After calming down a little, Rui Xiaoting divided the entire model into three parts according to Chang Haonan's suggestion, selected method 2 and hit the enter key.

"Hoo ......"

Looking at the program running log that flashed across the screen, he breathed a sigh of relief and leaned back in his chair.

Everything that happened this morning went much smoother than expected.

It even makes people feel a slight sense of unreality.

Just now, the sun shining in from the window was close to noon, reflecting on the faces of several people.

Rui Xiaoting looked up at the wall clock next to him-

According to his experience, most of the computers in the school computer room show the era time of UNIX TIME, that is, January 1, 1970.

At ten o'clock in the morning, it was almost time for dinner.

"Director Chang, do you want to go out for dinner together?"

He asked Chang Haonan next to him:

"You have helped so much this time, I have to give a chance to express my gratitude, when I came from the airport before, I saw a good restaurant on the road, and I came to treat you."

Originally, Rui Xiaoting applied to the school for a 10-15 day mid-term business trip before coming to Beijing, and specially vaccinated with the finance and said that it might be further extended, but with the current efficiency, it may not even be able to use 10 days.

"Have you eaten...... Don't be in a hurry, let's get down to business first, and it's not too late to go when we can run the simulation of the dynamics of the full artillery launch. ”

"Of course we have to do business, but now this work is idle, and how can I get ...... from gridding"

Speaking of this, Rui Xiaoting's voice stopped abruptly.

He noticed that the estimate of the number of grids had been completed on the screen, and he began to calculate the coarse grids.

In his experience, this preparation process alone often takes one to two hours or more.

And that's in the past......

Five minutes?

If you estimate it at scale, it will probably take 30-40 minutes to complete the entire meshing process.

It's really not enough to go out for a meal.

However, Rui Xiaoting now is no longer the same as just now.

He evolved.

Rui Xiaoting made up her mind that she couldn't be surprised by some trivial things.

Otherwise, it will look like Grandma Liu entering the Grand View Garden.

He doesn't care about himself, the main thing is that he can't embarrass the school.

Chang Haonan's side had already achieved Amway's goal and did not continue to speak.

However, in the midst of this tacit silence, there was a voice that was extremely harsh:

"Teacher Rui, how did the progress of this grid go so fast?"

The graduate student, who had been in a state of confusion for almost all the time, finally waited for a part that he could fully understand.

Then he almost subconsciously let out such an exclamation.

“……”

For a moment, Rui Xiaoting regretted that in order not to delay the progress of the project as much as possible, he did not bring the most stable old doctor in the research group.

Half an hour later, about the same time as Rui Xiaoting had just estimated, the program gave a hint that "meshing completed".

And then ...... You can directly simulate the whole car, right? ”

To be on the safe side, he made another confirmation.

"That's right, and I just deduced the manosome you imported into it...... The discrete time transfer matrix method for multi-body systems, which should be used for natural frequency analysis of linear time-varying control systems, just because my software supports the forced continuous iteration function, so you can even directly simulate the overall situation of the whole vehicle when firing continuously, without having to calculate each launch separately. ”

As a continuous launch weapon, the contact stiffness between the ground and the tires, the mass of the pitching body and its distribution during the launch process change with the change of the number of rockets on the cradle. In particular, the mass of the rocket is large, and the mass and distribution of the rocket artillery have changed greatly compared with the unloaded and fully loaded, so the influence of the mass change on the dynamic response of the multiple launch rocket must be considered.

In addition, for the weapon system under the elastic support theory, when the next bullet is launched, the vibration caused by the previous bullet has not completely stopped, which is equivalent to adding a new vibration signature to the original vibration signature, and the later the projectile order, the greater the influence of this aspect, so the time interval between each two launches of rocket artillery will have a slight difference, and the firing sequence is also strictly regulated, not according to the order of the directional tube.

In order to ensure the accuracy of the simulation results, it is often necessary to manually determine and calibrate the results after the calculation of one launch, and then iterate into the next launch.

And Chang Haonan solved this pain point.

However, for Rui Xiaoting, he first focused on another place:

"Director Chang, I don't know if this result is you...... When was it deduced? ”

Just kidding, all three of them stayed together this morning.

"Just now, when I was waiting for the grid, half an hour is enough to think of something."

"But I can't figure it out......"

The graduate student next to him blurted out, but the second half of the sentence was held back by his tutor's knife-like gaze.

Rui Xiaoting said in her heart that not only can't you think of it, but if I can't figure it out without relying on the computer, don't embarrass our school......

It wasn't until the simulation process officially began that he gradually came back to his senses.

For long-range rocket artillery, due to the limited number of directional tubes, the advantage of fully automatic iterative calculation is actually not large, at most, there is no need to send someone to watch in front of the computer.

However, as the cradle of almost all artillery systems in China, Jinling University of Science and Technology has undertaken far more research and development projects.

Not to mention anything else, the small-caliber rapid-fire anti-aircraft gun currently under development has a rate of fire of up to 1,100 rounds per minute.

As for the multi-barreled close-in defense guns that the Navy desperately needs......

Ahem.

Thinking of this, Rui Xiaoting took out a notebook from his pocket, tore a page from it, and quickly wrote down his office phone number and address:

"Chang Gong, I will leave you a contact information, and when the trial version comes out, you must notify me as soon as possible."

He made up his mind that he couldn't just be embarrassed here, but he also had to let others experience this feeling of broken Dao heart after he went back.

Chang Haonan took it, folded it and stuffed it into his wallet:

"No problem, I promise, your school will definitely be one of the first trial customers, and if needed, I can also provide a video version of the tutorial CD."

"Thank you so much."

Rui Xiaoting still has a calm face on the surface:

"In addition, I think that after getting the trial version, we can hold a series of special lectures for the brother colleges and universities in Jinling, which should play a good role in promotion."

……

At the same time, in AS City, Guizhou Province, Yunma factory.

Sun Huizhong was on the laptop in front of him to do the last check of the documents before departure.

Behind him, a full-size wooden model that had just been completed was parked.

Although other sister organizations have increasingly begun to increase the proportion of digital work in the design and even manufacturing process, for Guihang, which has relatively limited conditions, many tasks still need to be completed using the old methods.

For example, they now only have limited aerodynamic computing power, so if they want to test the installation of various equipment inside the aircraft, they still have to get a wooden prototype.

The aeronautical engineers who have entered their factory over the years, not to mention how well they have learned how to design aircraft, have basically improved their carpentry skills rapidly.

Of course, it was not without its benefits, and the furniture produced by Yunma Factory helped them through the most difficult period from the late 80s to the early 90s.

Compared with the Jianjiao 7 originally produced by Guihang, this aircraft is much more advanced in terms of appearance.

At least it's no longer a nose intake.

Thanks to the valuable nose space being freed up, the cockpit space has also been greatly released, especially the forward vision of the instructor in the back seat, which is so good that the pilots in charge of the test flight of the Jianjiao 7 in the factory have praised it again and again.

At this time, another person ran to Sun Huizhong's side out of breath, took out two brown paper envelopes from his arms and handed them to him:

"The thick one is your travel expenses this time, and the thin one is the photo of the model."

Lin Haijun, the general manager of Guihang.

Although his name has the word navy in his name, he has never seen the sea in his life, and after graduating from Bingcheng Engineering University in the early years, he was in full swing in the third-line construction, and he was assigned to the mountains of Guizhou Province.

"So thick? You don't need that much money, do you? ”

Sun Huizhong said and opened a crack to check it a little, but found that there were a lot of 10 yuan or even 5 yuan in change.

It's thick to the touch, but it's not much money

"After the factory has paid everyone's basic living allowance this month, there is really not much money in the account."

The person who came wiped the sweat on his forehead because of running, and his face was a little embarrassed:

"Fortunately, the county is quite supportive of us, and I have made up some for us, but I have more change......

Sun Huizhong, who heard this answer, also looked pale.

On this trip, he almost shouldered the life and death of the entire group.

If Guihang falls, these cadres may be assigned to other places, and the worst thing is to be a cold bench, but the workers in the factory, as well as the many industries surrounding Guihang in several surrounding counties and towns, are obviously more than lucky.

The economy of Guizhou Province is not very developed, and I am afraid that it will not be able to withstand such a toss.

Lin Haijun looked at the aircraft design drawing on the computer screen in front of Sun Huizhong, and always felt as if something was missing.

If this model is successful, it should be named Coach 9 according to the naming rules.

However, in the design stage of the manufacturer, it will generally have its own internal code.

At present, it is set at FTC2000.

It means "a combat trainer aircraft produced by Huaxia for the 2000s." ”

Future export models will also be called this.

But this cold number numbering still seems to be almost meaningless.

"I said, old grandson, this design we came up with still has to have a nice name, right?"

"Hmmm......"

Sun Huizhong put down the mouse, lowered his head and paced back and forth a few times.

"This plane took off from our mountain, so let's call it 'Mountain Eagle'."

(End of chapter)