The military-industrial scientific research system of the academic master.

"A geological question?"

This is completely Chang Haonan's knowledge blind spot.

Although it is said that all engineering problems can ultimately return to physical problems and then be reduced to mathematical problems.

But this does not mean that mathematicians can solve all engineering problems in one step.

Even a master like Chang Haonan, who has rich theoretical knowledge and engineering experience, must first learn basic knowledge when faced with problems he does not understand.

Or let people analyze the essence of the problem.

So he thought for a moment and asked:

"Can you be more specific? What type of geological problem?"

"At least I have to know the research object clearly."

"Wait a moment……"

Zhu Lan said as she fumbled around in her jacket pocket for a while and took out a small notebook.

After all, this is Lin Guofan's problem, not her professional direction.

"The research project is...'Vibration response and cumulative permanent deformation of permafrost sites under the load of heavy-duty trains'. The research objects include various unfavorable frozen soils including instability of the water and heat balance conditions of permafrost, changes in the upper limit of frozen soil, etc." High temperature and extremely unstable permafrost areas including phenomena..."

reasonable.

The name of this kind of project made Chang Haonan nod his head when he heard it. It was impossible for Zhu Lan, who was not a professional, to remember it without a notebook.

However, the key points are not difficult to get.

Frozen soil and trains.

The two keywords added together may not mean anything to people of this era, but for Chang Haonan who has returned from rebirth, it is not difficult to guess where this project is aimed at.

Of course, having said that, you still have to be sure, otherwise it will be like jumping to the top.

"Are you planning to build a railway in XZ?"

Zhu Lan shook her head:

"This is what my old Lin told me last night when he called me. Because it was an outside call, I didn't mention anything in detail."

"Then let's take it as such for now."

Chang Haonan already had an estimate in his mind, and he just asked casually. No matter how Zhu Lan answered, he would definitely continue:

"From a theoretical perspective, this problem is probably a composite problem of the temperature field, the stress field inside the frozen soil layer, and the pressure field of external dynamic loads."

"Because these three fields are basically completely independent, the numerical solution of the strongly nonlinear partial differential equations will eventually be implemented, which is exactly what the TORCH Multiphysics software is good at, although the calculation process will be more troublesome."

Upon hearing Chang Haonan's judgment, Zhu Lan's eyes lit up:

"In other words... it should be feasible?"

“I can’t say it’s directly feasible.”

Chang Haonan lowered his head and organized his words:

"There are no obstacles at the solution level of the core set of partial differential equations, but at the operational level, if a railway is really thousands of kilometers long, even if only part of the permafrost layer is studied, there will be at least a research scope of hundreds of kilometers. Then it is impossible to solve it as a closed-domain problem like a general problem."

"Whether it is the finite element method or the finite volume method that is commonly used at present, if you calculate an open domain problem, you must impose truncation boundary conditions. You can consider constructing an interpolation shape function in the local coordinate system, such as Bettess element and Astley element, or directly in Construct interpolation shape functions in the global coordinate system, such as Burnett elements..."

Having said this, Chang Haonan felt that these proper nouns might be a bit unfamiliar, so he changed the topic and asked:

"Do you need me to write these functions for you?"

But Zhu Lan shook his head:

"No, I study surface physics. I have some understanding of what you are talking about. It should be regarded as the infinite element method..."

"Surface Physics..."

Hearing this, Chang Haonan suddenly became energetic:

"Professor Zhu, our company is currently studying the dynamic model of microscopic particles on the surface of metal materials during the grinding process. I wonder if you are interested in participating?"

Originally, Chang Haonan should have finished talking about the current matter before starting the next topic.

However, high-precision abrasive belt grinding will have a great impact on the production efficiency and yield rate of turbofan 10 after it enters mass production in the future. It is one of the core technologies in the third-generation aviation production process.

After all, Chang Haonan himself is not an expert in this field. If he really has to learn it all by himself, it will take some time.

What the Turbofan 10 project lacks most is time.

Even if the finalization cannot be completed, Chang Haonan still hopes to advance the engine to a state of high enough stability before October 99.

Let third-generation fighter jets equipped with domestic engines, even prototypes, participate in the military parade!

Now Zhu Lan's level is definitely high enough and reliable enough. If he can be brought over to lead the project, it will not only advance the research progress, but also be equivalent to finding a teacher for Chang Haonan himself.

No matter how you look at it, you kill two birds with one stone.

So I asked immediately.

Zhu Lan was stunned by this question.

Chang Haonan saw that the other party was worried about the distance between Jincheng and Beijing, so he continued:

"As for the salary issue, you can rest assured that all your expenses in Beijing and the round-trip air tickets from Jincheng to Beijing will be taken care of by us, and we can also give you an additional subsidy based on the basic salary standard of a senior researcher in our group. "

Torch Group is a state-owned enterprise, and the company's money is not Chang Haonan's own money anyway. In addition, there are only a small number of people in the company, so he basically doesn't hesitate to offer benefits.

In this era, the treatment of scientific researchers is generally relatively average.

Especially for research institutions in relatively remote locations like Jincheng University.

Even if Lin Guofan and Zhu Lan are both full senior professors, their lives can only be described as average.

Facts have proven that adding money really works.

"I have to discuss this matter with our old Lin, but... it shouldn't be a big problem."

Zhu Lan thought for a while, and although he did not give a direct answer, his tone and expression were basically stable.

"That's good. Our group is in urgent need of reliable fresh blood, and we really need talents like Professor Zhu to join us."

Chang Haonan's on-site poaching not only made Zhu Lan a little confused, but also almost confused the other people at the same table.

However, universities do not restrict faculty members from taking part-time jobs outside the school, so there is really no problem.

After a small interlude, Zhu Lan and Chang Haonan remembered the topic they had just talked about halfway.

"By the way, the infinite element method I just mentioned..."

Zhu Lan picked up the pen again, preparing to record what Chang Haonan said next.

But the latter waved his hand directly:

"Since you understand the idea of ​​the infinite element method, there is nothing more to say. We cannot immediately upgrade to a new version for this less commonly used method, but we can develop an external toolkit for the infinite element method through the reserved interface. .”

"Just think of it as part of the cooperation with Professor Zhu joining our research project."

Chang Haonan said this, obviously continuing to increase the demands he just made——

Ms. Zhu, you don’t want your husband to have no useful tools for his research project, right?

cough cough...

Zhu Lan, who was opposite, had no objection to this. After all, apart from the need for a long business trip, she would at least not lose money.

"Then on behalf of my husband, I would like to thank Mr. Chang in advance for his help."

Zhu Lan said as she put her pen and notebook into her pocket.

The dinner party was almost about to begin. She wanted to say goodbye and leave, but something suddenly occurred to her:

"By the way, Mr. Chang, what is the name of your project? This needs to be reported to our school."

"Study on the micromechanics of the material surface removed during belt grinding."