"This is the sun wheel, this is the big planetary wheel. www.biquge.info The number of teeth of the sun wheel is 17, the number of teeth of the planetary wheel is 80, the normal modulus is assumed to be 8, and the center distance is 388...... The non-meshing area is coarser and the meshing area is refined, and the node displacement matrix is U, and the finite element strain and stress matrix is as follows......"

Feng Xiaochen took a stack of blank maintenance registration forms, squatted on the ground like this, skillfully wrote the equations of finite element analysis in the blank space on the back of the form, and explained to Chen Bangpeng while writing.

If you can't write a model of finite element analysis in front of a machine, you should really wonder if his graduation certificate is sent with phone bills. Considering that there is no professional finite element analysis software in China, and all the calculation processes need to be programmed by the analysts themselves, Feng Xiaochen has simplified the analysis model to a high degree, simplified the three-dimensional to two-dimensional, and added some constraints.

Rao's equations are much more accurate than the calculation models used by Chen Bangpeng in the past, and according to such a set of equations, he will be able to effectively solve the problem of gear load mismatch.

When Feng Xiaochen was writing these equations, Wang Weilong, Chen Bangpeng, and several other technicians all gathered around, squatting or standing, all looking intently at Feng Xiaochen's formulas and symbols. Among these people, except for Chen Bangpeng, they are not studying gears, but when it comes to problems such as frame structure and trunk structure, they also need to use this set of stress analysis methods, so everyone held their breath, for fear of disturbing Feng Xiaochen, and at the same time desperately digested the deep meaning contained in these equations written by Feng Xiaochen.

"The general analysis framework is like this, and when it comes to the division of the grid, Chen Gong can think about it again. The more detailed you are, of course, the better the analysis, but the amount of computation will also increase exponentially, and I'm worried that the computers in your factory can't afford it. There is also this contact stress equation, Chen Gong can adjust it again, I am a layman, and the setting of the equation may not be very exact. ”

Feng Xiaochen finished writing all the equations, stood up, handed a stack of tables to Chen Bangpeng, and said with a slight smile.

"I see...... Oh, that's amazing!"

Chen Bangpeng took the stack of papers, looked back and forth, and the more he looked at it, the more excited he became, and there was still an unconvinced look on his face. In exchange for the ancient customs, he would have planned to bow to Feng Xiaochen.

Some of the equations written by Feng Xiaochen are not accurate, such as the concentric conditions and coincidence conditions of gears, which are very unprofessional in the eyes of Chen Bangpeng, a gear expert. But Chen Bangpeng didn't see these things, he focused on the set of analysis methods introduced by Feng Xiaochen, including how to divide finite elements, how to set up strain matrices, stiffness matrices, etc., which he had never figured out before.

Listening to Feng Xiaochen's introduction from beginning to end, Chen Bangpeng had a sudden realization that finite elements were like this, and with his wisdom, he was able to construct a set of equations that conformed to the actual situation according to the gourd, which was used to solve those problems in gear design.

As for the specific algorithm, it is even more difficult for Chen Bangpeng. Luo Ye is a large factory, and several computers have been added in the past two years, Chen Bangpeng and many people in the technical department have taught themselves ALGOL60 such algorithm grammar, and can skillfully program and transform the algorithm on paper into computer algorithms.

"Great, really good!" Chen Bangpeng said repeatedly, he turned his head to look at Feng Xiaochen, his face was embarrassed, and said sneeringly: "Director Feng, just now...... Alas, I won't say anything, and when I eat for a while, I will punish three cups and make amends to Director Feng. ”

Feng Xiaochen said with a smile: "Chen Gongyan is serious, what is not guilty, you are all heroes of the development of 120-ton dump trucks, I can't worship you yet." Also, don't call me Director Feng, if you really regard me as a friend, then just like Brother Wang, just call me Xiao Feng. ”

"This ......" Chen Bangpeng looked at Wang Weilong, not knowing whether to listen to Feng Xiaochen or not.

Wang Weilong said with a smile: "You don't have to be polite, Xiao Feng is well-known for his warm-heartedness in our Metallurgical Bureau. Everyone still remembers that Xue Li took her children to the capital to see a doctor, Xiao Feng saw that the two of them were squeezing the bus too hard every day, so they sold their face to help us borrow a house at the front door to live. Since that incident, I have recognized Xiao Feng as my best little brother. Everyone is like me, they regard Xiao Feng as their friend, and it is good to call him Xiao Feng. ”

As soon as he said this, everyone laughed, and stepped forward to greet Feng Xiaochen affectionately:

"Xiao Feng, it's amazing!"

"Xiao Feng, are you in your 20s this year? Where did you learn all your skills, and you gave us all the town!"

"Haha, what is it to suppress us, even Chen Gong has been suppressed, right? Chen Gong, are you convinced!"

"I don't know if Chen Gongfu is convinced, anyway, I am convinced. Oh, you said that Xiao Feng is only in his early 20s, not a few years older than the boss of my family, and he may be so old. ”

"Capability is one thing, but the most rare thing is humility, which is too rare......"

Feng Xiaochen nodded at everyone and smiled to express his humility. At this time, Xiao Xu and Xiao Guo, who had gone to cook before, came over and informed everyone that the meal was ready and they could be seated. Everyone gathered around Feng Xiaochen and came to the temporary dining table, insisting that he sit down in the main seat.

It is said that it is a dining table, but in fact, it is just a piece of plywood used when transporting dump trucks, and there is ore underneath, which has become the table where the Luo Ye team usually eats. The chairs are genuine, all of which are canvas folding chairs brought by Luo Ye's team, according to Wang Weilong, which are all made by Luo Ye himself, just for use in field operations.

There is a large temperature difference between day and night in the stope, and in order to resist the cold at night, the miners of the cold-water mine are accustomed to storing some liquor in the shed. Luo Ye's team followed the local customs and also prepared a lot of liquor, which was just right to welcome Feng Xiaochen at this time.

Wang Weilong was the leader of this cadre, he took the lead in standing up, raised his wine glass to Feng Xiaochen, and said to everyone: "Don't you know? The reason why Lengshui Mine can accept our industrial test is all because of Xiao Feng's golden idea. Have you noticed the stone factory over there? That was what Xiao Feng helped build the coldwater mine. Without this stone factory, the cold water mine is estimated to not accept us by now. I propose that everyone raise their glasses together and express their heartfelt thanks to Xiao Feng!"

"Thank you, Xiao Feng!"

Everyone picked up their wine glasses together and raised them to Feng Xiaochen. Feng Xiaochen hurriedly got up, raised his wine glass high, said a few polite words, and then drank the first cup with everyone.

Then, Wang Weilong introduced Feng Xiaochen's negotiation at the Pinghe Power Plant, the matter of buying meat and eggs for everyone, and the matter of finite element analysis that he had just taught everyone. When he finally finished his introduction, Feng Xiaochen felt that he was about to be put down.

After Wang Weilong sat down, Chen Bangpeng stood up, he also held a wine glass, and said to Feng Xiaochen: "Teacher Xiao Feng, I don't call you Director Xiao Feng, but I want to call you Teacher Xiao Feng." You've just given us a great introduction to finite element analysis. I have read things in the book many times that I didn't understand, and as soon as I heard you say, I will understand, you are my Chen Bangpeng's mentor. To be honest, I saw that you were young just now, and I still looked down on you, and now it turns out that I am completely wrong, you don't have to drink this glass of wine, count me as a punishment and make amends, okay?"

"Chen Gong, don't say that, you make me embarrassed. Feng Xiaochen got up and said, "What kind of teacher is not a teacher, I just learned a little bit by accident, and I was ugly in front of everyone just now." The 120-ton dump truck is a large-scale equipment made by our country's self-reliance, and the masters of Luo Ye have made great contributions. In this way, this glass of wine is my respect for everyone, and everyone did it together, how about it?"

Chen Bangpeng patted Feng Xiaochen's shoulder and smiled: "Haha, Xiao Feng is really too modest, your little fur is more than so many of us." Well, since Xiao Feng is so polite, let's do it together!"

Chen Bangpeng toasted, and others also began to toast one after another, saying nothing more than worship or thanks. Feng Xiaochen didn't dare to see the bottom of the cup, and found some reason to only take a small sip each time, so he was not put to the ground.

After the toasting ceremony, everyone began to eat. Half of the meat and eggs that Feng Xiaochen bought were used, plus a big hen weighing four catties, and the dishes on this table were very rich. Everyone has been vegetarian for several weeks, and finally seized a chance to open meat, all of them gobbled up, and the food looked extremely ugly. Feng Xiaochen had the intention not to grab food from everyone, but Wang Weilong directly coerced him with a chicken leg, and Chen Bangpeng gave him a big spoonful of braised pork, and piled the sea bowl in front of him sharply, and he could only eat it with him.

After sweeping the dishes on the table, everyone picked up the wine glasses again, and began to chat while drinking in twos and threes, Wang Weilong and Chen Bangpeng sat on both sides of Feng Xiaochen, and the object of conversation naturally chose Feng Xiaochen.

Chen Bangpeng asked: "Xiao Feng, you have just seen our dump truck, tell me, how is this car?"

"It's remarkable. Feng Xiaochen responded.

"Really, what do you think is remarkable?" asked Chen Bangpeng.

Feng Xiaochen said: "Under very simple technical conditions, mainly relying on our own strength, we have completed the development of such a leading major equipment, breaking the situation of long-term dependence on imports of such equipment, whether considering economic benefits or from the perspective of revitalizing the national spirit, it is a great achievement." ”

Chen Bangpeng laughed when he heard this: "Hahahaha, it was really from the Economic Commission, and it was summed up very highly, so that we people are embarrassed." ”

Feng Xiaochen smiled and looked at Chen Bangpeng, until Chen Bangpeng stopped laughing, and then he said slowly:

"But ......" (To be continued.) )