The "Haizhuan No. 6" maintenance project did not start smoothly.

It's one thing to research, it's another to actually get started. The semi-submersible offshore drilling platform is the most difficult and widely used among several offshore drilling platforms. Seventy percent of the deepwater drilling platforms of later generations will use this method.

Even in the 80s, there was a lot of research on it in the academic circles of various countries, and the theories involved in the third generation of drilling platforms became increasingly complex. Sun Lixian and others soon encountered a bottleneck - the calculation of the external load of the offshore drilling platform.

Offshore drilling platforms are inevitably attacked by various forces due to the operating environment. Including gravity, buoyancy, wind, waves, tidal currents, ice and earthquakes, etc., all need to be taken into account, not 1,000 kilometers away there is a tsunami, here the drilling platform collapses, or a small earthquake of magnitude 4 locally, the drilling platform is raging......

The calculation of the external load of the offshore drilling platform is based on the structural design and strength check of the platform, and the platform structure of the "Haizhuan No. 6" is damaged and needs to be repaired again.

However, since Dahua Industry is not the manufacturer of "Haizhuan No. 6", this level of overhaul needs to be calculated by itself.

Of course, this calculation is far less rigorous than the calculation in production, and in theory, it is only necessary to calculate the limit value. But that's not easy to say, especially in 1989, when various theories were still in an imperfect state, and this kind of cutting-edge technology was not well understood by Chinese academic circles. Not to mention the manufacturer.

That is, some of the information obtained by Dahua Industrial through mergers and acquisitions can also come in handy.

However, the Chengdao Oilfield of Shengli Oilfield uses a bottom-type drilling platform. The Setan oil field in Abu Dhabi uses the Hua 105 which is also an improved version of the bottom type, and the Hua 106 has not yet been delivered. It is the second-generation semi-jack-up drilling platform produced by the joint venture...... The external load is different for each rig and needs to be recalculated. The semi-submersible is the most troublesome of them all.

Because of the complexity of the semi-submersible structure, especially its sinking pads and the inside of the columns. Longitudinal and transverse elements need to be reinforced and separated and must be reprocessed.

Reflected in the external load, it is a variety of complexities.

Even Sun Lixian, a future material science and structure expert. Lying there, it can be regarded as dark, and the six souls are out of the body.

If the external load is not calculated, the replacement of the structure is impossible. Dahualai's engineers had no choice but to carry out repair and maintenance in well control, electrical, and pipeline first......

This makes the Saudis look very anxious...... If it's really just a change of these devices, they themselves will too!

As long as the purchase comes, the installation is not done.

It took Su Cheng two days before he noticed Sun Lixian's painful appearance, and when he looked at it, he couldn't help but laugh: "Good guy, how are you going to write a thesis? Start with the basic principles? Is half a year enough time for you to study?"

Sun Lixian's eyes were red. and Xiaodoudou on his face lit up, and said in a hoarse voice: "Aren't our drilling platforms all built up like this?" The external load of Hua 105 is calculated by me, but this sea drill 106 is completely different, and there is no ready-made thing in foreign journals. I can only get it up myself. ”

No matter how big the future is, he is now a young man who has just graduated, and he said embarrassedly: "I didn't expect that the maintenance work was delayed here by me, and I didn't think about it enough that day, so I should ask for punishment." ”

"It's not the army. What kind of punishment. Su Cheng waved his hand, thought for a while, and said: "This, in fact, belongs to the software part of the software and hardware, our country's software work has not been done well, there is no accumulation, and I don't blame you." Well, I'll work with you to get the extra load. ”

"Director Su also understands external loads?" Sun Lixian's face was full of distrust. Since they joined Dahua Laboratory, Su Cheng has rarely done a single job, and when these big bulls gradually showed their talents, Su Cheng was even more ugly than clumsy, focusing on institutions such as the Setan Oil Field and the Offshore Petroleum Institute.

At this time, Su Cheng also rushed the ducks to the shelves, and said stubbornly: "When I was in school, I also studied the external load for a period of time, and there was a teacher in the laboratory, who was an authority in this area, and he sorted out the information a lot. ”

"I haven't heard of our country's authority on external loads? Sun Lixian's face was full of suspicion.

Su Cheng coughed and thought: I missed my mouth again. He smiled and said, "Later, I was transferred, or it wasn't from our school, it was another school, or foreign scholars visited Peking University." At that time, I was working and studying and helping a lot of teachers, but I can't remember too much. ”

Sun Lixian let out an "oh", and while sorting out his achievements in the last few days to show Su Cheng, he chatted and said: "Su Dong, you are busy with work-study every day, and you also have to help visiting scholars, do you have time to do homework in the Chinese department?"

Su Cheng was stunned by what he said, and said, "What homework does the Chinese department have, just read books, write articles, or something......

"Yes......" Sun Lixian pulled out a long tone. However, it is not because of suspicion, it is just pure ridicule.

Compared with old men like Huo Chang, Su Cheng is about the same age as a researcher in the laboratory, and it is much easier to speak. Rather, it was the factory workers, much younger than Sioux City. In the 80s, many children from working families entered the factory after finishing junior high school, and if it was a dual-income family, the better factory would be a regular worker, and the number of years of service would be counted as more than the high school students. College students have to study for 6 or 7 years longer than junior high school students, and they have to be in the situation of not repeating their studies. Therefore, a worker who is twenty-four or five years old has worked for 10 years and four or five years for the shortest, and is not considered a newcomer.

Su Cheng and Sun Lixian quickly got busy.

The two of them have to use the shortest time to figure out the formula for calculating the external load, and verify it clearly, and then make a computer program, and then come to the conclusion that if it is in line with the specification, the platform can be modified in substance. Haliburton's $3 million order is indeed not so easy to make.

However, it would be a fantasy to come up with a practical formula in a limited time and put it in 20 years.

Fortunately, this was 1989, and the complexity of the formula was not so high, so the Chinese still had the foundation and level to create miracles and human victory. As time goes by, the technology content is getting higher and higher, and the technology is accumulating more and more, and it is difficult to have such a thing again.

Sioux City first wrote down all the formulas of external load in his memory. This is somewhat beyond the scope of undergraduate study, but it is not beyond the theoretical scope.

When he was working as a teacher, he sorted out all kinds of data. What is the gravity distribution load of the member, the gravity correction factor, the material specific gravity of the member, the buoyancy correction factor, etc., are all empirical and need to be obtained by looking up the table.

Every time you look up the table, it is also a process of mnestic.

Sioux City wrote for a day before filling in the frame. Gravity, water purification buoyancy and wind force needless to say, all ready-made things are available, related research was done in the 70s, but the flow force, seismic force, wave force is different, the first two are now the research hotspot, wave force until 30 years later, there are many theories put forward by researchers from various countries, but none of them are applicable to all sea conditions......

Su Cheng himself only remembered two kinds of linear waves and isolated waves, checked the information, and recalled the elliptical cosine wave, and finally thought about it for a long time, and added a Stox fifth-order wave, but put a question mark on the back.

Looking at my watch, it was already 8 o'clock in the evening.

"Didn't anyone call for dinner...... Su Cheng rubbed his neck and raised his head, but was surprised to find that he and Sun Lixian were surrounded by nearly 10 people, almost all of whom were engineers from Dahua Laboratory.

Without waiting for him to ask, the others asked first: "What's the matter with the question mark behind the fifth-order wave of Stockx?"

"Oh, I don't remember the formula very well. Not only could he not remember the formula, but he could also remember the time when the fifth-order wave of Stox appeared.

Fortunately, Sun Lixian, who was on the side, chewed it and said, "It's a fifth-order stokes wave, I saw it a few days ago, wait for me to find ......."

At this time, the various translations were not standardized, and many people were used to using foreign languages, at least without making mistakes.

Hearing that Stokes already had it, Su Cheng was relieved and said, "Don't worry, let's eat first, and then get it after eating." ”

Tao Jianhua, who was engaged in structural engineering, rubbed his hands and said: "Su Dong, what kind of food are you eating, let's finish it one day earlier, and the project will be completed one day earlier." Strike while the iron is hot and program it. ”

The programming mentioned here is not real programming, but making a block diagram as the basis of programming, and as for the real program, it is to be outsourced.

In this regard, Su Cheng used countless programs, and he was very familiar with it, pulling the load map of the wind calculation, from top to bottom, drawing and writing, and said: "This is done, I must go to dinner......

Tao Jianhua just nodded, looked at it and said: "Start, judge whether the rod is on the water surface, if yes, then enter the next step, judge whether the rod is occluded, and if yes, return, otherwise judge whether the rod intersects with the water surface......"

Sun Lixian was stunned for a while when he heard this, and asked, "Su Dong, have you really studied external loads before?"

"To tell you, when I was studying, I gave a hand to the teacher, and I was not serious at that time, and I just thought about completing the teacher's task, so I remembered so much. I know that the formulas are all written, and I can make the rest in a week......"

"It's okay for a week, but it's ......" Sun Lixian's face was shining with red beans, and he asked, "You remember these when you weren't serious back then...... Alas, it's a pity, if I were more serious, it would be ......" (Your support is my biggest motivation.) )