Chapter 217 External Load Calculation

The "Sea Diamond No. 6" maintenance project did not start smoothly.

Research is one thing, and really getting started is another. The semi-submersible offshore drilling platform is the most difficult and widely used among several offshore drilling platforms. 70% of the deep-water drilling platforms in later generations will use this method.

Even in the 1980s, there was a lot of research on it in academic circles in various countries, and the theories involved in the third generation of drilling platforms are becoming more and more complex. Sun Lixian and others soon encountered a bottleneck - the external load calculation of offshore drilling platforms.

Due to the operating environment, the offshore drilling platform is inevitably attacked by various forces. Including gravity, buoyancy, wind, waves, tides, ice and earthquakes, etc., all need to be taken into account. If there is no tsunami 1,000 kilometers away, the drilling platform here will collapse, or there will be a small magnitude 4 earthquake in the local area, and the drilling platform will be on fire...

The external load calculation of the offshore drilling platform is that the platform structure of "Sea Drilling No. 6" is damaged according to the platform structure design and strength verification. It needs to be repaired again. What materials are used just now, how much is used, and how to strengthen it. The load needs to be calculated before proceeding.

However, since Dahua Industry is not a manufacturer of "Sea Diamond No. 6", this degree of overhaul needs to be calculated by itself.

Of course, this kind of calculation is far less rigorous than the calculation at the time of production. Theoretically, you only need to calculate the limit value. But it's not easy to talk about that, especially in 1989, when various theories were still imperfect, this kind of cutting-edge technology was not well understood by the Chinese academic community. Not to mention the manufacturer.

That is to say, some of the information obtained by Dahua Industry through acquisitions and mergers can also be used.

However, the Tchengdao oilfield of Shengli Oilfield uses a bottom-type drilling platform. The Hua 105 used in the Sultan oil field in Abu Dhabi is also an improved version of the seat bottom type, which has not yet been delivered to the Hua 106. It is a second-generation semi-self-lift drilling platform produced by a joint venture company... The external load of each drilling platform is different and needs to be recalculated. Semi-submarine is the most troublesome of them.

Because the semi-submersible structure is complex, especially its cushion and the interior of the column. Vertical and horizontal components need to be strengthened and separated, and must be reprocessed.

is reflected in the external load, which is a variety of complications.

Even Sun Lixian is a great in materials and structural science in the future. Lying there, it is also dark, and the six souls are out of the body.

If the external load is not calculated, it is impossible to replace the structure. The engineers from Dahua have to carry out the repair and maintenance of well control, electrical, pipeline and other aspects first...

The Saudis are very anxious... If they really just change these devices, they will do it themselves!

As long as you buy it, the installation will be done.

It took Su Cheng two days to notice Sun Lixian's painful look. He lay down and couldn't laugh or cry: "Good guy, why are you going to write a paper? Start with the basic principles? Is half a year enough for you to study?

Sun Lixian's eyes turned red. Shining with Xiao Doudou on his face, he said in a hoarse voice, "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. There is no ready-made thing in foreign journals. You can only do it yourself first."

No matter how big the future is, he is now a young man who has just graduated. As he spoke, he said with embarrassment, "I didn't expect that the maintenance work was delayed here. I didn't think enough on that day, so I should be punished by myself."

"It's not an army. What kind of punishment?" Su Cheng waved his hand, thought for a moment, and said, "This actually belongs to the software part of software and hardware. Our country's software work has not been doing well. If there is no accumulation, it is not your fault. Well, I'll get the external load with you."

"Factory Director Su also knows the external load?" Sun Lixian's face was full of distrust. Since they joined Dahua Laboratory, Su Cheng has rarely done a single job. When these big cows gradually show their talents, Su Cheng is not as ugly as hiding his clumsiness, and focuses on institutions such as the Sertan Oilfield and the Offshore Oil Institute.

At this time, Su Cheng also drove the ducks on the shelves and said bravely, "When I was in school, I also studied the external load for a period of time. There was a laboratory teacher, who was an authority in this field, and gave him a lot of information."

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

Su Cheng coughed and thought to himself: He spilled the beans again. He smiled and said, "Let's transfer later, or it's not our school, it's another school, or a foreign scholar's visit to Peking University. At that time, I worked and studied hard and helped many teachers, but I couldn't remember too much.

Sun Lixian said "Oh", sorting out his achievements in recent days for Su Cheng to see, and chatted and said, "Su Dong, you are busy with work and study every day, and you still need to help visiting scholars. Do you have time to do the homework of the Chinese Department?"

Su Cheng was stunned and said, "What homework does the Chinese Department have? It is to read books, write articles and so on..."

"Really..." Sun Lixian pulled out a long tone. However, it's not because of suspicion, it's just a pure joke.

Compared with old men like Huo Chang, Su Cheng is about the same age as that of a researcher in the laboratory, and it is much more convenient to speak. On the contrary, the workers in the factory are much younger than those in Sioux City. In the 1980s, the children of many workers' families entered the factory after finishing junior high school. If it was a dual-career family, a better factory would be a regular worker. At the beginning, the length of service was calculated, which was more money than the students in high school. College students study for 6 or 7 years more than junior high school students, and they have to study again. Therefore, twenty-four or five-year-old workers have a long service of 10 years and a short of four or five years, which is not a newcomer.

Su Cheng and Sun Lixian soon got busy.

The two of them need to take the shortest time to figure out the formula for calculating the external load, verify it clearly, and then make a computer program, and then conclude that if it conforms to the specification, the actual platform can be modified. The order that Halliburton dared not accept for 3 million dollars is really not so easy to make.

However, it is necessary to come up with a practical formula in a limited time. After 20 years, it is no less than a fantasy.

Fortunately, this was 1989, and the complexity of the formula was not so high. Therefore, the Chinese people still have the foundation and level of creating miracles and manpower. With the passage of time, the content of science and technology is getting higher and higher, and the accumulation of technology is more and more, so it is difficult to have such things.

Su Cheng first wrote down all the external load formulas in his memory. Some of this is beyond the scope of undergraduate study, but it does not exceed its theoretical scope.

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

Every time you check the table, that is, a process of memory strengthening.

Su Cheng wrote for a day before filling in the frame. Among them, gravity, water purification buoyancy and wind are all ready-made. Relevant research was completed in the 1970s, but the flow force, seismic force and wave force are different. The first two are the current research hotspots. Wave force has not been studied clearly until 30 years later. There are many theories proposed by researchers from various countries. , but there is no theory that applies to all sea conditions...

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

Look at the watch, it's 8 p.m.

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

Before he could ask, others asked first, "What's wrong with the question mark behind the Stox fifth-order wave?"

"Oh, I don't remember this formula very well." Not only can't he remember the formula clearly, but he also remembers the time when the Stox fifth-order wave appeared.

Fortunately, Sun Lixian, who was on the side, chewed it and said, "It's the fifth-order Stokes wave. I saw it a few days ago. Wait a minute, I'll look for it..."

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

Hearing that Stox already has it, Su Cheng was relieved and said, "Don't worry, eat first, and finish it later."

Tao Jianhua, who is engaged in structural engineering, rubbed his hands and said, "Sousandong, what else is this? Let's finish it one day earlier, and the project will be completed one day earlier. Make the programming while the iron is hot.

The programming mentioned here is not real programming, but a block diagram, as the basis of programming. As for the real program, it is outsourced. Babale's fastest update www.26953.com - Babale updated this as soon as possible. Su City has used countless programs, and he is very familiar with it. He pulled the load chart calculated by the wind, wrote while drawing from top to bottom, and said, "After this is done, I must go to dinner..."

Tao Jianhua just nodded and looked at it and said, "Start, judge whether the member is on the surface of the water, then enter the next step, judge whether the member is shielded, and return, otherwise judge whether the member intersects the surface of the water'..."

Sun Lixian was stunned and asked, "Song, have you really studied external loads before?"

"Tay to you, when I was reading, I was teaching others. At that time, I was not serious. I just wanted to complete the teacher's task, so I remembered so much. All the formulas I know have been written down, and the rest will be pushed. I guess it can be done in a week..."

"A week is no problem, but..." Sun Lixian's face was shining with red beans and asked, "You remember these when you didn't take it seriously... Alas, it's a pity. If you were more serious, it would be great..." (To be continued