After introducing the main technical characteristics and indicators of the Song-class modified submarine, Yu Tao looked at the two participants of the design unit and said with a smile: "Today, our designers are also on the scene, and everyone can raise any questions about the design of this submarine, so that everyone can know what process should be used to meet the relevant design requirements."
Now please speak freely!
” At this time, one of the two designers stood up, Shen Huan still remembered that Yu Tao had introduced just now, this person's name was Wei Liang, and he was the backbone designer of the Song-class modified submarine.
Wei Liang is a relatively young designer, only about thirty-five years old, with a pair of black-framed glasses on the bridge of his nose, which looks like the lenses are very thick, and the prescription should not be low.
Wei Liang stood up, glanced at the participants, and then said in a deep voice: "Let me talk about some of the factors we consider in the design of this type of submarine, so that it is also convenient for the comrades in the shipyard to prepare the construction process documents."
First of all, we all know that one of the most important properties of the submarine is quietness, in this regard, when we designed this type of submarine, we also had full consideration, and combined with the latest technology in China's noise reduction materials, according to the problems found in the first boat, several noise reduction measures were emphasized. ” The attendees listened attentively, some of them rustling in their notebooks.
Wei Liang continued: "The first measure is that we will adopt a domestic version of the Deguo MTU16V396SE low-noise diesel engine.
This engine has a maximum output of 3,600 horsepower and a weight of 1,800 kilograms, and this engine is used in the 209 type submarine developed by Germany, which is already relatively mature and reliable, and the noise control has reached a relatively good level, and the degree of automation is high, which has a direct effect on the quietness of the submarine. ” Shen Huan knows that this kind of diesel engine is still being localized, and the first few ships must still be used in the original way.
Wei Liang continued: "Of course, there is a good engine, and there must be a good transmission system.
In the power plant and transmission equipment, we design the use of shock-absorbing floating rafts and damping materials, including the engine, electric motor and transmission equipment are designed to be installed on the shock-absorbing floating raft, the raft body is supported on the hull by vibration isolators, so that the impact of mechanical vibration on the quietness of the submarine is minimized.
For structural vibrations, damping materials are laid on the raft, on the shock-absorbing base of the equipment, as well as on the deck and bulkhead of the power compartment.
The pipes in the boat are also connected to the hull by elastic connecting pipes as much as possible.
With these measures, noise can be reduced by about 10 decibels.
In addition, we have adopted the design of external sound-absorbing tiles, of course, which puts forward high requirements for the installation process, and I also hope that the comrades of the shipyard can make breakthroughs and innovations in the process, and successfully build our type of submarine as soon as possible, so that it can be launched into service as soon as possible.
Thank you!
” In fact, in addition to these measures, the Song-class modified submarine also uses a seven-bladed large side-inclined propeller with reduced rotational speed, which is also the first time that China has designed this new type of propeller on a conventional submarine, but this does not involve much construction and installation technology.
Although the Song-class modified submarine belongs to the second generation of conventional submarines, from the perspective of Shen Huan, a reborn, it is indeed still a little behind.
However, there is no way to do it, not that the designers can't design the shape of those advanced submarines abroad, but that the current basic industry is too weak, whether it is the power system, or the silence is not matched, even if it is a Song-class modified submarine, it has to use a diesel engine that imitates foreign products, but this engine is relatively good.
The localized MTU396 diesel engine has been completed, which can be regarded as having a Chinese heart.
Of course, don't think about the more advanced AIP engine, but the silencing tile is already there, and in addition to the uselessness of the first boat, it is now about to start to be applied!
Shen Huan didn't have a choice, because he was not engaged in submarine design, nor submarine power design, but an engineer in a shipyard, and he didn't know the details of those things.
Even if the submarine designer is reborn, it is almost impossible to come up with those advanced things at this time, because the materials will not pass.
Shen Huan really regarded himself as a member of the craft room now, although it was the first day he had just arrived, he was still the first to stand up and speak.
The core of the Jiangnan spirit is to dare to be the first in the world, Shen Huan has nothing to be afraid of, as long as he can contribute to the construction of submarines, it doesn't matter what others say.
Shen Huan stood up, which surprised many of the participants, of course, they also knew that Shen Huan was the hottest figure in Jiangnan Changxing now, so everyone was actually looking forward to his performance, especially Yu Tao and Sun Chengming, the military representative.
Shen Huan stood up and said loudly: "All of you here are experts, I just came here today, so I'm not afraid of saying the wrong joke."
I would like to make a few comments.
I believe that the vibration and noise reduction work of the submarine is not only a matter for the design unit and the equipment development unit, but also has a great impact on the final noise control level of the submarine during the construction process of the shipyard.
Therefore, I believe that in the design of submarine construction technology, the first thing is to fully consider the principle of giving priority to vibration and noise reduction technology, and improve the quiet performance of the final product in the construction process. ” As soon as Shen Huan's point of view came out, the process experts present couldn't help but nod, because this point of view is indeed reasonable, although some technological measures have been taken for vibration and noise reduction, which will increase the complexity of construction and production costs, but it is still worth it to calculate carefully.
Because the quietness of the submarine is one of the most important properties of the submarine, sometimes it may be a noise difference of one decibel, which may lead to the submarine diving underwater being discovered by the enemy, resulting in a catastrophe.
From the tactical aspect, the most important thing to improve the survivability of submarines is quietness, that is, it is equivalent to the stealth of radar by aircraft, and the quietness of submarines is equivalent to having concealment of sonar, also called stealth.
Whether it's an aircraft or a submarine, or even a surface warship, stealth is crucial.
Of course, in the nineties, this view was not widely accepted.
Especially in China, because it has been learning from the former Soviet Union, and the former Soviet Union's weapons and equipment design has given the highest priority to practical principles, and rarely considers stealth performance.
This is reflected in the design of fighters, the Soviet-made fighters have a relatively large radar reflection area, and almost no measures to reduce the radar reflection area are considered.
The same is true in the design of surface warships, such as Hyundai-class destroyers, the messy electronic equipment and weapons on the hull are huge sources of radar reflection, so the stealth is very poor.
However, on the submarine, the Russian designers seem to have recognized this, so the latest Kilo-class submarine introduced by China has changed a lot.