Chapter 434 New DLC: High-speed Rolling Dynamics of Bearings
Rolling bearings look ordinary, as if they are just beads or cylinders stuffed into a ring, but in fact, the number of balls, ball diameter, padding, etc. A series of indicators such as disc angle, inner and outer ring raceway groove curvature coefficient, radial clearance, etc. will have a significant impact on the performance and life of the bearing, and need to be set according to different specific conditions.
The problems faced by domestic aerospace bearings, or domestic bearings in general, 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.
More importantly, 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 these places...
< br>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, do you have any good news for me?"
"Director Ding, I would like to ask you to send a notice to several universities under the Science and Technology Commission to inquire. Research and talent pool on 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, even if the former creates some more miracles, He can be mentally prepared.
“We are busy enough now. There are definitely no new projects, and it is still a matter of our third-generation turbofan promotion... 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 the data is transformed into better-use equipment, the following People 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 still a gap between users and their upstream R&D personnel. It is relatively fragmented. Except for a very small number of special personnel who are responsible for test flights or tactical training tasks, few people actually care about what kind of process 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 responsible for 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, you have analyzed it all in more than half a month?"
Every time 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, drawing 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 failure factor of aviation engines 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, so there is really no way to explain it. was too detailed, so I had to quickly shift the topic to specific technical issues. "I see... But Xiao Chang, please wait a moment. You may not need to go to the trouble of sending an announcement..."
After Ding Gaoheng finished speaking, he put the phone receiver on the table and picked up another phone. He was able to get through the internal call, 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 a relevant material, which was an application for the establishment of a bearing industry association..."
In the late 1990s, with the various products of China, As China gradually becomes able to go abroad, the demand for standardization and organization in various manufacturing industries is also increasing. However, the scale of several ministries and commissions in charge of the development of China's industrial field has been shrinking, so many such spontaneously organized industry associations have been formed.
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.”
……
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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 over, 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?"
Chang Haonan, who heard TORC Multiphysics, also became interested:
"Then do they have any comments or suggestions about this software?"
He knew that if he directly asked for reviews, he would only get I can get some rainbow farts that don’t mean much, so why not be more direct.
"Well, in fact, everyone is still in the introductory stage, and we haven't even learned most of the functions yet. If I have to say..."
Wang Qinli lowered his head and thought. 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 are almost found in all walks of life (although they may not all be easy to use), but Torch Company is obviously Without such conditions, many tasks would still have to be done by oneself.
“This is indeed our main plan for the next stage, and this time I invited you here, 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. Released as DLC of the software"
(End of this chapter)