Wealth

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 introduction of nuclear bombs and long-range missiles, it means that several nuclear powers have the strategic advantage of killing people thousands of miles away and decisively surpassing them. However, the 6-based ballistic nuclear missiles have obvious targets and are easily touched by their opponents. Knowing the location and exposing the location also means that the nuclear deterrence capability may be lost.

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

Especially for a nuclear power with a very small territorial area like the United Kingdom, 6 there is no place on the ground to build a nuclear bomb base, so they moved their brains to the bottom of the sea a long time ago, using large and advanced nuclear submarines to maintain their status as a nuclear power. Unshakable.

Not long ago, the British Navy showed the public a schematic diagram of the first smart-class nuclear-powered attack submarine. In front of journalists who were approved to visit, British naval officials boasted that this was the first nuclear submarine newly built by Britain in the past two decades, and it was by far the most concealed submarine in the world.

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

Due to the special combat method, the submarine needs to be hidden for a long time. Cruising in the depths of the ocean. Therefore, stealth performance is a major factor in whether submarines can survive the complex and cruel marine war environment. There are two great treasures for improving the stealth performance of a submarine. One is to reduce the submarine's own noise level, the other is to reduce the submarine's reflectivity to radar waves and sonar detection, and to reduce the submarine's infrared and magnetic characteristics.

It is said that the British "Smart" class nuclear submarine, which is about to start construction, is equipped with a water jet propulsion device. It is the first submarine in the world that does not use propellers. The elimination of propeller noise greatly improves its anti-reconnaissance capabilities and makes it noise during navigation. It is smaller than the movement of a small whale, only 90 decibels to 100 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, and the noise of Ohio-class nuclear submarines and Seawolf-class attack nuclear submarines is even higher. It is down to 100 to 110 decibels, which is very close to the noise level of the natural ocean.

The US Navy’s Ohio-class nuclear-powered ballistic missile submarine uses a natural circulation pressurized water reactor on board in order to improve its stealth, that is, the main circulation pump can be omitted when navigating in low to medium ranges, thereby reducing mechanical noise. The mechanical device on the submarine uses a floating raft shock absorber, and the other noisy equipment on the boat is equipped with sound insulation and shielding, and noise-absorbing tiles are added on the outside of the hull. In addition, this class of boats also adopted stealth measures such as eliminating infrared features, eliminating magnetism, and reducing waste emissions.

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

For the cash Kursk, the second-generation anechoic tile with a thickness of 150 mm is laid on the surface of the hull, and the propellers, air curtains, and titanium alloy steel are made of high-damping materials. The unique technology such as the hull and the installation of the anti-sound source system makes its stealth ability more powerful. It is said that it can reach below 100 decibels, and it is difficult for the enemy to see it in water or space.

China’s nuclear submarine technology has always been unexamined and mysterious. Experts in some Western military columns speculate that because China has developed a shark-skin-like technology on the surface of the boat’s shell, that is, a shark-skin-like consumer made with bionic principles. Acoustic tiles enable China's new submarine to not only significantly absorb the noise generated by the submarine itself, but also absorb and weaken the enemy's sonar detection sound; +, and then compete with military powers such as the United States, Britain and Russia in the submarine stealth field .

However, Fan Wubing expressed some doubts about this. Some statements in the West are always a little exaggerated. For some domestic situations, he himself feels that he is relatively familiar with it. Therefore, he does not think the authenticity of this shark-skin technology is very high. Otherwise, you don't need to let yourself find a chance to get some Kursk skin.

At present, the more popular bionics technology is mainly used in nuclear submarines in two aspects. One is the improvement in the power of the pong, and the other is the improvement in the skin technology. The improvement in motivation is mainly to learn from Wu Jian.

The squid is called a rocket in the water. Its body is like a rocket. When moving forward, the tail is forward, and the head and tentacles are stacked together to form a streamlined shape. Its moving organ is a funnel-shaped tube under the abdomen. Its tail is forward, and its head and tentacles produce a great reaction force, like a rocket, fast forward.

The squid’s water jet is a very good power device. It allows the squid to usually move forward 70 kilometers per hour, and the highest altitude can even reach 150 kilometers per hour. Just change the position of the relevant part of the nozzle. Squid can advance and retreat freely.

The submarine is diving in the vast ocean. If a water jet like a squid is installed in the submarine, and the water is sprayed out from the tail of the submarine through the jet pipe, the hull can be pushed forward by strong reaction force. , Its propulsion effect will be far better than the propeller.

In fact, the smart-class nuclear submarine under construction by the British Navy uses this kind of power technology, but it has not yet taken shape. Everyone is not sure how effective it is, whether it is really as good as imagined. But if this technology is realized, the noise of the alert-level nuclear submarine will definitely be astonishingly small.

As for the outer skin of nuclear submarines, various characteristics of dolphins are generally used to improve the degree, performance and safety factor of submarines. Dolphins are great swimmers in the sea, and they can swim up to about 50 kilometers. It has such a high swimming, but not much power consumption. It saves energy and is fast. There are two main reasons: one is its streamlined body shape, and the other is its special skin structure.

The size of the resistance of an object moving in the water is related to the structure of the liquid flow around the object. If the so-called laminar flow is formed without the vortex, the water resistance will be the least, otherwise the turbulent flow will be caused, and the resistance will increase and affect the degree.

The fusiform body and smooth skin of the dolphin can cause severe turbulence, and its special skin structure can also turn the turbulence into laminar flow, thereby greatly reducing the frictional resistance of water.

The dolphin's epidermis is a sponge structure with many papillae, and the papillae 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 flows into the thin tubes following the pressure change.

In this process, part of the energy of the turbulent flow is absorbed, thereby turning the turbulent flow into a laminar flow. If according to the structural characteristics of the dolphin skin, it is imitated into artificial dolphin skin, made into a smooth and soft epidermis, an elastic dermis and a supporting layer in contact with the deck. If this kind of artificial dolphin skin is wrapped on the surface of the torpedo, the water resistance of the torpedo will be reduced by more than half.

At present, scientists have developed a submarine anechoic tile based on the dolphin principle. It is made of rubber, about 30 millimeters thick, and has a cavity of about 3.5 millimeters in diameter.

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

First, it can absorb the sonar wave from the other party’s active radar, that is, using the damping effect of the anechoic tile material and the role of the cavity or filling in the tile to change the shape of the sound emitted by the other party, and convert the sound energy into heat energy. Therefore, the energy of the refraction sound wave is greatly reduced, so as to achieve the purpose of drastically reducing the active sonar detection.

Secondly, it can isolate the internal noise of the submarine from radiating outward. Noise is a big taboo for submarines in underwater operations, especially nuclear submarines with large tonnage, large size, and loud noise, and they are easy to be detected by the opponent at a very long distance. The sound-absorbing tiles can partly alleviate the contradiction in this regard.

The submarine wrapped with layers of anechoic tiles ~www.wuxiamtl.com~ is equivalent to wrapping a radio with a cotton jacket, and the sound is significantly reduced. In this case, the noise inside the boat is naturally greatly suppressed.

Therefore, imitating the special skin structure of dolphins, the developed silencing tiles are fully integrated with the bionic skin similar to the dolphin skin structure, and the new generation of submarine skins developed can make the submarine more effective.

According to the latest information, the Kursk's outer skin has adopted this most advanced bionics technology. Therefore, the senior management specifically explained that Fan is not sick and must find a way to get some samples. This is very important for domestic researchers.

Fan Wubing also deliberately made this time, but based on the situation of the past two days, the on-site guards were tightly guarded, which really made him feel a little bit helpless. Besides, among the divers who can gravitate close to the target, they are all foreigners. , I can't do anything on my own side!

It is impossible to get the salvaged objects, unless you dive into the water yourself, or it is possible to accomplish this.

Just thinking about diving into such a deep seabed, Fan Wubiao felt a little unreliable. After all, the old people had said that Ning to go up the mountain and Mo down to the sea, once diving in, the following things are not easy to say. This decision is still difficult to make.