The "Haidian No. 6" maintenance project did not start well.

Research is one thing, but it is another to really get started. Semi-submersible offshore drilling platforms are the most difficult and most widely used among several offshore drilling platforms. 70% of the deep-water drilling platforms in later generations need to be used in this way.

Even in the 1980s, academic circles in various countries had a lot of research on it, and the theories involved in the third-generation drilling platform became increasingly complex. Sun Lixian and others soon encountered a bottleneck - the calculation of external loads of offshore drilling platforms.

Due to the operating environment, offshore drilling platforms are inevitably attacked by various forces, including gravity, buoyancy, wind, waves, tides, ice and earthquakes, etc., all need to be considered. There cannot be a tsunami 1,000 kilometers away, and the drilling platform collapses, or a magnitude 4 earthquake occurs locally, and the drilling platform is in full swing...

The external load calculation of offshore drilling platforms is based on the platform structure design and strength verification. The platform structure of "Sea Drill No. 6" is damaged and needs to be repaired again. What materials are used, how much to use, and how to strengthen them, all the load needs to be calculated before proceeding.

However, since Dahua Industrial is not a manufacturer of "Haidiao No. 6", overhaul of this level requires calculations by itself.

Of course, this kind of calculation is far less stringent than the ones in production. In theory, it only takes the limit value to be calculated. But that's not easy, especially in 1989, when various theories were still incomplete, the Chinese academic community had little understanding of this cutting-edge technology, let alone manufacturers.

That is, some of the information obtained by Dahua Industrial through acquisition and merger can also be useful.

However, the Chengdao Oilfield of Shengli Oilfield uses a base-based drilling platform. The Sertan Oilfield of Abu Dhabi uses a Hua105 and an improved version of the base-based drilling platform. The Hua106, which has not been sent yet, is a second-generation semi-jellow drilling platform produced by a joint venture... The external load of each drilling platform is different. It needs to be recalculated. Semi-submersible is the most troublesome one.

Because the semi-submersible type has a complex structure, especially its cushion and column interior, the longitudinal and transverse directions require various components to be strengthened and separated, and must be reprocessed.

It is reflected in external loads, which are of various complexity.

Even Sun Lixian, a future material science and structure giant, lying there, would be considered as dark and dark, and his six souls left their bodies.

The external load has not been calculated. It is impossible to replace the structure. Engineers from Dahua have to do the maintenance of well control, electrical, pipelines, etc. first...

This is a very anxious look at the Saudis... If they really just change these devices, they will do it themselves!

As long as you buy it, you will install it.

It took two days before Su Cheng noticed Sun Lixian's painful appearance. He looked up at him and was amused and crying: "Good guy, what are you going to write a paper? Starting from the basic principles? Is half a year enough for you to study?"

Sun Lixian's eyes were red. He shone with the little doodle on his face, and said hoarsely: "Isn't our drilling platform all done like this? I calculated the external load of Hua 105, but this sea drill 106 is completely different. If you look up foreign journals, there is no ready-made stuff, so you can only do it yourself."

No matter how hard the future is, Daniu is still a young man who has just graduated. As he spoke, he said embarrassedly: "I didn't expect that the repair work was delayed by me. I didn't think enough that day, so I should ask for punishment."

"It's not the army, why are you doing it?" Su Cheng waved his hand, thought for a while, and said, "This is actually the software part of software and hardware. Our country's software work has been not done well. It's not your fault if there is no accumulation. Let's do this, I'll get the external load with you."

"Director Su also understands external loads?" Sun Lixian looked distrustful. Since they joined Dahua Laboratory, Sucheng has rarely done a single job. When these big guys gradually showed their talents, Sucheng is even more hiding his weakness than offering ugly things, and has devoted his main energy to institutions such as Setan Oilfield and Offshore Oil Institute.

At this time, Su Cheng also drove the ducks to the shelves and said with a tough bullet: "When I was in school, I also studied external loads for a period of time. There was a teacher in the laboratory who was the authority in this area and had sorted out a lot of information for him."

"Our country is the authority of external loads? I haven't heard of it at Peking University." Sun Lixian looked suspicious.

Su Cheng coughed and thought to himself: I missed it again. He smiled and said, "I was transferred later. Maybe it wasn't from our school, but another school, or a foreign scholar visited Peking University. I worked part-time and helped many teachers, but I couldn't remember too much."

Sun Lixian said "Oh" and sorted out his achievements in the past few days for Su Cheng to show them, while chatting: "Dr. Su, you are busy working and studying every day, and you also have to help visiting scholars. Do you have time to do your homework in the Chinese department?"

Su Cheng was stunned by the words and said, "What is the assignment of the Chinese Department? It's just reading books, writing articles, etc...."

"Is that true..." Sun Lixian pulled out a long tone. However, it was not because of suspicion, but just a pure joke.

Compared with old men like Huo Chang, Sucheng is about the same age as those of the laboratory researchers and is much more convenient to speak. However, the workers in factories are much younger than those in Sucheng. In the 1980s, many children from working families entered the factory after junior high school. If they were in a double-working family, a better factory would be a formal worker. They started to count their working years, which was more money than those in high school. College students had to study for 6 or 7 years more than junior high school students, and they still had to repeat the school. Therefore, workers of twenty-four or five years have a long working experience of 10 years and a shorter one, and are not considered newcomers.

Su Cheng and Sun Lixian quickly got busy.

The two of them had to use the shortest time to calculate the external load, verify it clearly, and then make it into a computer program, and then draw a conclusion that if it complies with the norms, they could make substantial platform modifications. The order that Halliburton dared not take on $3 million is indeed not so easy to make.

However, it is a fantasy to come up with practical formulas in a limited time and put them in 20 years.

Fortunately, this was 1989, and the complexity of the formula was not that high, so the Chinese still had the basis and level to create miracles and overcome nature by manpower. As time goes by, the technological content is getting higher and higher, and the technology accumulates more and more, so it is difficult to have such things again.

Su Cheng first wrote down all the external load formulas in his memory. This is somewhat beyond the scope of undergraduates' learning, but not beyond their theoretical scope.

When he was working for his teacher, he sorted out various data a lot. The gravity distribution load of the rod member, the gravity correction coefficient, the material specific gravity of the rod member, the buoyancy correction coefficient, etc. are all empirical and need to be found in the table.

Every time a table is checked, it is a process of memory strengthening.

Sucheng wrote it for a day before he filled the framework. There is no need to say that gravity, water purification buoyancy and wind power are all available. Related research was completed in the 1970s, but the flow, seismic force, and wave force are different. The first two are the hot topics of research today. Wave force has not been studied clearly until 30 years later. There are many theories proposed by researchers from various countries, but none of them are applicable to all sea conditions...

Su Cheng himself only remembers linear waves and isolated waves. After checking the information, he recalled the elliptical cosine waves. Finally, he thought about it for a long time and added a fifth-order Stokes wave, but asked a question mark behind it.

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

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

Before he could ask, someone else asked first: "What's wrong with the question mark behind the fifth-level wave of Stokes?"

"Oh, I don't remember this formula very clearly." Not only can't remember it clearly, but he also remembered the time when the fifth-order wave of Stokes appeared.

Fortunately, Sun Lixian next to him chewed for a while and said, "It's a fifth-level Stokes wave. I saw it a few days ago. Wait for me to look for it..."

At this time, all kinds of translations are not standardized, so many people are accustomed to using foreign languages, at least they will not make mistakes.

When he heard that Stokes had already existed, Su Cheng felt relieved and said, "Don't worry, eat first, and finish it."

Tao Jianhua, who was engaged in structural engineering, rubbed his hands and said, "Dr. Su, what else can you eat? Let's finish the project one day earlier and complete the project one day earlier. Strike while the iron is hot and make the program."

The program preparation mentioned here is not about real programming, but about making program block diagrams. As the basis of programming, the real program needs to be outsourced.

In this regard, Su Cheng used countless programs, and was very familiar with it. He touched the load diagram of wind power calculation, drew from top to bottom, and wrote while drawing, and said: "I have finished this, I must go to have a meal..."

Tao Jianhua just nodded and looked at the thought: "Start, determine whether the rod is on the water surface, then go to the next step, determine whether the rod is covered, and then return, otherwise determine whether the rod is intersected with the water surface. "

Sun Lixian was confused when he heard this and asked, "Dr. Su, have you really studied external loads before?"

"I told you that when I was studying, I was not serious at that time. I just remembered the teacher's tasks. I wrote all the formulas I knew. I pushed the others and I guess I could do it in a week..."
Chapter completed!