Chapter 715 Sorry, I just figured it out too
"How about this compensation? Is it satisfactory?"
Ding Gaoheng crossed his legs with a smile on his face.
Chang Haonan is still a layman after all, and he never denies this.
“I’m so satisfied, thank you to the organization for their unconditional trust in me!”
Therefore, facing this rocket-like speed of promotion, he did not hide his happiness:
At this time, hiding and pretending to be deep seemed too deliberate.
It is a good thing that the city is deep, but it may not necessarily be seen that the city is deep.
“Don’t put a high hat on the organization.”
Ding Gaoheng waved his hand:
"The trust of the organization is also gradually increasing. It is impossible to entrust important tasks just because of one or two things, or the recommendation of one or two people. Especially in your case, it is definitely an exceptional promotion, so although you have not reached the level, you are still in the middle management Sequence, the final appointment must be made after comprehensive consideration.”
“Moreover, the position given to you is a chief planner who is usually not established separately, rather than a deputy in charge of a certain business. General Manager, considering your age, you have no experience in directly managing a very large organization yet, and you need to practice for a while with the Torch Group."
"If my guess is correct, the slowest is three. Within this year, or as soon as the end of this year or next year, the Torch Group may be subsumed under the Aviation Development Group.”
Chang Haonan was also involved in the aviation industry in his previous life, so he naturally knows the gold content:
“When Chief of Staff Fu said it before, I was thinking that it might take a while to cool down, but I didn’t expect it would happen so soon...”
"It can be considered as cooling down. There are still three months until I officially start my job."
Ding Gaoheng said half-jokingly:
"Besides, if you don't get a doctoral diploma this year, this The appointment will automatically expire..."
At this point, the two people facing each other laughed.
The results Chang Haonan has made in the past two years, even if only the non-confidential parts are shown, are enough for at least dozens of Ph.D.s to graduate successfully.
As for why it is stated that he was appointed on July 1, 1999, it is easy to understand.
First of all, the Aviation Power Group is still in the preparatory stage. There is currently only one preparatory leadership group, and July 1 is the day of the official inauguration.
The second is that he is a member of the team directly under the state-owned enterprise, and he is even a central management cadre from the appointment level. It is impossible to simply give him the title of "agent" and be in charge of the work like the Torch Group.
So I have to wait until I officially graduate.
……
The sudden appointment at the department and bureau level did not bring much change to Chang Haonan's daily work.
After finishing all the matters before graduation, he returned to Jiangcheng again, preparing to follow up on the trial production of the heavy-duty die forging press.
The hardware installation of the die forging press body has been basically completed, but the trial production is not only about starting up the equipment, but also to produce a complete and usable product according to the process requirements.
"Mr. Chang, as usual, trial production usually involves building an ordinary C-beam or other partition frame structure with a relatively simple shape."
Including Chang Haonan, the die forging press Several leaders of the project team wore safety helmets and walked beside the forging press, which was as grand as a tall building. The speaker was Yan Yongnian, who was holding an engineering drawing in his hand:
"However, when our forging press is put into trial production, there should be many leaders, including senior leaders, coming, and I heard that Airbus has also applied to send people to visit. Many of them are experts. If it is just Producing a workpiece that is the same as other hydraulic presses will not fully reflect the power of our equipment."
Chang Haonan nodded to express his understanding:
"So I have contacted Factory 112. They have said over there that they will send the latest structural design results and the process parameters of the rear fuselage frame of a fighter jet, and we will conduct trial production. Of course, if the trial production process goes well, it will be transferred to formal production immediately. Stage. ”
The design of the second-generation Flanker improved airframe with internal number 9902/803 was completed at the beginning of the year and will be used in the 112th factory and all subsequent Su-27s produced by the Komsomolsk factory. Improved type.
The only exception is that Russia cannot sell models using this second-generation airframe to countries surrounding China.
Compared with the first-generation improved airframe that only carried out structural reinforcement and added a pair of inner wing mounting points, it is basically equivalent to resetting the structural design of the aircraft while retaining the aerodynamic shape. Through more reasonable The weight reduction design is suitable for lighter radars such as 1493 or Beetle, and a retractable aerial refueling device and fuel supply pipeline are reserved at the nose position to support the installation of fuel liquid cooling equipment.
However, the new body involves several key integrated die-cast parts, a large number of titanium fasteners and a larger proportion of composite material application area. For China, there are certain production technical barriers.
For this reason, the No. 803 verification machine used to test the 9902/803 airframe was completely produced by Gongqingcheng, but the test data was shared by both parties.
But if you want to mass-produce the fully upgraded J-11B, these difficulties must be overcome.
"If this is the case, the look and feel of the trial production will be much better, but there may be foreigners among the visitors, which will not be good..."
"Don't worry about this."
As he spoke, Chang Haonan had already led a group of people back from the production workshop to the nearby process research and development center, and sat down in a conference room:
"Visiting the production process is just a long-distance view at the entrance of the production workshop. Let alone the control room, even the equipment itself is impossible for them to get close to. The production process cannot be deciphered by just looking at it from a distance." Then there is no problem on my side. The equipment software and hardware are all normal at present, and the remaining debugging work needs to wait until the car is started."
Yan Yongnian put down the folder in his hand.
Chang Haonan's eyes turned to the other side:
"Then... Professor Lin Jingtang from the forging process group will introduce the development of the titanium alloy isothermal forging forming process."
Forging process The group has a special position in the die forging press project team. They only joined in the middle of last year and are relatively independent in business. The focus of their research is not the die forging press equipment itself, but how to use the new equipment to produce Parts that meet process requirements.
But when they were dismissed, the equipment itself was often still under construction, so their research was always suspected of being slightly divorced from actual production, and it was not taken very seriously before they participated in the development of die forging presses.
Fortunately, Chang Haonan himself has a background in numerical calculations and understands the importance of process flow calculations, so he added them to the team midway through the project.
"Okay, Mr. Chang."
Lin Jingtang nodded, then connected the laptop he brought with him to the projector, and began to introduce his research results:
"The actual problem of metal plastic forming The above is a boundary value problem. For rigid viscoplastic materials, the boundary value problem can be described as: at a certain stage of the quasi-static deformation process, the geometry of the deformation body, the internal temperature distribution, the uneven state of deformation and The current material parameters, the velocity vector on the velocity surface and the surface force on the elevation surface are given at the same time. The solution to this problem is the solution of the stress field and velocity field that satisfies the basic equations and boundary value conditions of plastic mechanics. . ”
“In previous research, we found that materials that satisfy the rigid viscoplasticity assumption obey the Mises yield criterion and its associated flow criterion during the molding process. In the velocity field, the real velocity field will always minimize the total potential energy of the deformed body. "
"From a mathematical perspective, it is equivalent to solving a functional minimum with volume incompressibility constraints. This is also the theoretical basis for all subsequent numerical calculations of metal forging and forming processes.”
"..."
"We have currently submitted a calculation application to the Institute of Computing Technology of the Academy of Sciences. Regarding the aircraft partition that Mr. Chang just mentioned, if the volume is not particularly exaggerated, it is estimated that it will take about 3-4 months to calculate. Once the results are out, we should be able to make a gift for the 50th anniversary before the National Day..."
"..."
Chang Haonan listened very patiently to Lin Jingtang's introduction to his research content. .
It should be said that the idea is still relatively new.
Especially the part that uses Makarov's variational principle to solve the molding problem of rigid viscoplastic materials.
However, Chang Haonan frowned slightly after hearing the end.
Of course the other party’s solution cannot be wrong.
Just not clever enough.
So it takes 3-4 months.
"Professor Lin, regarding the problem of solving the functional minimum, I have put forward an idea. Of course, there is no guarantee that it will be correct. You can try it."
Chang Haonan looked at the page full of formulas on the curtain and thought. After a while, he stood up, pulled out a drawing board, and scribbled on it:
"In the actual calculation process, it should be difficult to find a velocity field that satisfies both the velocity boundary and the volume incompressibility condition. Found, but the volume incompressibility condition can be introduced into the functional, changing it from a functional with constraints to a new functional without constraints. "
"For example, if in By introducing a Lagrange multiplier λ into functional 27 on your PPT, you can get a new functional that is easy to solve by variation."
"..."
"Of course, there may be many specific volume invariance conditions. For example, introducing a penalty function should have a similar effect. I won't repeat it again..."
Lin Jingtang's expression was relaxed at first, and then solemn.
Then came the sudden enlightenment.
Finally it’s back to ease.
After his expression changed like a revolving lantern, he slapped his thigh suddenly and made a crisp sound:
"I didn't expect Mr. Chang to also conduct research in metal plastic forming... If we had known this earlier, we should have discussed it with you before entering into research and development..."
Hearing this, Chang Haonan quickly waved his hand:< br>
“I have no research on your topic, I just have some opinions on the mathematical topics of solving functionals and strongly nonlinear partial differential equations...”
Lin Jingtang frowned and found out Things are not simple:
"Then... what you wrote."
"Ahem——"
Chang Haonan put down the pen in his hand:
"I just came up with it while listening to your introduction...a little bit of insight, a little bit of advice, a bit of advice..."
(End of this chapter)