Academician Chen Yunmin: Two days and one night, the hammer "knocked" the first fund project

Wen ｜ Yang Xi Qi Kunpeng

In 1989, Dr. Chen Yunmin, an academician of the Chinese Academy of Sciences and a professor at Zhejiang University, graduated from Dr. Chen Yunmin, and accidentally received an emergency task entrusted by Hangzhou Laqiao Airport -when the plane continued to fly, he used the shortest time to check out the airport runway. Causes of sinking and cracking.

This task has since endured the National Natural Science Foundation of China.

Chen Yunmin further condensed scientific issues from the solved engineering technical problems- "The spread of the transmission of elastic waves in the soil layer under the effect of impact loads" was approved by the National Natural Science Foundation of China in 1991 Referred to as the Youth Science Fund), which laid the foundation for his engineering technology and basic research career in the next 30 years.

Chen Yunmin

It is impossible to take it out, and the righteousness is not the same as the courage to bear

Speaking of the past to detect the runway of Laqiao Airport, Chen Yunmin is still vivid.

As the only airport in Hangzhou at that time, Laqiao Airport undertook the take -off and landing mission of all aircraft in Hangzhou. Before the airport runway test, everything was unknown: Will the settlement continue? Will the cracks expand? Can the aircraft take off and land normally?

According to the technology at the time, theoretically, it was necessary to "open the stomach" of the runway. But in this way, the airport needs to be closed, and all planes are grounded and spent too long.

If there is a little loss, the impact and loss caused by all parties will not be estimated. The airport fell into a dilemma.

At the critical moment, Chen Yunmin dared to take responsibility and proposed a set of detection schemes that did not affect the normal operation of the airport.

"Throwing a stone into the water, you can see the spread of water waves. This is the phenomenon of fluctuations. The foundation will cause uneven settlement and cracking of the runway. The characteristics of the dissemination of the medium and the full contact medium are different. "Chen Yunmin introduced his testing method." I knocked on the runway with a hammer and tested the dissemination characteristics in the foundation wave to detect the runway to take off the runway. Empty position. "

Chen Yunmin collected data when there was no sailing mission at night. "Hangzhou's summer temperature is very high, and the runway has been exposed during the day. The ground temperature at night is still as high as 378 degrees Celsius. It is very hot and bitter to lie on it overnight. Memories.

The physical suffering of the body passed. At that time, the biggest difficulty in Chen Yunmin was that the signal data collected on the spot could not be viewed at the scene. Can send the data to the laboratory analysis early the next morning.

Time and heavy tasks, Chen Yunmin suffers a lot.

After two days and one night, Chen Yunmin submitted a formal report to the airport according to the detected result "right medicine".

The relevant design institute is based on this to reinforce the place where the runway is empty and the crisis is lifted. The stone hanging in his heart fell to the ground.

The "treatment plan" formulated by Chen Yunmin not only accurately finds the position of the airport runway from the air and cracking, but also meets the requirements of the airport and the aircraft.

It is worth mentioning that the effective detection technology of this line was later widely used by airports such as Wenzhou and other places.

However, Chen Yunmin did not stop here. Because this testing technology was the first in China at that time, he believed that the "problem of the spread of the hind -knocking in the layered medium in the middle wave" needs to be conducted further from the scientific theoretical level. support". With such a goal, he applied for the Youth Science Fund.

In November 2014, Chen Yunmin made a special report at the 7th International Environmental Poly Industry Conference.

Tiandao paid, Bao Jianfeng came out from sharpening

"In my opinion, the youth science fund is the first 'baptism' accepted by young scientific researchers to enter the door of basic research." When talking about the influence of the Youth Science Fund, Chen Yunmin sighed.

Looking back now, the Youth Science Fund will give him not only 30,000 yuan in funding funds, but also the realization and satisfaction of self -worth after the peers recognize, and the opening of curiosity and interest in scientific research endlessly.

In the following year, Chen Yunmin excavated the data collected by the laboratory, realized the theoretical modeling and derivation of theory from the quantitative level, and opened the door of basic theoretical research.

In the field of "spreading in the foundation" research field, the Dao went wider and wider, and the road became farther and farther.

For more than 30 years since then, Chen Yunmin has been engaged in the research and technical research and technology of weak earth static dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dynamic dwells and technical and technical research, and proposed the shear wave speed representation model of the initial liquefied intensity of the sand and the corresponding seismic liquefaction method and processing technology. A number of graduate students such as Zhou Yanguo, a hundred outstanding doctoral dissertation in the country.

Touring the roots, these follow -up scientific research and talent training work have inextricable connections with the Youth Science Fund.

"During the earthquake, the earthquake waves will cause foundation liquefaction. The house is like built in the water and will collapse. Therefore, what kind of soil and how large the earthquake will be liquefied is a very critical problem to be solved." 2013 By 2020, Chen Yunmin participated in the international parallel test funded by the National Science Foundation.

Through the experiment, he and the team proposed the criteria for earthquake liquefaction, which received verification of 422 venue liquefied surveys of 422 venues over the past 50 years of the world. The rules of the judgment are called "Zhou -Chen model" internationally. Coincidentally, when the Beijing -Tianjin high -speed rail trial operation in 2007, Chen Yunmin, who had a strong research interest in the "spread in the foundation", watched the gallium train and couldn't help thinking about how the high -speed rail on the foundation kept the carriage under the state of high -speed operation. smooth.

During the trip, the wheel load of the high -speed rail was passed to the rail pillow through the rail, and then passed to the road.

The trains should run smoothly, and the subsidence of the roadbed must be controlled within the scope of safety. If the sink is too large, bumps occur, which may cause train safety problems.

Based on this, Chen Yunmin's team innovatively proposed that the power load was directly applied to the pillow.

"The train is like playing the piano, and the pillow is like piano keys. The pillow is one after another to achieve the loading of the roadbed on the road base. At present, the simulation speed can reach 360 km/h. We are working hard at 500 km/h. "He says.

Chen Yunmin has always maintained a strong curiosity and exploration of science for decades, always maintaining a scholar.

His research results won 3 National Science and Technology Progress Awards, and nine first prizes of provincial and ministerial science and technology progress awards.

In November 2019, the "Ultra -Gravity Corporation Simulation and Experimental Device" project was launched. Interviewee confidence

Each leading coquet

Chen Yunmin has received 13 National Natural Science Foundation projects, including the National Outstanding Youth Science Fund project, basic science center project, key projects, and projects.

But what made him unforgettable so far is the first national natural science fund project he has obtained -Youth Science Fund.

It was the first time in his life independent and independent scientific research projects, and the continued related research results were the first time to receive national awards.

Chen Yunmin always believes that the Youth Science Fund is conducive to enhancing the ability of youth researchers to innovate and carry out collaborative research. This is an important fund project that cultivates independent scientific research and inspires innovative thinking.

However, "at this stage, the annual funding rate of the Youth Science Fund is less than 20%. Many young people may apply for several times in a row and eventually miss the opportunity to miss the line."

From the perspective of cultivating more scientific research talents for the country, Chen Yunmin suggested that "the funding rate of youth science funds should be increased."

Chen Yunmin pays great attention to team building and talent training. "Combining 'personal free exploration and team goal' to cultivate team talents to ensure that they are not only in line with the rules of the growth of young people, but also take into account the overall development direction of the team." The application for many projects is not much beneficial to the development of the team and the individual.

"Our team will reasonably take into account the proportion of young people's free exploration and team tasks. For example, in the early stage of research work, we hope that young people will use 70%to 80%of their energy to undertake the task of the team. After more exercise and growth, the task distribution ratio will change, and the time of free exploration will increase. "Chen Yunmin said.

In response to personal future development, Chen Yunmin suggested that "when you are young, you should transform his interests into specialties and advantages in time."

He did this himself, and the research concept of combining engineering problems with scientific research interest penetrated the entire scientific research career.

"The stronger interest, the more you feel that the research is happy. Only by maintaining interest can you be able to take your strength and play your own talents and advantages to the greatest extent. Otherwise, it is likely that it will be due to various kinds of time because of various kinds The reason is lost in this field. "Chen Yunmin said.

Looking back at more than 30 years of scientific research, Chen Yunmin summarized 9 words with young people- "standing high, looking far, deep, deep."

Good scientific research atmosphere, advanced scientific research equipment, and open vision are objective conditions that can be provided outside. But sometimes, why are they standing on the same platform, but everyone's gains are different?

Chen Yunmin believes that the most important thing is to see far and deep. "Only in this way can we constantly condense and solve key scientific issues, explore the scientific principles of new technologies, and apply it to engineering."

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"China Science News" (2022-09-26 The 4th edition of the 4th edition of the Natural Science Foundation of China was originally titled "The first" baptism "in the basic research door"))

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Edit | Zhao Lu

Capture | Guo Gang

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