Chen Xindao: "Steel hammer, the silencing tile is made of rubber, can you handle it?"

The steel hammer jumped out of Chen Xin's body with a smoke, and said with a smile: "Old Dou, the material problem is easy to solve, have you ever heard of metal rubber?"

"Metal rubber, what metal rubber?"

"The so-called metal rubber is actually a homogeneous elastic porous substance, which is formed by a certain process method to orderly discharge a certain quality, stretched, and spiral metal wire in a stamping (or rolling) die, and then formed by cold stamping method. Its raw material is metal wire, which has both the inherent characteristics of the selected metal and the elasticity like rubber, so it is called metal rubber. ”

The hammer picks out a piece of stainless steel metal from the corner of the room, the scrap of food it has eaten.

Then, its body suddenly dissolved like mercury, and then a shiny silver wire was drawn from the liquid, and quickly solidified in a spiral and coiled together, and in less than a minute, the steel hammer disappeared and was replaced by a metal ring.

Its skin is tan in color, and its appearance is somewhat like a normal plastic packaging shell, which does not look much different from ordinary metal materials.

called: "Old Bean, you try the feel." ”

Chen Xin picked it up and held it lightly with his hand, except that it was a little heavier, it felt similar to ordinary rubber, but the elastic effect was indeed very good.

said: "Old bean, don't look at its inconspicuous appearance, it can be stretched 2 to 3 times under the action of external force, and then return to its original shape; The material retains its metallic characteristics and conductivity, it is as invulnerable as metal, whether it is placed in jet fuel or acetone liquid, it remains intact without corrosion, structural or chemical degradation, and it can not burn at temperatures as high as 700 degrees Fahrenheit or as low as -167 degrees Fahrenheit, and its structure is very stable. ”

Chen Xin is very keenly aware that this material is not ordinary, if it can really achieve the characteristics of the steel hammer, then the future aircraft can have wings that can be flapped like birds, the future airline seats will be extremely comfortable, and even the TV can be made flat and soft, and can be folded up and put in the pocket......

Chen Xin frowned and said, "Steel hammer." This material is used to make anechoic tiles. That's a waste, isn't it?"

The steel hammer quacked and said, "Who said you were going to use it as a silencing tile?"

Chen Xin was slightly stunned and said, "If you don't make a silencing tile, what do you do?"

The steel hammer flashed an electronic eye and said, "Artificial sharkskin!"

Chen Xin was slightly stunned. "Artificial sharkskin?"

said: "Old beans." You should know how biomimicry works. Biomimicists have long been inspired by fish, and the British have produced a veneer material for speedboats, modeled after dolphin skin. In the middle of the two layers of rubber there are countless small rubber columns, and the voids are filled with a liquid. Stick it to the surface of the speedboat that touches the water, and when the speedboat is sailing at high speed, the flow of water against the hull is smooth, which can increase the speed. ”

After a pause, he continued, "The skin of the great white shark is full of small vertical spines (fishermen can use shark skin to polish wood), and the planes of these small spines all follow the flow of water. As the great white shark moves forward at high speed, the water that adheres to the skin forms a laminar flow along these small spines, greatly reducing the resistance of the water. The so-called artificial shark skin can be manufactured by this principle! I have done simulation calculations, in addition to reducing drag, artificial shark skin also has a very high noise reduction effect. From the software simulations, it can be confirmed that the vibrations (noise) inside the hull are transmitted to the hull, and when they pass through this honeycomb-like heterogeneous interface (the speed of sound propagation in steel and rubber varies greatly), most of it is absorbed, and some of it disappears in the water flow near the hull in a diffuse form due to the action of small spines, which is more effective than the silencing tiles. ”

Chen Xin was dumbfounded when he heard this, if what the steel hammer said was true, then the artificial shark skin was too important for the Chinese Navy.

As we all know, the great function of a submarine is its concealment.

The cost of a Kilo-class submarine is roughly equivalent to $400 million for a "Modern" class guided missile destroyer, but its firepower is completely incomparable with that of a guided missile destroyer, and its value lies in its extreme concealment.

The propagation of sound in the sea is completely different from in the air, and the background noise in the ocean is up to 90 decibels. The noise emitted by the Kilo-class submarines when diving at economic speeds is close to this level. It has been praised by Western military experts as a "black hole" in the ocean.

The initial submarine noise of China's Type 091 Han-class attack nuclear submarine and 092 Xia-class missile nuclear submarine was as high as 160 decibels and 165 decibels, and it is still as high as 150 and 155 decibels after years of improvement.

American military experts once quipped: "The PLA's nuclear submarines from the GZ can be heard in Saigon, Vietnam." ”

The new 093-class attack nuclear submarines and 094-class ballistic missile nuclear submarines have been reduced to 125 and 130 decibels respectively, but they are still far from the 120 decibels of the "Los Angeles" class attack nuclear submarines of the United States, the 95 decibels of the "Seawolf" and "Virginia" class nuclear submarines, and the 100 decibels of the "Ohio" class ballistic missile nuclear submarines.

For today's sonar jishu, for every 15 decibels of noise, the detection range is reduced to 50%-70%. This shows the great significance of the submarine silent jishu.

If the Chinese Navy's 093-class attack nuclear submarines and 094 can be equipped with artificial sharkskins, it will greatly improve China's strategic nuclear deterrence capability.

If China's 094 nuclear submarine departs from the SY base on HN Island and enters the Pacific Ocean through the Bass Strait, it will be difficult for the US Navy to monitor the trajectory of the Chinese Navy's strategic nuclear submarines.

In the event of a shijie nuclear war, China could even have the ability to launch a nuclear counterattack on the west coast of the United States.

Chen Xin said excitedly: "Steel hammer, this thing is too against the sky, no, you must raise the price, you prepare the relevant information first, and then give some samples to the other party, I don't believe that the military is not impressed!! right, is this thing easy to replace? How about the lifespan?"

Generally, like ordinary silic tiles, the most difficult thing is not in the preparation of materials, but in how to cover the steel surface of the submarine with the silencing tiles.

According to Chen Xin's understanding, the silencing tile is usually fixed with bolts first, then plugged with filler, and then brushed with a layer of paint, and the process is very complicated.

Gangyi said: "Don't worry, don't forget that the material of artificial shark skin is metal rubber, which has a very good affinity with the surface of the steel body of the submarine, which is easy to bond together and not easy to fall off." In addition, due to the electrical conductivity of metal rubber, we can even control the state of artificial sharkskin in different navigation conditions by using electric current, so as to reduce navigation resistance and submarine noise as much as possible. (To be continued......)