.In fact, although the request made by the senior management was a bit abrupt, after careful consideration, he could understand some of their difficulties.

Since the existence of nuclear bombs and long-range missiles, it means that several nuclear powers have the strategic advantage of killing thousands of miles away and winning the tent. However, land-based ballistic nuclear missiles have obvious targets and are prone to being able to understand the location of the opponent. Exposing the location means that they may lose their nuclear deterrence capabilities.

It is precisely for this reason that everyone has set their sights on the seabed. Intercontinental nuclear missiles fired by nuclear submarines are obviously a greater threat to the enemy country. These nuclear killers cruising at the bottom of the ocean are difficult to capture their whereabouts, and they have the opportunity to approach the enemy country as close as possible. Therefore, nuclear submarines have become the only magic weapon to maintain a country's nuclear deterrence capabilities.

Especially for nuclear powers with very small territory like Britain, there is no place on land that can build nuclear bomb bases. Therefore, they have long been thinking about the seabed and used advanced nuclear submarines to maintain their status as a nuclear power unshakable.

Not long ago, the British Navy showed the public the structural diagram of the first alert-class nuclear-powered attack submarine. In front of the journalists who were approved for visiting, British naval officials boasted that this was the first newly built nuclear submarine in the past two decades and the most concealed submarine in the world so far.

Next, the British Navy plans to build eight-sensitivity-class nuclear submarines to replace all active fast-class nuclear submarines and some "Trafalgar"-class nuclear submarines.

Due to the special combat mode, submarines need to hide for a long time and cruise in the deep ocean. Therefore, stealth performance has become the main factor in whether submarines can survive in a complex and cruel marine war environment. There are two things that submarines can improve stealth performance. One is to reduce the noise level of the submarine itself, the other is to reduce the reflectivity of the submarine to radar wave and sonar detection, and the infrared and magnetic characteristics of the submarine.

It is said that the British "Agility" class nuclear submarine, which is about to start construction, has been equipped with a water jet propulsion device. It is the world's first submarine that does not use propellers to propel. The elimination of propeller noise greatly improves its anti-reconnaissance capabilities, making the noise generated during navigation smaller than the movement of a small whale, only from ninety to one hundred decibels.

In terms of nuclear submarine stealth technology, the United States has always been at the forefront of the world's military powers. The noise of American submarines has always been relatively low. The noise of Los Angeles-class nuclear submarines is 128 decibels. The noise of Ohio-class nuclear submarines and Seawolf-class attack nuclear submarines has dropped to 100 to 1100, which is very close to the noise level of the natural ocean.

In order to improve stealth, the U.S. Navy's Ohio-class nuclear-powered ballistic missile submarine uses a natural circulation pressurized water reactor on the boat, that is, the main circulation pump can be used during medium and low navigation, thereby reducing mechanical noise. The mechanical devices on the submarine use floating raft shock absorbers, and other noise-proof shields are installed on other noise-prone equipment on the boat, and sound-silencing tiles are applied outside the boat. In addition, this class of boats also adopts stealth measures such as eliminating infrared characteristics, eliminating magnetism, and reducing waste emissions.

For Russian submarines, they have fully realized the sound tileization of submarines, that is, all nuclear submarines are equipped with sound tile equipment developed and produced by Russia. Therefore, the noise of Russian submarines has dropped to about 115 decibels.

For the cash Kursk, the surface of the hull is laid with a second-generation sound silo of 150 mm thickness, and unique technologies such as high-dampening materials to make propellers, air curtain noise reduction, titanium alloy steel to make hulls, and the installation of anti-sound sound source systems, making its stealth capability stronger. It is said that it can reach less than 100 decibels, and it is difficult for the enemy to see it in water or space.

China's nuclear submarine technology has always been a mystery. Experts from some Western military columns speculate that China has developed a shark skin technology for the shell surface imitation of shark skin, that is, a sound-silencing tiles made using bionics principles and similar to the shark skin structure, so that China's new submarines can not only significantly absorb the noise generated by the submarine itself, but also absorb and weaken the enemy's sonar detection sound; +, and can compete with military powers such as the United States, Britain and Russia in the field of submarine stealth.

However, Fan Wubing expressed some doubts about this. Some Western statements are always exaggerated. He himself is quite familiar with some domestic situations, so he does not think that this imitation shark skin technology is very authentic. Otherwise, he would not have to find an opportunity to get some skin of the Kursk.

Currently, the most popular bionic technology is mainly used in nuclear submarines. One is the improvement of pong force, and the other is the improvement of outer skin technology. The improvement of power is mainly to learn from Wujian.

Squid is known as a rocket in the water. Its body looks like a rocket. When it advances, its tail moves forward, and its head and tentacles are stacked together to form a streamlined shape. Its movement organ is a funnel-shaped tube under the abdomen. When its tail moves forward, its head and tentacles tightly produce a huge reaction force, and move forward quickly like a rocket.

The squid's water-squirting thruster is a good power device. It allows squids to usually advance 70 kilometers per hour, and the maximum can even reach 150 kilometers per hour. As long as the position of the relevant parts of the nozzle is changed, the squid can move forward and retreat freely.

Submarines stealth in the vast ocean. If a water-squirting thruster like a squid is installed in the submarine and water is sprayed out from the stern of the submarine through the jet tube, it can rely on powerful reaction forces to push the hull forward, and its propulsion efficiency will be far beyond the propeller.

In fact, the alert-class nuclear submarines built by the British Navy use this power technology, but they have not yet been formed, and no one can be sure of their effect and whether they can be as excellent as imagined. However, if this technology is achieved, the noise of the alert-class nuclear submarine will definitely be astonishingly small.

As for the outer shell of nuclear submarines, the various characteristics of dolphins are generally used to improve the submarine's degree, performance and safety factor. Dolphins are swimmers in the sea, and can reach about 50 kilometers when swimming. It has such a high swimming, but it consumes little power, which saves both effort and fast. There are two main reasons: one is its streamlined body shape, and the other is its special skin structure.

The magnitude of resistance to moving objects in water is related to the liquid flow structure around the object. If the so-called laminar flow is formed without vortex, the resistance of the water is minimal. Otherwise, turbulence will be caused, and the resistance will increase and affect the degree.

The dolphin's slewing body and smooth epidermis cause serious turbulence. The special skin structure of rain can also turn turbulence into laminar flow, thereby greatly reducing the friction resistance of water.

The dolphin's epidermis is a sponge structure, with many mastoids, and the mastoids are filled with liquid. This structure is functionally like countless thin tubes filled with fluid. When the skin surface is subjected to turbulent pressure changes, the fluid flows out or into the thin tubes as this pressure changes.

During this process, part of the energy of the turbulent flow is absorbed, thus turning the turbulent flow into laminar flow. If the artificial dolphin skin is imitated into an artificial dolphin skin, it is made into a smooth and soft epidermal layer, an elastic dermis layer and a support layer in contact with the deck. If this artificial dolphin skin is wrapped on the surface of the torpedo, the water resistance to the torpedo will be reduced by about half.

Currently, scientists have studied the sound-silencing tiles of submarines based on the dolphin principle. They are made of rubber, about 30 mm thick and have a cavity of about 3.5 mm in diameter inside.

Its working principle is actually not complicated. It mainly uses sound waves to oscillate in the cavity to reduce the reflection intensity of sound waves and achieve the purpose of invisibility.

First, it can absorb the sonar waves from the opponent's active radar, that is, use the damping effect of the sound absolute tile material and the action of the cavity or filler in the watt to change the shape of the sound emitted by the opponent, converting the sound energy into heat energy and dissipating it, thereby greatly reducing the refracted sound wave energy, achieving the purpose of drastically reducing the active sonar detection.

Secondly, it can isolate the noise inside the submarine to radiate outward. Noise is a taboo in submarine operations, especially the nuclear submarine has a large tonnage, large size and noise, which is easier to detect and detect at extremely long distances by the other party. The sound-silencing tiles can partially alleviate this contradiction.

The layers of noise-silencing tiles on the submarine are like wrapping a radio with a cotton jacket, and the sound is significantly weakened. In this case, the noise radiation in the boat is naturally greatly suppressed.

Therefore, imitating the special skin structure of dolphins, the sound-silent tiles are fully combined with bionic skin similar to the skin structure of dolphins. The new generation of submarine shells developed can make the submarines have greater effects.

According to the latest information, the Kursk's outer skin uses this most advanced bionic technology, so the senior management specifically explained that Fan Wubing must find a way to get some samples, which is very important for domestic researchers.

Fan Wubing also intended to do it at this time, but according to the situation in the past two days, the tight guard on the scene made him feel a little incapable of starting. Moreover, among the divers who could get close to the target, they were all foreigners, and there was no way out here!

It is impossible to get the salvaged items, unless you dive into the water yourself, or it is possible to do this.
Chapter completed!