The process of making noise reduction shell panels is indeed not difficult. It is nothing more than attaching two layers of asbestos cloth into the steel frame, then fixing it with a metal mesh, then laying two layers of wool felt on it, then covering it with a cotton mesh, and finally welding a few metal columns to reinforce it, and then welding the outer layer of metal is done.

As for those pumice slabs, after the noise reduction shell is completed, it is laid on the inside of the shell wall with cement or gypsum, which can not only block the transmission of noise, but also play a role in aesthetic decoration. Of course, fire protection and moisture resistance are also one of the factors considered.

In short, this so-called noise reduction shell is a typical representative of the craft of eating ingredients but not eating.

It is really difficult to say that it is difficult, because until the 21st century, countries have made considerable investment in this regard to find materials that can be more sound-proof and noise-reducing so that their ships can travel more quietly on the ocean.

It is indeed simple to say that it is simple, with a sandwich-style sandwich structure and a simple fixed mode that can be played by just a little training.

So after all, the same thing is the saying, basic materials are the king!

Meng Jianye was moved, but now he was unrealistic to let him do these things. First, he didn't understand those things, and second, conditions allowed, so he could only take it step by step. Maybe it would happen that day.

Now, the construction of the cruise ship in front of us has made a good start, but Meng Jianye didn't believe it. He made the cruise ship stable and quiet, so those leaders are not moved. As long as they are moved, it is easy to deal with it. We will take the basics with the flow.

This is called market demand driving industrial progress, and moistening things silently!

Sun Hongjie and Zhen Jia did not have Meng Jianye's mind and vision. The noise reduction shell in front of them had already opened their eyes. So as soon as Meng Jianye covered up, the two of them started to take action with them. Not to mention that these people have a good understanding, they have basically mastered the manufacturing method after trying it a few times.

So the manufacturing work of the engine noise reduction shell began calmly.

As for the effect, it is naturally unexpectedly good. In the third power and transmission assembly test, the total noise of the two 240-horsepower diesel engines equipped with a series double-layer shock absorber and noise reduction shell was only 125 decibels.

This value looks quite high, but you must know that the transmission shaft and propeller are exposed to the air, and the engine compartment also has the entire hull structure to offset the noise, so it is normal for this noise to be too high.

If the entire system is installed in the cruise ship, the noise index can only be reduced by 25%, which is about 90 decibels.

This value is close to the sound of a motorcycle starting, which is very quiet for a cruise ship with two 240 horsepower diesel engines. If the pumice stone decorative materials installed on the outer walls of several key cabins of the cruise ship are added, the noise inside will drop to about 55 decibels.

This value is only slightly louder than the "buzzing" sound of the refrigerator, and basically does not affect speech and communication. This is the result of the full operation of two 240 horsepower diesel engines. If you only use economic speed and run slowly, the decibels will be reduced by 20%. At this time, as long as you cannot listen, you will not notice the sound of the ship's mechanical power.

The engine's shock absorption and noise reduction bring the entire cruise ship to a smooth operation, so that the crew members of G City who came after the New Year were a little fond of it. In their original words, driving this boat is like a bamboo pole that supports the hometown, and it is very considerate.

You should know that this is on the sea with larger waves. If you return to the inland river with stable water flow, it is estimated that the smooth effect will be better.

"To be honest, since this ship was built, I wish I could live here. Look at the grandeur here, which is several times stronger than the best hotel."

When the last sea trial was about to end and the cruise ship was about to return to the berth in the factory, Tang Chen, who was responsible for the supervision, touched the leather sofa chair on the seat and praised him with a stuttering voice.

There is no way, this boat is not only quiet and stable, but the decoration inside is also simple and luxurious. Especially in the VIP cabin where Tang Chen is located, the seats are all genuine leather sofas, the table is also made of good pine wood, and the floor is also paved with pine wood.

The wall is more practical and specially made wallpaper with a majestic picture of Huangshan Welcoming Pine. When you return to City G, you will add some small decorations, which is a perfect specification for the Great Hall of the People.

Not to mention the performance of the entire ship, but this cabin makes Tang Chen linger.

This is just a cabin. There are two similar VIP cabins in the entire boat, and the decoration styles are different. In addition to this atmospheric VIP cabin, there is also a VIP cabin with the theme of G City ethnic characteristics, and a VIP cabin with a warm style.

This setting up takes into account the consultations and talks, which also demonstrates the unique humanistic characteristics of City G, and also takes into account the needs of female guests. It can be said that all aspects have been taken care of.

"We can't even make this little idea, but we're afraid that City G will say we're fancy and messing around!" Jiao Dalin saw that Tang Chen wanted to move his family to the boat, and his smile became even brighter, but his words were very modest. Tang Chen waved his hand when he heard this:

"Director Jiao, don't bury yourself. Just rely on these three VIP cabins. If our city leaders are not satisfied, you twist my head off as a chamber pot. This creativity is absolutely amazing. I can't find a second one in the country several times. To be honest, Xiao Meng's head in your factory is really admirable."

Tang Chen is heartfelt. He has been to other shipyards. He has never seen more than twenty so-called luxury cruise ships, but none of them are so meticulous and gorgeous. Especially the VIP cabin next door that shows the national characteristics of City G, it is simply a stroke of genius.

If a foreign guest comes in, while feeling the unique humanistic atmosphere of City G and listening to the detailed explanations of the accompanying staff, then the picture will be very proud.

So much so that Tang Chen thought that 200,000 yuan per cruise ship was too cheap, and adding 200,000 yuan was worth it.

Fortunately, Jiao Dalin didn’t know what Tang Chen was thinking, otherwise he would definitely be slapping his thighs and howling wildly. NM, the price is lower again!

So Jiao Dalin just pretended to be humble and said: "What creativity is not creative? Xiao Meng just came up with this method based on the living rooms of the provincial capitals of the Great Hall of the People. He learned so much, just ask the leaders of City G to not make jokes."
Chapter completed!