What is the dive depth of the submarine?

The limit depth of submarine dive, also known as the maximum dive depth, is the maximum dive depth allowed by the compressive strength of submarine hull, and the submarine can only stay at this depth for a limited short time.

In addition, the depth of calculating the hull strength during submarine design is called design depth. Usually, it is 1.3 ~ 1.5 times of the limit depth, so as to ensure that underwater weapons still have certain survivability when they explode near the submarine or the submarine exceeds the limit depth. During World War I, the maximum dive depth of submarine was about 60 ~ 70 meters; Increased to 200 meters during World War II; After the war, it was generally 300 ~ 400 meters, and some reached more than 900 meters. Ordinary conventional power submarines are generally 250-350 meters deep.

Some double-hulled nuclear submarines can dive to a depth of 500 meters. The main measures to increase the diving depth of submarine are to adopt high-strength steel and titanium alloy, new welding technology and pressure-resistant structure suitable for deep diving. In fact, no matter how deep it is, it doesn't make sense. Every depth of 1 m may increase several tons of steel, which is not worth the loss. Because the submarine noise at this depth has made most in-service sonar unable to detect the submarine.

nuclear power

Nuclear power is another power after diesel power. The principle of nuclear power is to generate steam in the steam engine through the high temperature generated by the nuclear reactor, and then drive the steam turbine to drive the propeller or generator to generate electricity.

The first submarine to successfully install a nuclear reactor was the US Navy's Nautilus submarine. There are five countries in the world that openly claim to have nuclear power, among which the United States and Russia have the highest proportion of use. The United States even announced in 1958 that it would no longer build non-nuclear submarines.

The first submarine to successfully install a nuclear reactor was the US Navy's Nautilus submarine. There are five countries in the world that openly claim to have nuclear power, among which the United States and Russia have the highest proportion of use. The United States even announced in 1958 that it would no longer build non-nuclear submarines.

Compared with traditional diesel-electric submarines, nuclear-powered submarines have the advantages of large power output, high power endurance (because the fuel replacement of nuclear-powered submarines is usually more than 10 years, which is greatly increased compared with diesel-electric submarines with only a few weeks or months, it is usually regarded as infinite endurance) and high speed.

However, nuclear-powered submarines have some shortcomings, such as great technical difficulty, poor stability, high construction cost, high noise and high maintenance requirements. The emergence of nuclear batteries has solved these problems, which means that submarines with superior performance can be manufactured in batches.