The Rise of Heavy Industry 1980

On the way back, Wang Chaoyang held back his strength, and the first thing he did when he returned to the Red Star Factory was to find Zhang Miaomiao.

Others can hide the fact that the raw materials are out of stock, but they can't hide it from Zhang Miaomiao, because Wang Chaoyang's next plan needs the support of this technician.

Wang Chaoyang intends to further optimize the design of the shaft, with the goal of reducing the diameter of the shaft from 15 mm to 12 mm. Didn't Pan Daqing's bastard want to stop supplying Red Star's bar material, then I will reduce the shaft diameter and not use your raw materials

! The 15 mm bar compressor is controlled by Pan Daqing, but the 12 mm bar is all over the street, and there are at least four sources in Nanyang City!

But the shaft diameter is from 15 mm to 12 mm, which is by no means so simple.

First of all, we must ensure that there is no problem with the strength, and then we must persuade Changhai Machinery to agree. And the basis of both points is to design the new diagram first.

After listening to Wang Chaoyang's plan, Zhang Miaomiao was so shocked that she couldn't close her mouth and reduced the shaft diameter by 3 mm, which was a huge challenge for the designer, which meant that all previous calculations were invalid and everything started from scratch. As the designer of the shaft, Zhang Miaomiao knows better than anyone what it means to start from scratch.

"This is the only way!" Wang Chaoyang's attitude was very firm.

"So, how much time do we have?" Zhang Miaomiao asked again.

"One day!" Wang Chaoyang said.

"One day?!You must be crazy! No way, one day is definitely not enough, the calculation is at least three days, and there is still time for checking and drawing!" Zhang Miaomiao couldn't help but raise her voice.

Wang Chaoyang was silent for a moment, and said with a slight smile: "I'm crazy, do you want to go crazy with me?"

Zhang Miaomiao stared at Wang Chaoyang with a pair of bright eyes, and saw something in this man that could not be described in words.

After a while, the female technician said, "Since you want to go crazy, why don't you start quickly!"

The design of the new shaft, completely abandon the original scheme, need to start from the customer input information and raw materials, these information Wang Chaoyang is not mastered, need to rely on Zhang Miaomiao, especially raw materials, Wang Chaoyang to the future generations of steel grades such as a number of treasures, but the era of optional materials do not know.

After the raw materials are selected, the preliminary design begins, and the dimensions of the mating end cannot be changed, but the other dimensions are completely determined by the designer.

In the strength calculation stage, Wang Chaoyang took out a piece of straw paper and wrote a full page of calculation formulas on it, Zhang Miaomiao was directly stunned, she had never seen this kind of calculation formula at all!"

"The traditional axis calculation will use the second strength theory and the third strength theory, and assume the failure mode in advance, and this assumption tends to be conservative, that is, the value you calculate is larger than the actual value. Wang Chaoyang explained.

"Well, I know that. Zhang Miaomiao nodded, she still knew this kind of basic knowledge.

"Do you know the Fourth Strength Theory?" Wang Chaoyang asked.

“...... Heard it, but never used it. Zhang Miaomiao said.

The fourth strength theory, also known as the Mohr strength theory, is a mathematical model derived from the maximum deformation energy, which appeared later than the previous three intensity theories, but countless facts have proved that the fourth strength theory is closer to reality.

It's just that the calculation of deformation energy is too complicated for most engineers to use, so Zhang Miaomiao has only heard of it.

"On the papyrus paper, it is the fourth strength theory, and the next thing we have to do is to solve it!" Wang Chaoyang said.

Zhang Miaomiao stared at the formula on the straw paper, and her breathing gradually became shorter.

If mechanical design is compared to building a building, then the strength theory is a reinforced frame, and the number of floors that can be built in a building depends entirely on the supporting capacity of the reinforced frame.

"Okay, I'll do this!" Zhang Miaomiao took another piece of straw paper and began to calculate.

In fact, even if she didn't volunteer, Wang Chaoyang had to ask her to help. is still the same sentence, Wang Chaoyang is a handicapped party, don't look at him can write formulas freely, but if you really calculate the square and open root number, it is more difficult than killing him.

Zhang Miaomiao immersed herself in writing and writing, and in an hour, used up more than 20 pieces of straw paper, and finally came to the result, the minimum calculated diameter was 11.36 mm.

Seeing this value, Zhang Miaomiao was both excited and surprised, which shows that the use of a 12 mm shaft is promising! At the same time, she also felt the complexity of the academics, she used the second and third strength theories to calculate the result is 14.25 mm, the difference in strength theory, the result is so much different!

Wang Chaoyang fully understood Zhang Miaomiao's expression, just as when he was lecturing to students as a visiting professor before, he demonstrated the differences between the four strength theories on the blackboard, and the students in the audience also had this expression.

And it turns out that even the theory of the fourth intensity, which is closest to reality, is biased, because it assumes a uniform conductivity of energy, and any theory with hypothetical conditions has limitations, which is an iron law.

In order to compensate for this limitation, the theory of finite element analysis was later developed, and the calculation results are closer to reality, but the finite element has no limitations? The answer is no, because the finite element often needs to assume the isotropy of the material.

Of course, although Wang Chaoyang is also very proficient in finite element theory, Wang Chaoyang did not use the massive amount of calculations, and he had to race against time.

Based on the minimum value of the shaft of 11.36 mm, Wang Chaoyang and Zhang Miaomiao began to design the structure of the new shaft, after which it will be a local check and optimization design ......

Time passed imperceptibly, the sun began to set, and Zhang Miaomiao's office lit a kerosene lamp. In this era, electricity is scarce, and non-industrial electricity is saved.

The kerosene burned out twice, and the eastern land appeared white.

At this time, the grass design of the new shaft had appeared on the straw paper in Zhang Miaomiao's hand.

"Let's rest for a while, I'll do the rest!" Wang Chaoyang said.

"I'm not sleepy!" Zhang Miao didn't raise his head.

"If you're not sleepy, you're always hungry, right? No matter how tight time is, you can't starve people!" Wang Chaoyang finished speaking, Zhang Miaomiao still had no intention of moving.

In desperation, Wang Chaoyang had no choice but to get food in person. Zhang Miaomiao's office and residence are connected, with a simple kitchen in the middle, which is very clean, with leeks and eggs in the cupboards, as well as leftover millet and dried rice.

Wang Chaoyang used to be a foodie, and he didn't cook much, so he was no stranger to the kitchen, so he immediately fried a leek egg, thinned the rice into rice, and finally brought a bowl of porridge and leek scrambled eggs into Zhang Miaomiao's office.

Zhang Miaomiao smelled the unique fragrance of scrambled eggs with leeks, her stomach couldn't help but gurgle, and she raised her head to reveal a strange look: "You can still stir-fry?"

Wang Chaoyang said: "It's okay to make do with it."

Zhang Miaomiao took the first bite and found that the taste of this leek scrambled egg is by no means "improvised" can be described, it is tender and glutinous, and the fragrance of leeks is better than that of her mother's fried eggs.

Wang Chaoyang didn't think anything, when he fried this dish, the leeks were washed first and then cut, so as to retain the fragrance of the leeks, and before the eggs were fried, put in an appropriate amount of water and salt, so that there would be a tender and glutinous taste.

The economic foundation determines the superstructure, which leads to the fact that even Zhang Miaomiao, whose family conditions are not bad, has never eaten such delicious scrambled eggs with leeks.

Although Zhang Miaomiao wanted to maintain the image of a lady, she was really hungry and tasted really good, so she became a gobbling up while eating, and a plate of scrambled eggs with leeks was almost wiped out by her alone, and finally the girl wiped the corners of her mouth and said embarrassedly: "Or, you can scramble again, there are still a lot of eggs, you sent them last time." Of

course, "......" Wang Chaoyang wants to fry again, the revolution has not yet succeeded, and he can't work hungry!