Chapter 533 Madam, you don’t want to...
“Geological issues?”
This is completely a blind spot in Chang Haonan’s knowledge.
Although 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 is it?"
"At least I have to know the research object. That’s it.”
"Wait a minute..."
Zhu Lan fumbled around 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 the load of heavy-duty trains'. The research objects include instability of the water and heat balance conditions of permafrost and changes in the upper limit of frozen soil High-temperature and extremely unstable frozen soil areas including various unfavorable frozen soil 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.
Permafrost, train.
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.
Of course, having said that, you still have to be sure, otherwise it will be like being a fool.
"Are you planning to build a railway in XZ?"
Zhu Lan shook his head:
"This is what my old Lin told me last night when he called me. Because it was an outside call, there was no call. "It's too detailed."
"Let's take it as a yes for now."
Chang Haonan already had an estimate in his mind and just asked casually. No matter how Zhu Lan answered, he It will definitely continue with the trend:
"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 The fields are basically completely independent, so the numerical solution of the strongly nonlinear partial differential equations will eventually be implemented, which is exactly what the TORCMultiphysics software is good at, although the calculation process will be more troublesome.”
Hear. Zhu Lan's eyes lit up at Chang Haonan's judgment:
"In other words... it should be feasible?"
"It cannot be said that it is directly feasible."
Chang Haonan lowered his head and organized his words:
"There are no obstacles at the solution level of the core partial differential equations, but at the operational level, if it is really a railway thousands of kilometers long, even if only part of it is studied The frozen soil layer has a research range of at least hundreds of kilometers, so it is impossible to solve it as a closed-domain problem like the general problem. "
"The currently commonly used finite element method and finite volume method are all used. Well, if you must impose truncated boundary conditions when calculating open domain problems, you can consider constructing interpolation shape functions in the local coordinate system, such as Bettess elements and Astley elements, or directly constructing interpolation shape functions in the global coordinate system, such as Burnett elements... ..."
Speaking of this, Chang Haonan felt that these proper nouns might be a bit unfamiliar, so he changed the subject 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 dynamics of microscopic particles on the surface of metal materials during the grinding process. Model, are you 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 hopes to advance the engine to a state of sufficiently high stability before October 1999.
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.
And this question that turned against the guest directly stunned Zhu Lan.
Chang Haonan saw that the other party was worried about the distance between Jincheng and Beijing, and continued:
"As for the treatment issue, you can rest assured that all your expenses in Beijing will be covered by the distance between Jincheng and Beijing." We are responsible for all the round-trip air tickets, and we can also give you an additional subsidy based on the basic salary standard for senior researchers in our group.”
The Torch Group is a state-owned enterprise, and the company’s money is not Chang Haonan’s own. Money, plus the small number of people in the company, so he didn't hesitate at all in offering 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 proved that adding money is indeed effective.
"I have to discuss this matter with our old Lin, but... the problem shouldn't be big."
Zhu Lan thought for a while, although he did not give a direct answer, but from the tone In terms of facial expression, it is 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, colleges and universities do not restrict faculty members from working part-time outside the school, so speaking of it, there is 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. It is impossible for us to immediately upgrade a new version for this less commonly used method, but we can Develop an external toolkit for the infinite element method through reserved interfaces. "
"Just think of it as part of the cooperation with Professor Zhu,"
Chang Haonan said. , obviously continuing to increase the request just now——
Ms. Zhu, you don’t want your husband’s research project to be without useful tools, right?
Ahem...
Zhu Lan, who was opposite me, had no objection to this. After all, apart from the need for a long business trip, she would at least not lose money no matter how she looked at it.
"Then on behalf of my husband, I would like to thank Mr. Chang in advance for his help."
Zhu Lan said, putting the pen and notebook into his pocket.
The dinner was almost about to begin. She wanted to say goodbye and leave, but then she suddenly thought of something:
"By the way, Mr. Chang, what is the name of your project? This needs to be reported to our school."
"Study on the microscopic mechanism of the surface of the material removed during the abrasive belt grinding process."
(End of this chapter)