Chapter 853: New Domestic Frigate

What surprised Chang Haonan was that the 2 # dock was quite different from the "dock" he had in the past.

Not only was it hidden under the roof, it was even completely on the ground some distance away from the sea.

It was not difficult to see from the surrounding structures that after the ship was built, it had to pass through a specific slide rail to be launched into the water.

This design determined that this 2 # dock could not build ships of too large size.

Of course, the advantage is that it can not only guard against satellite reconnaissance from overhead, but even ships passing by in the channel next to it cannot see the situation inside the dock.

Perhaps noticing Chang Haonan's strange look, Lin Qing started to explain:

"Originally, if we use the traditional tower shipbuilding method, we must put the dock on the shore, but the Jiangnan Factory next door started to introduce segmented shipbuilding when building 052, and Hudong hopes to practice this on 054, so we built this 2 # dock on the ground."

"At that time, Hudong Factory was producing an improved 053H2G frigate for the Pakistani Navy. The original plan was to change the technology from the 4th ship, but in 1998, you know that the international situation changed a lot, so the first three ships were transferred to our navy, and the 4th ship was not built..."

The "053H2G modification" mentioned by Lin Qing is actually 053H3.

In 1998, India and Pakistan conducted multiple rounds of intensive nuclear tests, resulting in severe embargo sanctions on both sides--

Whether sanctions are effective depends on the reasons and targets of the sanctions.

Aircraft like the J-7F or some minor ground equipment can be transported secretly.

But in the face of the sanctions resolution that you voted in favor of, delivering a frigate openly...

This is completely exporting in the face of the Security Council.

Even the Americans can't do it.

It just so happened that the Chinese Navy was in urgent need of combat power at that time, so it was directly exported and sold domestically.

However, the situation on this timeline is still somewhat different from the previous life.

Because the design of 054 was frozen in 1999, and the cost is much lower than that of the 054 in the previous life that required a lot of European imported parts.

So the second batch of 053H3 originally planned was directly cut, and the production was switched to the current all-fuel powered version of the new frigate.

While listening to Lin Qing's introduction, Chang Haonan followed him into the slightly mysterious 2 # dock.

As soon as he entered the door, he could see a warship that had already taken shape parked on the slipway in the center of the dock.

Although the former is not clear about the detailed design of 054, he has seen the renderings after all.

At worst, a ship with a conventional layout can't do anything.

The reason why it is called "initial shape" is that only about two-thirds of the front of the ship are complete at this time, and the rear one-third is divided into two sections, which have not yet been connected to the main hull.

This is the characteristic of the segmented shipbuilding method.

Most of the equipment is first installed into the hull structure, and then assembled.

The advantage of this is that multiple sections can be started simultaneously, and finally unified and closed, and the shipbuilding efficiency is much faster than the tower shipbuilding method.

The first 054 ship started cutting steel plates in October last year. It took only about 10 months, and the hull was basically completed.

Next, as long as some ship surface equipment is installed, the sea trial process can be started 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 tolerance.

If the error of a certain section is slightly larger, so that it cannot be aligned with other hulls, then there is only one way to go, which is to rework.

"It just so happens that the section that is about to be closed is near the power cabin."

Everyone came to a relatively high operating table, and Lin Qing pointed to a position at the bottom of the cabin and said to Chang Haonan:

"There are two QC130 engines, and the entire power system including the reduction gearbox."

While saying this, a staff member behind handed over a telescope very timely.

Although Chang Haonan was deeply involved in the research and development of the turbojet 14 itself, because the turbofan 10 project was already being carried out simultaneously when the QC/QD130 was developed, he actually didn't know much about the situation after the fuel conversion.

Fortunately, Lin Qing and another engineer named Liu who was responsible for shipbuilding were always there to help introduce it.

Where is the smoke duct, where is the air intake, where is the fuel pipeline...

And the shock-absorbing rafts arranged to further enhance the anti-submarine capability, and the exhaust ejection device specially designed to suppress the infrared characteristics of the ship body...

It can be said that although it is only a frigate with strict cost constraints, 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 the new domestic destroyers that have also entered the planning stage.

The only problem is that the cost of using the gas turbine itself will be higher than that of the diesel engine.

However, since 054 directly chooses the full-fuel power in one step, and it is not even a fuel-fuel combination, then Yan Zhongcheng must have tilted 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 speaking, Chang Haonan suddenly asked.

When the Aerospace 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:

"The volume, weight, output power, mean time between failures and fuel consumption are all within the initial design specifications. Only the noise and vibration levels are slightly larger in order to compromise with fuel consumption. However, no matter how large it is, compared with diesel engines It's still a lot better than before..."

"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 it up, although I don’t like it bad, it will be troublesome if it breaks.

Hearing this, Chang Haonan suddenly had an idea and looked at Lei Zhixing and Liu Fangping who had been following him:

"Should the Equipment Condition Monitoring and Automatic Fault Diagnosis (ECM&FD) system we developed for LNG ships be transplanted to this frigate?"

After Chang Haonan developed a usable 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-Transport cargo tanks with safety redundancy, they still face certain risks.

And 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.

Often we have to wait until the valve really fails before we can make amends.

But with the ability to extract data, targeted early prevention becomes possible.

It seems that a similar system can be installed on a warship after simple debugging.

The cost of applying it to the entire ship like LNG ships may be too high, but it is not a big problem to only use it in 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 entire life cycle, it is definitely a profit without losing money.