Chapter 853 New Domestic Frigate
What surprised Chang Haonan was that the 2# shipyard was indeed quite different from the "shipyard" in his past concept.
Not only is it hidden under the roof, it is even completely on the ground some distance from the seaside.
It is not difficult to see from the surrounding structures that after the boat is built, it must pass through a specific slide rail before it can be launched into the water.
This design determines that this #2 shipyard cannot build ships that are too large.
Of course, the advantage is that not only can you be wary of satellite reconnaissance from overhead, but even ships passing by the channel cannot see what is going on inside the dock.
Perhaps noticing the strange look in Chang Haonan's eyes, Lin Qing explained:
"Originally, if the traditional tower shipbuilding method was used, the dock would have to be placed on the shore. However, the nearby Jiangnan Factory began to introduce segmented shipbuilding when building 052. Hudong hopes to practice this on 054, so it specially built the No. 2 dock on the ground. "
"At that time, the Hudong Factory was producing an improved 053H2G frigate for the Pakistan Navy. The original plan was to replace the No. 4 ship with a new technology, but in 1998, you know the international situation changed. They are relatively large, so the first three ships were transferred to our navy, and the No. 4 ship was not built..."
The "053H2G modification" Lin Qing said is actually 053H3.
In 1998, India and Pakistan conducted multiple rounds of intensive nuclear tests, resulting in both sides being subjected to severe embargo sanctions -
Whether sanctions are effective depends on the reasons for the sanctions and the target objects. What is it.
Aircrafts like the J-7F, or some small ground equipment can also be transported secretly.
But against the sanctions resolution that you voted for, you delivered a frigate in an open and honest manner...
This matter is completely riding on the face of the Security Council.
Even Americans can't do it.
At that time, the Chinese navy was in urgent need of combat power, so it was exported directly to domestic sales.
However, the situation on this timeline is still a little different from the previous life.
Because the design of 054 was frozen in 1999, and the cost is much lower than that of the previous generation 054, which required a lot of imported parts from Europe.
So the originally planned second batch of 053H3 was directly cut off and converted to the current fully combustion-powered version of the new frigate.
Chang Haonan followed Lin Qing's introduction and walked into the slightly mysterious No. 2 dock.
As soon as you enter the door, you can see a warship that has begun to take shape parked on the slipway in the center of the dock.
Although the former does not know the detailed design plan of 054, he has seen the renderings.
No matter how bad it is, a ship with a conventional layout cannot do any tricks.
The reason why it is said to be "initially taking shape" is that only about two-thirds of the front of the ship is complete at this time, while the rear third is divided into two segments and has not yet followed the owner. The hull is docked.
This is characteristic of the segmented shipbuilding method.
First install most of the equipment into the ship structure, and then assemble it.
The advantage of this is that multiple sections can be started simultaneously and assembled in a unified manner at the end. The shipbuilding efficiency is much faster than the tower shipbuilding method.
The 054 first ship started cutting steel plates in October last year. It only took about 10 months for the hull to be basically completed.
Next, we only need to carry out the outfitting of some ship surface equipment, and the sea trial process can begin in about half a year.
Even for a small ship with a volume of less than 4,000 tons, it is quite efficient.
Of course the price is that there is almost no fault tolerance.
If the error of a certain segment is slightly larger and cannot be aligned with other hulls, then the only way is to rework it.
"It just so happens that the section that will be closed soon is near the power cabin."
Everyone came to a relatively high operating platform, and Lin Qing pointed to a section at the bottom of the cabin. Said to Chang Haonan at the position:
"There are two QC130 gas turbines, as well as the entire power system including the reduction gearbox."
While saying this, a staff member from behind handed over a telescope at the right time. . Although Chang Haonan was deeply involved in the research and development of the turbojet 14 itself, because when the QC/QD130 was developed, the turbofan 10 project was already in progress, so he did not actually know much about the situation after the combustion change.
Fortunately, Lin Qing and another engineer named Liu who was responsible for shipbuilding were always there to cooperate with the introduction.
Where is the flue, where is the air inlet, and where is the fuel pipeline...
As well as shock-absorbing rafts arranged to further enhance anti-submarine capabilities, and exhaust ejector devices specially designed to suppress the infrared signature of the ship...
It can be said that although it is only a type with relatively strict cost restrictions frigates, but the shipbuilding industry system still cooperates with the aviation industry system to use some cost-effective technologies that can improve combat effectiveness as much as possible.
In addition to improving the combat effectiveness of this class of ships as much as possible, it is more important to pave the way for new domestic destroyers that have also entered the planning stage.
The only problem is that the gas turbine itself will cost more to use than a diesel engine.
However, since the 054 directly chooses full-combustion power in one step, and it is not even a combination of combustion and combustion, then Yan Zhongcheng must have made some tilt towards fuel consumption in terms of performance trade-offs.
"What was the result of the previous test of QC130 on the dynamic test platform?"
When Lin Qing finished a sentence, Chang Haonan suddenly asked.
When the Aviation Power Group was established last year, he once drew three pieces of pie.
One of them is to develop a 30MW class marine gas turbine based on the turbofan 10 core engine, which will be used in future domestic destroyers.
Two gas turbines of this level can drive an 8,000-ton destroyer, and if four are used, it can power a 12,000-ton or higher destroyer.
If you want to do a good job in aviation modification, you must refer to the feedback given by some users.
“There is nothing wrong with the gas turbine itself.”
Lin Qing replied:
“Size, weight, output power, mean time between failures and fuel consumption are all important factors. Within the initial design specification range, only the noise and vibration levels were slightly increased in order to compromise with fuel consumption. However, no matter how large it is, it is still several levels better than a diesel engine..."
" The current main problem is actually the same as that of the two 052s. Our navy has almost never equipped fully-combustion-powered warships in the past, so neither the crew nor the shipyard are very accustomed to the maintenance, overhaul, and maintenance of gas engines. ”
"Especially after each voyage, or when a malfunction occurs, because gas turbines are more complex than diesel engines, inspection and maintenance time will take about two to three times longer, but these can be gradually overcome through training... ”
In fact, to sum up, although I don’t like bad things, it will be more troublesome if they are broken.
Hearing this, Chang Haonan suddenly had a flash of inspiration and looked at Lei Zhixing and Liu Fangping, who had been following behind him:
“The set of equipment we developed for the LNG ship previously was used for condition monitoring and Should the automatic fault diagnosis (ECM&FD) system be transplanted to this frigate?”
After Chang Haonan developed the available manifold learning algorithm, the first application scenario that came to mind was risk and fault diagnosis. .
However, this requires a large number of sensors to provide data. Based on the technical level in 2000, it is difficult for aircraft, at least small and medium-sized aircraft, to meet this requirement.
So this system was first used on LNG ships——
The complete reliquefaction system of boil-off gas will affect the structural design of the entire ship, even for Gas- with safety redundancy. Transport cargo tanks still face certain risks.
If the core data of the entire ship, including cargo tanks, power systems and hull structures, are integrated into the new system, this risk can be estimated in advance.
For example, if a valve on the ship is at risk of failure due to disrepair or improper installation, it will have a certain impact on the pipeline pressure data of the upstream and downstream, and even the entire ship.
In the past, it would have been difficult to find this effect amid massive amounts of data noise using manual verification alone.
It is often necessary to wait until the valve really fails before we can make amends.
But with the ability to extract data, targeted early prevention becomes possible.
Similar systems seem to be able to be installed on warships after simple debugging.
It may be too costly to apply it to the whole ship like LNG ships, but it is not a big problem to only use it for the power system.
In this way, the man-hours consumed in the maintenance process will be greatly reduced, and the risk of failure will also be reduced accordingly.
From the perspective of the cost of the whole life cycle, it is definitely a profit without losing money.
(End of this chapter)