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

As for those pumice stone slabs, after the noise reduction shell is completed, cement or gypsum is used to lay on the inside of the shell wall, which can not only block the transmission of noise, but also play a role in aesthetic decoration, of course, the effect of fire prevention and moisture prevention is also one of the factors considered.

All in all, this so-called noise-reducing shell is a typical representative of the kind of material that eats not craftsmanship.

It's really hard to say that it's difficult, because until the 21st century, countries have invested a lot in this area, just to find more soundproof and noise-reducing materials, so that their ships can sail more quietly on the ocean.

It is indeed simple to say that he is simple, with a sandwich-like sandwich structure and a simple fixed mode, which can be played by a little trained worker.

So to put it mildly, the basic material is king!

Meng Jianye sighed with emotion, it is not realistic to let him engage in these things now, firstly, he does not understand those things, and secondly, if the conditions permit, he can only take his time step by step, maybe it will come as a matter of course that day.

No, the construction of the cruise ship in front of him has made a good start, Meng Jianye doesn't believe it, he makes the cruise ship stable and quiet, those leaders are not moved, as long as they are tempted, it is easy to do, and we will pull up the basic things.

This is called market demand to promote industrial progress, moisturizing things silently!

Sun Hongjie and Zhen Jia did not have Meng Jianye's mind and vision, and the noise reduction shell in front of them had already opened their eyes, so as soon as Meng Jianye finished covering up, the two of them took two apprentices and started to do it, not to mention that the understanding of these people is not bad, and they have basically mastered the manufacturing method after a few attempts.

So the manufacture of the engine noise reduction shell began without any waves.

As for the results, it was surprisingly good, and in the third powertrain and drivetrain test, the total noise of the two 240 hp diesel engines fitted with series double shock absorbers and noise reduction shells was only 125 decibels.

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

If the entire system is installed in a cruise ship, the noise level can only be reduced by 25 percent, or about 90 decibels.

This value is close to the sound of the motorcycle starting, which is very quiet for a cruise ship with two 240 horsepower diesel engines, and if you add the pumice slab decoration materials installed on the exterior walls of several key cabins of the cruise ship, the noise inside will be reduced to about 55 decibels.

This value is only slightly louder than the "hum" sound of the refrigerator running, which basically does not affect the communication of speech, and this is the result of the full operation of two 240 horsepower diesel engines, if you only use the economic speed, slow operation, the decibel will be reduced by 20 percent, at this time, as long as you can not listen, you will not notice the sound of the ship's mechanical power.

The shock absorption and noise reduction of the engine brought about the smooth handling of the whole cruise ship, so that several crew members of G City who came over after the year were a little in love.

You must know that this is still on the surface of the sea with larger waves, and it is estimated that the effect of smoothing will be better if you return to an inland river with a stable current.

"Seriously, I've been longing to live here since the ship was built, and look at the grandeur of this place, which is several times stronger than the best hotels. ”

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 in charge of supervising the construction, touched the leather sofa chair on the seat and praised it loudly.

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 leather sofas, the tables are also made of fine pine, and the floor is also paved with pine.

The wall is more practical and the special wallpaper is pasted with a majestic picture of the welcome pine of Huangshan Mountain, and then add some small decorations when I return to G City, and the specifications of the Great Hall of the People are proper.

Let's not talk about the performance of the whole ship, but this cabin alone made Tang Chen linger.

And this is just a cabin, there are two similar VIP cabins on the whole ship, and the decoration style is 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 not only takes into account the negotiation and talks, but also highlights the unique humanistic characteristics of G City, and also takes into account the needs of female guests, which can be said to take care of all aspects.

"Our little idea can't be put on the table, I'm afraid that G City will say that we are messing around with bells and whistles!" Jiao Dalin saw Tang Chen's eagerness to move his family to the boat, and his smile was much brighter, but his words were very modest, Tang Chen waved his hand when he heard this:

"Director Jiao, don't bury yourself, just with these three VIP cabins, if the leaders of our city are not satisfied, you screw off my head as a night pot, this idea is simply amazing, I can't find a second one in the country several times, to be honest, your factory's Xiaomeng's head is really admirable." ”

Tang Chen's words can be said to be from the bottom of his heart, he has also been to other shipyards, he has never seen more than 20 so-called luxury cruise ships, and none of them are so detailed and gorgeous, especially the VIP cabin next door that shows the national characteristics of G City, it is simply a stroke of genius.

If a foreign guest enters and feels the unique humanistic atmosphere of G City, while listening to the detailed explanation of the escorts, the picture will be doubly face-saving.

So much so that Tang Chen felt that 200,000 cruise ships were too cheap, and another 200,000 was worth it.

Fortunately, Jiao Dalin didn't know Tang Chen's thoughts, otherwise he would definitely clap his thighs and howl, NM, this asking price is low again!

So Jiao Dalin just pretended to be modest and said: "What is not creative, Xiao Meng just came up with such a method by referring to the provincial capital halls of the Great Hall of the People, and he learned from the cat and the tiger, just ask the leaders of G City not to laugh at it." ”

"No, no, it's too late for them to be happy, that's probably a joke. Tang Chen was polite again and again, and immediately cast his eyes from Jiao Dalin to Meng Jianye behind him, and suddenly spoke: "This time, let Xiao Meng go with us, G City has become an acceptance evaluation expert group for the sake of safety, with Xiao Meng, the general person in charge of construction, we also have a little bottom in our hearts, right?"