Chapter 434 New DLC: High-speed rolling dynamics of bearings

Rolling bearings look ordinary, as if they are just beads or cylinders stuffed in a ring, but in fact, the number of balls, ball diameter, gasket angle, curvature coefficient of the inner and outer ring raceway grooves, radial clearance, etc. A series of indicators will have a significant impact on the performance and life of the bearing and need to be set according to different specific situations.

The problems faced by domestic aerospace bearings, or domestic bearings as a whole, are very complex, ranging from manufacturing processes, material levels to design capabilities.

In many cases, it’s not just that the level is not enough, but that the degree of adaptation is not enough, or there is a problem with the key parameters selected.

Therefore, if you really want to improve a small bearing, it will involve mechanics, mathematics, materials science, mechanical design and many other disciplines. It is really not something that Chang Haonan can solve alone.

What's more important is that at this time, almost all domestic research groups specializing in bearings have a mechanical or vehicle subject background, but the bearings used by aerospace engines are actually quite different from those in these places...

Ding Gaoheng's call was quickly connected.

In fact, the normal process to find Ding Gaoheng should be through his secretary, but Chang Haonan happens to be one of the few people who can directly contact him personally.

"Xiao Chang, are you looking for any good news from me?"

"Director Ding, I would like to ask you to send a notice to several universities under the Science and Technology Commission to inquire about the research and talent reserves of high-speed rolling bearings."

As the contact between the two becomes more and more frequent, it is no longer necessary to spend a few minutes chatting first every time. If you have any questions, just get to the point.

"High-speed rolling bearing...what new project have you taken on?"

Obviously, for Ding Gaoheng, who has become accustomed to Chang Haonan's efficiency, he will be mentally prepared even if the former creates some miracles.

"We are busy enough now. There must be no new projects, or it is a matter of our third-generation turbofan promotion... Do you still remember the aero-engine usage and maintenance data I asked you for last month?"

Hearing this question, Ding Gaoheng suddenly became energetic:

"Of course you remember. During that time, in order to collect materials for you, the general office worked overtime for almost a week. The science and technology offices in various places and the equipment department of the People's Liberation Army were also troubled by your words. I guess Ah, there are many people who say bad things about me behind my back."

Having said that, when he first heard Chang Haonan's slightly unreasonable request, he actually agreed without even thinking about it.

Chang Haonan on the phone also responded half-jokingly:

"Don't worry, Director Ding, I have already analyzed it. When those data are transformed into better-use equipment, the people below should remember your kindness..."

Chang Haonan's name is basically quite loud in the military industry, especially in the aviation industry system. However, there is actually a separation between users and their upstream R&D personnel, except for a very small number of special personnel who are responsible for test flights or tactical research and training tasks. In addition, few people actually care about the process by which the equipment in their hands is designed.

Unless it is particularly easy to use like the Kalashnikov of the past, or it is particularly difficult to use like the Type 21 Combat Dad of the future.

In short, in most cases, no matter good or bad, those who directly bear this reputation must be the Commission of Science, Technology and Industry for National Defense, which is in charge of research and development, and the General Armament Department (or General Logistics Department) as Party A.

But Ding Gaoheng obviously has no time to pay attention to these now:

"Have you analyzed... so much data? It took you more than half a month to analyze it all?"

Whenever he thought he could face Chang Haonan with a normal heart, the latter would always come up with something new for him.

Although the use of statistical methods to rank the importance of research directions can be traced back to the Second World War, due to limitations in data volume and computing level, the development of this field has not been obvious in the following decades. It is not surprising that Ding Gaoheng Feel surprised.

"Well... of course it's not all up to me. There are other people who are responsible for inputting data, making charts and making tables... But the conclusion is indeed obvious. The two sets of bearings before and after the high-pressure compressor rotor are the main fault of the aviation engine. Factors can account for more than one-third of all failure causes. This is not only a problem faced by our country, but also a problem faced by developed countries, so I hope to solve it on the new generation of turbofan engines."

In fact, Chang Haonan's analysis of these data does have some meaning in artificial big data algorithms, and it also benefits greatly from his identity as a reborn person. Therefore, there is really no way to explain in too much detail, so he has to quickly discuss the topic. Move to specific technical issues.

"I see... But Xiao Chang, please wait a moment. You may not need to go to the trouble of making an announcement..."

After finishing speaking, Ding Gaoheng put the phone receiver on the table, picked up another phone that could only connect to the internal line, asked his secretary to send him a file, and then continued to say to Chang Haonan:

"I remember that at the beginning of this year, the Ordnance Industry Corporation reported relevant information, which was an application for the establishment of a bearing industry association..."

In the late 90s, as various products of Huaxia were gradually able to go abroad, the demand for standardization and organization in various manufacturing industries was also increasing. However, the scale of several ministries and commissions in charge of the development of Huaxia's industrial field was gradually shrinking, resulting in the formation of many This type of voluntary industry association.

A few minutes later, Chang Haonan heard a knock on the phone.

"Yes, there are several research groups at Bingcheng University of Technology and Northwestern Polytechnical University who are studying this direction. I will ask them to contact you as soon as possible."

……

The system of the Science, Technology and Industry Committee is indeed inefficient.

Just two days later, a professor named Wang Qinli flew directly to the capital with two graduate students from his research team to meet with Chang Haonan.

"Hello, Professor Wang."

The other party had already sent an email before coming here, so Chang Haonan knew that the other party was currently a professor at Bingcheng University of Technology and the department head of the School of Mechanical and Electrical Engineering.

Although it is necessary to address one's position at work, there is still a slight difference in status between him as director and director Ding Gaoheng.

Even the signature at the end of the email puts professor first, and it is obvious that he values ​​this title more.

"Mr. Chang, I am so happy to be able to personally participate in our project this time."

Wang Qinli stepped forward quickly and shook hands with Chang Haonan excitedly:

"You don't know that during this period, several professors from our college mentioned your name to me almost every day, as well as the multi-physics simulator."

"Oh?"

After hearing about TORCH Multiphysics, Chang Haonan also became interested:

"Then do they have any comments or suggestions about this software?"

He knew that if he asked directly for evaluation, he would only get some meaningless rainbow farts, so he might as well be more direct.

"Well, actually, everyone is still in the introductory stage. We haven't even learned most of the functions yet. If I have to say..."

Wang Qinli lowered his head and thought for a moment:

"I just hope that some toolkits like MATLAB can be launched, especially for the production side and some users who only need to deal with simple problems. It is really difficult for them to start learning from the most basic algorithms."

This really hits home the biggest shortcoming of Torch Company, which is that the software ecosystem has not yet been developed.

Many MATLAB toolkits are not officially produced by MathWorks at all, but are written and released by users or other companies, so they can be found in almost all walks of life (although they may not all be easy to use). However, Torch Company obviously does not have such conditions at the moment, and many Life can only be done by yourself.

"This is indeed our main plan for the next stage, and I invited you here this time, and I happened to have a similar idea to design a high-speed rolling bearing dynamics analysis module for TORCH Multiphysics specifically for the bearing industry, and release it as a DLC of the software .”