"Geology questions?"

This is completely Chang Haonan's knowledge blind spot.

Although all engineering problems can eventually be reverted to physical problems, and then reduced to mathematical problems.

But that doesn't mean that mathematicians can solve all engineering problems in one step.

Even a double expert with rich theoretical knowledge and engineering experience like Chang Haonan has to learn the basic knowledge first when facing problems that he doesn't understand.

Or let people dissect the essence of the problem.

So he thought for a moment and asked:

"To be more specific, what type of geological problems?"

"At least I have to know who I'm studying."

"Wait a minute......"

Zhu Lan said and fumbled in his 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 heavy train loads', and the research object is the ...... of permafrost areas with extremely unstable high temperature and extremely unstable permafrost phenomena such as unstable hydrothermal equilibrium conditions of permafrost and changes in the upper limit of permafrost."

Plausible.

The name of this kind of project, Chang Haonan sounds a little big, and it is impossible for Zhu Lan, who is not a major, to remember it without taking a book.

However, the point is not difficult to get.

Permafrost, trains.

The two keywords added together may not be anything for people in this era, but for Chang Haonan, who was reborn and returned, it is not difficult to guess where this project is aimed at.

Of course, having said that, you still have to be sure, otherwise you will be suspected of jumping gods.

"Is this going to build a railroad in XZ?"

Zhu Lan shook her head:

"This is what my Lao Lin told me when he called last night, because it was an outside phone, so I didn't mention anything too detailed."

"Let's take it for now."

Chang Haonan already had an estimate in his heart, and he just asked casually just now, no matter how Zhu Lan answered, he would definitely continue with the trend:

"From a theoretical point of view, this problem is probably a problem of the combined effect of the temperature field, the stress field inside the permafrost layer and the pressure field applied by the external dynamic load."

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

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

That is to say...... Should it be feasible? ”

"It can't be said to be straightforward."

Chang Haonan lowered his head and organized the language:

"There is no obstacle at the level of solving the core partial differential equations, but at the operational level, if it is really a railway that is thousands of kilometers long, even if only part of the permafrost is studied, there is at least a research area of hundreds of kilometers, then it is impossible to solve it as a closed problem as a general problem."

"At present, whether it is the finite element method or the finite volume method, if the truncated boundary condition must be imposed to calculate the open domain problem, you can consider constructing the interpolation shape function in the local coordinate system, such as the Bettess element and the Astley element, or directly construct the interpolation shape function in the global coordinate system, such as the Burnett element......"

Speaking of which, Chang Haonan felt that these proper nouns might be a bit obscure, so he turned around and asked:

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

But Zhu Lan shook her head:

"No, I'm a researcher of surface physics, and I've learned about what you said, so it should be an infinite element method......

"...... Surface Physics"

Hearing this, Chang Haonan suddenly perked up:

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

Originally, Chang Haonan should have talked about the current matter before opening the next topic.

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

Chang Haonan himself is not an expert in this area after all, and if he really has to learn from scratch by himself, it will take a little time.

And the most lacking thing in the turbofan 10 project is time.

Even if it can't be finalized, Chang Haonan hopes to push the engine to a state with high stability by October 99.

Let a third-generation fighter with a domestic engine installed, even a prototype, participate in the parade!

Now Zhu Lan's level is definitely high enough, and reliable enough, if he can be pulled over to preside over the project, he can not only promote the progress of the research, but also be equivalent to finding a teacher for Chang Haonan himself.

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

So I immediately asked.

And this anti-guest question directly stunned Zhu Lan.

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

"As for the treatment, you can rest assured that we will take care of all your expenses in the capital, as well as the round-trip air ticket from Jincheng to the capital, and we can also give you an additional subsidy according to the basic salary standard of our group's senior researchers."

The Torch Group is a state-owned enterprise, and the company's money is not Chang Haonan's own money anyway, and the number of people in the company is small, so he basically does not hesitate to start treatment.

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

This is especially true for research institutions as remote as Jincheng University.

Even if Lin Guofan and Zhu Lan are both senior professors, their lives can only be said to be average.

It turns out that adding money really works.

"I have to discuss this matter with our family Lao Lin, but ...... It shouldn't be a big problem. ”

Zhu Lan thought about it for a while, although she didn't give a direct answer, but in terms of tone and expression, it was basically stable.

"That's good, our group is now in urgent need of reliable fresh blood, and we are in great need of talents like Professor Zhu to join."

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

However, colleges and universities do not restrict faculty members from working part-time outside of the school, so there is nothing wrong with it.

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

"By the way, the infinite element method I just talked about ......"

Zhu Lan picked up the pen again, ready to record what Chang Haonan said later.

But the latter waved his hand directly:

"Since you know the idea of the infinite element method, there is nothing to say, we can't immediately upgrade 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."

"It's just a part of the collaboration that Zhu Professor joins our research project."

Chang Haonan said this, obviously continuing to increase the requirements just now-

Ms. Zhu, you don't want your husband's research project to run out of tools, do you?

Ahem......

Zhu Lan on the other side has no objection to this, after all, in addition to the need for a long business trip, no matter how she looks at it, at least she will not lose.

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

Zhu Lan said and put the pen and notebook in her pocket.

The dinner party was almost beginning, and 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 still needs to be reported to our school."

"Study of the microscopic mechanism of the surface of the material removed during the grinding process of the abrasive belt."

(End of chapter)