Chang'an Bell Tower, crowded with people.

The roundabout lane near the bell tower has been closed, the vehicles have been detoured, the police and security guards lined up in a long human wall, looking at the black crowd as if facing a great enemy, a middle-aged policeman holding a megaphone, hoarsely shouted: "Please line up and line up, the capacity of the scenic spot is limited, please enter in an orderly manner, do not crowd, pay attention to safety......"

After shouting for a long time, I found that the little brothers, sisters, uncles, aunts and aunts all looked at him with smiles, and they didn't mean to go in.

"Aren't you going in?"

"No. ”

"And you still buy tickets?"

"Collection. ”

"I'm a hospitable Chang'an person, so of course I'm going to accompany you. ”

"I'm afraid that there are too many people buying tickets today, so I went in and disturbed Xiaobai. ”

"Buy a ticket to post on Moments. ”

"Prove I've been here. ”

"I'll come back later. ”

Each had its own reasons, but no one had any intention of going in.

An aunt also smiled and said, "Young man, don't worry too much, let's rest, we won't go in." ”

"Yes, I won't bother you. ”

The middle-aged policeman who was called a young man blushed, he relaxed a little, and asked with a puzzled expression:

"Didn't you come to see the stars?"

He has seen a lot of star chasers, but he has never seen a few so sensible.

As the ancient capital of the Thirteen Dynasties, there are often dignitaries, foreign guests, and celebrities who come to Chang'an, and many of them need to do a good job of security.

Among them, celebrities are the most troublesome, especially some very popular stars to participate in commercial performances, and they have to work hard every time to maintain order on the spot.

God knows how those young ladies who can't even lift a bucket of water, when they see their idols, they are so strong, they are like crazy zombies who can tear apart everything that stands between them and their idols.

Hearing the middle-aged policeman say this, a group of people were not happy:

"My little white is not a star. ”

"Yes, we are artists!"

The middle-aged policeman was at a loss: "Artist? I just saw, such a young man, artist?"

"Uncle, you haven't even seen Xiaobai's performance!"

"Brother, you should listen when you go back. ”

"Big brother, you offended me, do you know!"

A group of people desperately denounced it, and then someone else asked:

"Uncle policeman, when Xiaobai is on tour, do you want to maintain order?"

"Uh, let's go......" The middle-aged policeman was also unsure.

"I highly recommend you take a trip, sincerely. ”

The middle-aged policeman doesn't take it too seriously, every fan has the same attitude towards his idol, crazy admiration, and he has seen a lot over the years.

But in fact......

Suddenly, the crowd cheered.

"It's out! It's out!"

The middle-aged policeman immediately became vigilant, he looked up following everyone's gaze, and saw Gu Xiaobai appear on the platform of the bell tower.

On the high platform of the bell tower, Gu Xiaobai, Deng Shunyang, the accompanying staff of the scenic spot, and several experts from the Northwest Historical Association finally walked out of the bell tower and came to the front of the big bell hanging on the high platform.

This is a generation of famous clocks Jingyun clock...... The imitation, the real thing, which has been reluctant to ring because it is too precious, has now been put into the museum. Decades ago, the real thing rang once and then it was recorded. Now the bell of saying goodbye to the old and welcoming the new in the radio and television every year comes from Jingyun Clock.

An expert introduced: "In fact, this bell was originally placed in the bell tower, when Qianlong was five years old, the governor Zhang Kai rebuilt the bell tower according to the original structure, but found that the house covered with the Jingyun bell was impermeable, so that the bell 'did not come out', and the sound outside sounded very small, so the bell was moved from the house to the outside......

Deng Shunyang nodded and said: "The acoustic knowledge of the ancients is insufficient, and the bell tower has not undergone acoustic design, so this situation will occur, we come to learn from the experience this time, just to see how to take into account the beauty of Chinese architecture, as far as possible without changing the original appearance at the same time, complete the acoustic design, so that the house will not only not limit the bell, but can become the sound regulator of the bell, beautify and adjust the timbre of the bell, and strengthen the loudness of the bell......"

Speaking of this, Deng Shunyang shook his head, it seems that the Chang'an Bell Tower is actually a negative teaching material......

Gu Xiaobai looked up at the big clock in front of him, this bell is actually not too big, 2.47 meters high, weighing 6 tons, compared with the 46-ton Yongle bell, it is a small one.

But this bell is still a legend in history, because it has an inscription written and written by Tang Ruizong Li Dan himself, and it is also the only bell with an inscription written by the emperor himself.

The book reads: "The original husband is condensed in one breath, containing purple and void and constructing extremes; Although the road is inactive, the good things are returned to the good loan, and the wonderful door is taught, and the blame lies in the hope ......"

Because the emperor of the Tang Dynasty and Lao Tzu both had the surname Li, so they proclaimed themselves the descendants of Lao Tzu and respected Taoism alone.

And Tang Ruizong Li Dan is also very special, because his mother is Wu Zetian, so he is the only emperor in history whose parents are emperors, which can be called a double emperor......

And Li Dan is talented and proficient in calligraphy, and this big bell is also very meaningful to the study of calligraphy.

Nearby, several scholars from the Historical Society personally served as tour guides, and many of them personally presided over the reproduction of the bell and the restoration of the bell tower, which is naturally very interesting.

Deng Shunyang, a science and engineering man, nodded again and again when he heard it, if he hadn't followed Gu Xiaobai, he would definitely not have this kind of face this time, and he could let these history masters help him be a tour guide.

Gu Xiaobai looked at the big bell, but there was some wandering, at this moment, his eyes were firmly fixed on the big bell, and he muttered in his mouth:

"It can be approximated as a finite element of the axisymmetric problem, with 17 nodes, each node having two degrees of freedom, and the node displacement is ...... The element has a total of 34 degrees of freedom, so its displacement function is ......"

"The nodes and displacements are calculated to be determined, and the interpolated displacement function f=...... is obtained by substitution"

"Strain and Stress...... The stress on the element is ......"

"Element stiffness matrix K......"

Gu Xiaobai muttered in his mouth, then slowly closed his eyes and quieted his mouth.

Seeing that Gu Xiaobai was distracted, the seven or eight people accompanying him were quiet, and a historian pulled Deng Shunyang next to him, and asked in a low voice: "Director Deng, what is Teacher Xiaobai doing?"

"If I'm not mistaken, he should be doing finite element analysis on this big clock......" Speaking of this, Deng Shunyang couldn't help but burst into foul language: "Who is using his own brain to do finite element analysis!"

Do you want to sell professional software? Can high-end computers still be sold at a high price? Do you want to rent out supercomputers?

Is this kid human?

After a while, Gu Xiaobai raised his head, his eyes sparkled, and he looked like a child excitedly: "Can you ring this bell?"

"Yes, yes. The staff next to him "knock~buzz......" rang the bell.

The bell rang and was heard far away.

Below, when the crowd heard the bell, they all looked up and listened.

Gu Xiaobai took a step forward, stretched out one hand, held one of the tuning mastions of the big bell, and then pressed the other hand on an inscription on the side of the bell.

In an instant, the bell changed.