The expressions of Zheng Tao and others were suddenly stunned.
I saw several people looking at each other in surprise. After confirming that the speaker was not one of the standing people, they all turned their heads.
Locked eyes...
Xu Yun in a wheelchair.
"..."
Zheng Tao first looked up and down carefully at Xu Yun, who looked like the second-generation Tsuchikage in "Naruto", and then asked with some uncertainty:
"Comrade, was it you who was talking just now?"
Xu Yun nodded and admitted:
"Yes, it's me."
"...."
Zheng Tao was silent for a few seconds, the expression on his face was inexplicably subtle:
"Comrade, you just said..."
"Just placing a few rectangular boxes on the top of the tower can prevent the watchtower from shaking?"
Xu Yun took a moment to raise his neck this time, faced Zheng Tao face to face, and said:
"That's right, but these boxes need to be filled... No, I should say half full of water."
After confirming that he really had no auditory hallucinations, Zheng Tao's face clearly showed a hint of surprise.
His eyes subconsciously glanced at the toolbox next to him, and he tapped twice with his toes:
"A box like this?"
"Yes, but it's better to be a little higher. The height is about half a meter, and the base area is larger...about twice as much."
Zheng Tao stopped talking.
It's not that he understood Xu Yun's thoughts, but after hearing Xu Yun's words, he became more and more confused.
To know.
In order to solve the shaking of the watchtower, the construction side team has thought of many ways in the past two days, but none of them can solve the problem.
Then the mumaiyin said, oh, just putting a water tank on the top of the watchtower can prevent the tower from shaking?
What the hell is this?
By the way, is this comrade suffering from mental illness?
Then he turned his probing gaze to Qiao Caihong, whose meaning was obvious:
【What is this person's background?】
Qiao Caihong glanced at Xu Yun, gently pulled Zheng Tao aside, and whispered:
"Brother Zheng, this comrade's name is Han Li. He was rescued by Guo Gong and others from a fire. He didn't originally work in our factory."
"It is said that he is an international student from the Department of Mathematics of Cambridge University, and his background is extraordinary - Guo Gong has verified this identity, and there is no problem."
Zheng Tao was suddenly stunned:
"Guo Gong? Cambridge University?"
Although due to confidentiality requirements, most people in the 221 Factory use pseudonyms.
There are even examples of people who have worked in Factory 221 for more than ten years and do not even know the true identity of their roommates.
But this is only a common situation at the employee level. Well-known scholars like Lao Guo are another matter.
Perhaps many workers don't know Lao Guo's true identity, but for college students like Zheng Tao who graduated with a major in physics, Lao Guo's identity is not a big secret.
What Lao Guo and Lu Guangda call "anonymity" actually refers to keeping their whereabouts secret from the outside world.
So when I heard the word Guo Gong.
Zheng Tao immediately understood that the person Qiao Caihong was talking about was Guo Youlai.
Lao Guo’s status and reputation coupled with the brand name of Cambridge University...
To know.
The Cavendish Laboratory at the University of Cambridge is currently the pinnacle of physics.
If you are an international student returning from Cambridge...
Maybe this moderately mature young man named Han Li really has some special abilities?
Think of this.
Although Zheng Tao still looked at Xu Yun with suspicion, his attitude was obviously shaken.
Then he looked at Zhang Gongding and Zhou Shaoping beside him, walked to Xu Yun again, and asked him:
"Hello, Comrade Han Li, right? My name is Zheng Tao, and I am currently a squad leader of the sideline construction team. My position is the same."
"I wonder if the water tank... um, plan you are talking about has any theoretical support from physics or engineering?"
Looking at Zheng Tao, whose expression was relatively serious, Xu Yun couldn't help but glance at Qiao Caihong quickly.
Although I can't hear clearly what they talked about.
But the only way Zheng Tao could have a face-changing effect that can be called a Sichuan opera was because the little nurse told him his 'identity'.
In other words.
You can start raising the banner of Cambridge yourself.
So Xu Yun nodded quickly and said firmly:
"Of course there is. This is the most cutting-edge theoretical field at Cambridge University in recent years. Many top experts are studying this theory."
"Comrade, let me ask you a question first. Do you know how to distinguish raw eggs from cooked eggs?"
Zheng Tao blinked:
"ah?"
He was originally preparing to listen to Xu Yun's long speech, but unexpectedly he opened his mouth and said something about raw eggs and cooked eggs.
In surprise.
The whole person couldn't help but feel briefly stunned.
On the other hand, Zhou Shaoping on the side was not too distracted and quickly gave the answer:
"I know, Comrade Han Li, that you can tell the difference just by turning it—cooked eggs take a long time to turn, while raw eggs take a short time."
"The answer is correct."
Xu Yun raised his head and glanced at the elder who wanted to introduce his granddaughter to him in the future. He was wondering whether he should leave an indelible mark on him in this time and space, but he still asked normally:
"Then what's the reason?"
"...."
Zhou Shaoping was a little frightened by Xu Yun's gaze, but he still answered honestly:
"Because the eggshell of the cooked egg and the egg body...that is, the egg yolk and egg white are basically fixed together."
"The shell of a raw egg is separated from the egg. During the rotation process, the shell and the egg move relative to each other, so the energy input from the raw egg is quickly consumed internally."
"The internal energy consumption is fast, and the time for turning the eggs is naturally shorter."
"bingo."
Xu Yun subconsciously wanted to snap his fingers, but when he wanted to raise his hand, he realized that he couldn't move it at all, so he could only sigh silently:
"Very good, let's bring the topic back to reality."
"Then the question is, if we regard the tower as the shell of an egg, how can we quickly dissipate the energy and stop the 'rotation' when the wind force is the same?"
Hearing Xu Yun's words.
Zhou Shaoping and others were suddenly stunned.
After a while.
Zhou Shaoping was the first to react.
He suddenly opened his eyes wide and stared at Xu Yun:
"Comrade Han Li, what do you mean..."
"Can we add an unfixed yolk and egg white to the inside of the egg? Let the wind be consumed internally as quickly as possible?"
Xu Yun raised his eyebrows at him and praised:
"Children can be taught."
Zhou Shaoping's breathing suddenly became rapid.
The examples Xu Yun mentioned were easy to understand, so soon, even Qiao Caihong roughly understood what he was thinking.
A little less than half a minute later.
Zheng Tao, who had thoroughly considered the feasibility, licked the corners of his chapped mouth and asked Xu Yun:
"Comrade Han Li, this plan you mentioned...does it have an official name?"
Xu Yun nodded towards him:
"Yes, its name is Tuned Liquid Damper."
Students who like to play Yasuo should all know this.
The breeze felt on the ground reaches a height of several hundred meters, and the wind speed can reach tens of meters per second.
We waited until we reached an altitude of three hundred meters.
The effect of wind can cause a skyscraper to withstand a force of 8 kilograms per square meter, causing the building to produce significant amplitude.
More seriously.
After wind passes around a skyscraper, it will form an asymmetrical vortex behind the building.
When the vortices fall off alternately from both sides of the building, once to the left and once to the right, a periodic force will be exerted on the building, causing the building to vibrate.
When the wind reaches a certain level, the building may resonate.
In this situation.
The shaking of the building will become larger and larger, even...
collapse.
Therefore, for a long time, people have designed many methods to avoid resonance and ensure the safety of buildings.
For example, use asymmetric shapes, oblique network truss structures, etc.
With the development of the construction industry.
Around the end of the 1970s, an emerging technology with far-reaching impact appeared in the construction industry.
That is.....
Damper.
The earliest damper was a large mass. When the building swayed under the influence of wind, the wind damper would move like a pendulum.
The wind transfers energy to the building, and the building transfers energy to the mass, which will sway in the opposite direction to the building.
The hydraulic cylinder between the mass block and the building releases mechanical energy into heat through friction and other means, so the stability of the building is maintained.
This technology appeared relatively late, let alone the time it was introduced into the country.
The concept of domestic dampers will really enter the public eye and be widely disseminated, probably around July 2021.
At that time, typhoon fireworks hit the Magic City, and the Central Building, known as the tallest building in China, started to take measures to prevent wind and typhoon.
The most famous one is the giant damper known as the "Magic City's Insightful Eye".
This damper consists of a mass block weighing 1,000 tons and a sling. It resonates with the main structure and can reduce the shaking of the building.
On the day when fireworks hit the Magic City.
This entry even occupied the first place on the hot search list for a long time, and the second one was when Wang Feng released a new song.
Another data that can reflect that dampers are an emerging technology is the application scenarios of dampers:
Even in 2021.
There are only two skyscrapers equipped with giant dampers in the entire Magic City, namely the Central Building and the World Financial Center. There is not even one in Yangcheng.
At that time, a meme also appeared on the Internet.
It is said that because there are more black people in Yangcheng, there are no dampers...
Ahem, let’s get down to business.
Actually.
Except for the late development.
There are also many types of dampers.
For example, it can be divided into several types such as mass-tuned dampers, tuned liquid dampers, viscous dampers, etc.
Among them, tuned liquid dampers are commonly found in low-rise buildings. For example, many communities on the 20th and 30th floors use tuned liquid dampers.
in liquid dampers.
Liquid flow will cause dissipation, that is, momentum will be transferred to the liquid body through viscous resistance, thereby dissipating vibration energy and reducing the amplitude of the structure.
Of course.
The fluid mechanics of this era is far from as mature as that of later generations.
Therefore, Xu Yun chose a simpler example to explain, that is, reincarnated eggs and cooked eggs.
And the other side.
Zheng Tao and others were completely in shock and contemplation.
College students these days are not as bad as those of later generations, especially top students like Zheng Tao who graduated from science and engineering majors. Their thinking ability is the ceiling of their peers.
After Xu Yun mentioned this, they quickly reproduced the relevant scene in their minds.
So it's very fast.
Zheng Tao and Zhou Shaoping looked at each other again, and each saw a meaning in the other's eyes:
like.....
Is there a door?
At least with their thinking ability, they really can't think of a reason to refute it.
Think of this.
Zheng Tao couldn't help but take a deep breath again, turned to Xu Yun and asked:
"Comrade Han Li, thank you very much for your valuable suggestions. I will report this plan to the team leader now. Maybe it will be of great help."
"As for Comrade Han Li...are you waiting for news here, or are you going to the watchtower with us?"
Of course Xu Yun didn't want to miss such an occasion, so he immediately replied after hearing this:
"I'll go over and have a look too."
Zheng Tao has no objection to this.
So a few people quickly changed direction and walked towards the watchtower with Lao Bai and his team members.
The location of the watchtower was not far from the grove, and within a few minutes, everyone arrived at the watchtower.
At this moment.
There were about a dozen workers gathered near the watchtower, most of whom were shirtless and humming while adding cement along the bottom of the watchtower.
no way.
In this period, if you want to strengthen buildings against earthquakes, the basic idea is to increase the volume...
In fact, it’s not just now, even in 2023, don’t many P Club players also like to do this kind of thing?
Then Zheng Tao walked up to a little old man who looked like the person in charge, gestured to him and started talking.
The little old man was about fifty, thin, with gray hair on his temples. He wore a small felt hat on his head.
After hearing what Zheng Tao said.
He was slightly stunned at first, then turned to look at Xu Yun, and quickly fell into deep thought.
After a while.
He shook his head, but under Zheng Tao's repeated insistence, his expression began to become hesitant again.
after awhile.
The little old man still nodded reluctantly and waved his big hand gently, as if he had made some decision.
Zheng Tao stood at attention excitedly and greeted others to start working.
Rectangular water tanks may not be easy to find in later generations, but for today's 221 Factory, they are not a rarity:
Unlike the Bosten Danshui Lake adjacent to the Malan Base, the Qinghai Lake next to the Jinyintan Base is an authentic saltwater lake.
Therefore, water within the base often requires the use of some equipment for external supply and transportation.
Pipes are the foundation, and various water tanks are often used as supplements.
So it's very fast.
Zheng Tao and others found a flat rectangular iron water tank that met Xu Yun's requirements.
Then they hoisted the empty water tank to the top of the watchtower through the pulley block, then sent several buckets to the top in turn, and filled them with water one after another.
throughout the process.
The rest of the people were either helping, or watching the show with their arms folded, and they also cast their eyes on Xu Yun from time to time.
More than twenty minutes later.
Xu Yun noticed that the "Old Bai" who seemed to be a little generous, bent down and fiddled with it for a few times, and then went up to the watchtower with an instrument.
It's a coincidence.
Not long after Lao Bai went upstairs.
A strong wind blew from the south of the tower.
Hula la~~~~
The strong wind swept in with a large amount of sand and gravel, and the sky was covered with gray. The wind force was at least level 8 or above.
See this situation.
Workers at the scene ran to the watchtower or behind the vehicle to hide from the wind. Zhou Shaoping, Zhang Gongding and Qiao Caihong worked together to push Xu Yun's wheelchair behind a pile of rocks against the wind and sand.
Tear--
The strong wind blew up a piece of cloth hanging on the watchtower in an instant. The cloth swirled in the air for a few times and then disappeared from everyone's sight.
After quite a while,
The dust had just stopped making noise.
Wait until the wind and sand disappear.
Heads popped out around the watchtower like a game of whack-a-mole.
After shaking off the sand from my body.
Everyone unanimously turned their attention to...
The top of the watchtower.
Then less than half a minute passed.
Under the gaze of everyone on the ground, Zheng Tao suddenly poked his head out from the top of the tower and shouted excitedly:
"Teacher Yao! The measurement results of our level instrument are completely normal, and the tower is not shaking!"