Lou Tingyu was a little depressed, he actually didn't want to take this job, but there was no way to take it, after all, he was not working in the previous research institute now, but a technical consultant specially hired by a private enterprise, don't look at Lou Tingyu's name is very literary and artistic, but he is already sixty and six this year, and he is over the age of huā, he was an expert in ship power in a research institute before, and later after retirement, there were originally many national research institutes rehired, but Lou Tingyu still chose a private company after the most reluctance.

It's not that Lou Tingyu doesn't want to contribute to the country, but Lou Tingyu has his own considerations, in terms of these manufacturing industries, what is not as good as Europe and the United States, is because the competitive environment is too poor, and there is no good competition between private enterprises and state-owned companies in China, and what is the state unit like, Lou Tingyu has seen it for decades.

This is also the reason why he chose a private enterprise, although he may not be able to change anything, but can drive private enterprises a little bit, it can be said that his Ronghai Heavy Industry can develop into the largest private company in the domestic shipbuilding enterprises, Lou Tingyu is indispensable!

However, he is not a technical consultant who came to Ronghai to accompany the children to play at home, this is still Chairman Wei's instructions, Lou Tingyu agreed to come and try, one is to see Chairman Wei's face, and the other is to see Lulu's face, Lulu, this little girl, can also be regarded as Lou Tingyu watched grow up, quite cute little girl, and her mouth is also sweet, Lou Tingyu only has a grandson and no granddaughter, which is also one of the main reasons why he agreed to operate this absurd thing.

However, although the test has not yet begun, Lou Tingyu has probably guessed the test result, isn't this nonsense? A company with a total asset strength of only 20 million RMB wants to study the sound attenuation tiles used on submarines? And it is also known as the top level in the world? If it were that easy, the first generation of domestic nuclear submarines would not have so many shortcomings!

Thinking of the day and night when he was studying nuclear submarines, Lou Tingyu couldn't help but sigh with emotion, he was really old, at that time, he was not the main research leader, but he was also one of the experts, and he came here today precisely because he used to be an expert in submarines, although he was only an expert in ship power, but he had never eaten pork, and he had seen pigs run, and he had stayed in that secret research institute for more than ten years. Silencer tiles happen to be one of them.

Looking at the familiar test scene in front of him, although it was more advanced than the equipment back then, Lou Tingyu was still a little embarrassed, originally thought that he would never have the opportunity to touch the submarine again, but he didn't expect that there would be such an opportunity, although it was just to help a group of foolish children make an experiment.

It is very simple to test the silencing tile, use the produced silencing tile, make a simulated submarine model, and then put a generator inside the submarine model, and use the simulated sonar in the test environment, and reduce the model for testing compared with the same period, this is not simple, this submarine model is not the same as the submarine model that can be purchased casually on the Internet, this submarine model can be said to be, in addition to the innermost boat structure, the external shell, the silencing tile, and the structure, as well as the hull data, All made on the basis of one-to-one data from the first generation of nuclear submarines!

The results of this test can be said to be exactly the same as the data installed on the actual submarine with the silencer tile, and it is false to say that it is not nervous, which is related to the future of the Venus Manufactory and Starfall. This time, Lulu's mother is really helpful, you must know that just for this test, the manufacture of this model submarine, and the related test costs, huā fee's funds are close to 1.2 million RMB!

This number is very scary, the entire submarine model except for the structure in the hull, and some additional systems, all the others are no different from the real submarine, and some of the titanium alloy parts on the nuclear submarine are made of titanium alloy parts. There is no such technical Venus, only Ronghai Heavy Industry, the largest private shipbuilding enterprise in China, has such a perfect laboratory, including this underwater testing laboratory.

The entire test area is about the size of a swimming pool, twenty meters wide, fifty meters long, and eleven meters deep! Active sonars are installed in various parts of the pool, and two towed sonars are laid on a 50-metre length, as well as other equipment that simulates the marine environment, and even some small fish are placed in it.

"How? Confident? Lou Tingyu smiled and looked at Yang Yiwei and the others who were full of nervousness, although he was actually quite helpless in his heart, and he needed to accompany a group of children to play here, but Lou Tingyu did not show it on the surface, Lou Tingyu understood that these young people are the future, and it is good that they have such ideas! It's a bit naïve, but as long as you take action, you need support and encouragement!

"Xie Lu Xie Lou, I have confidence!" Yang Yiwei nodded heavily! The background noise of the ocean is about 90 to 110 decibels, and now the water noise in this test area has reached this noise with the assistance of various instruments, and the original minimum noise of the earliest domestic first-generation nuclear submarine is about 140 decibels, which is basically no different from the target now.

The main test is the performance of the silocating tile at low speed, as well as the performance of the silocating tile at complete stationary. There is no need to test it at high speeds, because the propellers of the first generation of submarines, as well as nuclear power and other technologies are not yet mature, so the noise generated by the propellers is very large.

There are two test ships, one is modified from Yang Yiwei's silencing tile, and the other is a model that is reduced year-on-year according to the original prototype.

Hearing Yang Yiwei's answer so simply, Lou Tingyu also smiled and nodded, having confidence is a good thing, this is the vigor and sharpness of young people, it is not good if it is not sharp enough, and proper training will help make these young people more mature, thinking of this, Lou Tingyu directly said loudly to everyone: "Now the test starts and prepares for the countdown of 20 seconds!" ”

With Lou Tingyu's announcement, the other staff quickly began to prepare, and the countdown also quickly began to time, Yang Yiwei's location was completely isolated from the experimental site, because the noise they emitted might affect the data of the experimental instrument.

When the countdown reached zero, the test in the test area began immediately, and the first submarine to start was a prototype model, and the first thing to detect was the ability of the towed sonar to detect it. As we all know, the most powerful detection capability of a submarine is passive sonar, and sometimes towed sonar of several kilometers, or even more than ten kilometers, is the most sensitive ear of the submarine, and even active sonar cannot be compared.

Although the towed sonar laid on both sides of the edge of the test area is not the most advanced in China, it is definitely a product that has just been withdrawn, and it is used to detect the first-generation nuclear submarine decades ago, which makes it have nothing to hide. The propeller of the model does not produce the same sound as a real submarine propeller, but it is replaced by a sound generator mounted on the outside of the tail of the hull, so the test results are also very accurate.

In fact, the test of this submarine is completely meaningless, even at low speeds, but it simply cannot escape the detection of passive sonar at such a close distance.

Soon, it was the turn to modify the model of the new silencing tile of the star pendant, when the model entered the water, at a slow speed, in order to maximize the effect of the test of the silencing tile, the noise generated by the sound generator at the tail of the propeller is set in accordance with the most advanced propeller noise in the world, so that it can be tested. At this moment, there will also be sound generators inside the hull to simulate the sound made by the submariners inside, as well as the sound of the submarine's internal instruments, and so on.

"Huh?!" The data could be seen from the screen at that time, although there was no hope for Yang Yiwei's test, but Lou Tingyu still looked at the test data very seriously, this is a work attitude, and it has nothing to do with believing or not. But when this real-time test data came out, Lou Tingyu let out a sigh of surprise.

The passive sonar arranged in the test area is connected to standard submarine equipment, and the instrument responsible for recording passive sonar data is also a clever computer! So the data can't be fake, but Lou Tingyu's eyes widened suddenly, and the passive sonar still detected the submarine model modified with silocating tiles, but at this distance, only a few dozen meters, the submarine model of any country in the world will be found.

But when I found out, the recorded sound frequency and decibel size were different! And now Lou Tingyu originally thought that it would be better to be stronger than the silencer tile of the first generation of submarines, but now he suddenly saw hope! Now the data obtained is far more than the silencer tile of the first generation of submarines! When the two submarines were captured by passive sonar, there were sound generators in the hull to simulate the sound of the crew, and ordinary people spoke at about 50 to 60 decibels, and for the test, the sound of the hull was amplified to about 100 decibels.

But at this distance, the first prototype model, captured by passive sonar, the measured decibels are still about 95 decibels, according to computer calculations. That is to say, at a distance of passive sonar, the role of the original silencing tile of the first generation of nuclear submarines is almost negligible.

But Yang Yiwei, the submarine, detected the internal sound number of the hull, which is very amazing, 70 decibels! The effect of the silencing tile reduces the sound inside the submarine by 30 decibels! You must know that the passive sonar is now only a dozen meters away from the submarine! That's a staggering number! Even if it is equipped with the latest technology, the detection of decibels will definitely not exceed 85 according to Lou Tingyu's estimation!

"The second test!" This one couldn't test anything at all, and Lou Tingyu, who was originally just holding an attitude of encouraging young people, suddenly had a kind of fanaticism on his face, just like when he was studying the first generation of nuclear submarines for the design and finalization! At this time, he ignored Yang Yiwei and the others at all.

The second test is the most direct effect of testing the effect of passive sonar! This time it is the detection effect of active sonar simulating the launch of torpedoes from enemy submarines! (To be continued)