure around a pressure hull. If that hull doesn't have the strength to stand up to this, the pressure hull will implode. Steel is a "known quantity" as far as metals. We've used it for a long time, and we have a good handle on its characteristics. Steel alloys are extremely strong, fairly easy to fabricate, and won't double the national debt if we use this metal to make a submarine pressure hull. Steel's weldability and its common availability make it a fine choice for submarine pressure hulls. It's really strong, too. That's a big plus. No one wants to be inside the pressure hull of a submarine when it fails.
How does water pressure affect a submarine?
When a submarine goes farther down in the water, the water pressure becomes greater. If the submarine goes to far, pipes can explode and let in water, or it can implode the submarine
