Looking through the documents in his hand, Xu Chuan's eyes fell on each technical report and plan.
The electromagnetic railgun is an advanced kinetic energy killing weapon made using electromagnetic launch technology.
I believe that friends who like to watch science fiction movies or novels are familiar with this concept.
Whether it's the Gauss rifle in "StarCraft" or the railgun that shot through Transformers in "Transformers", they are all different types of electromagnetic railguns.
The former is a coil-type electromagnetic rifle, while the latter is a heavy electromagnetic rail gun, which is the technology mentioned in this report.
Unlike traditional cannons that apply gunpowder gas pressure to the projectile, the electromagnetic railgun uses the force of the electromagnetic field in the electromagnetic system to increase the speed of the projectile.
To put it bluntly, it is actually a combination of electricity, magnetism, rails and guns.
Anyone who has played with magnets as a child knows very well that magnets have two levels, north and south. Similar levels repel each other and opposite levels attract each other.
If you put a magnet on the table and you bring another magnet of the same level close to it, the magnet on the table will be pushed forward by the magnetic field.
The principle of the electromagnetic railgun is similar.
It's just that it consists of two parallel guide rails (can be regarded as magnets), and the driven object is not the magnet set itself, but the projectile sandwiched between the two guide rails.
When the two guide rails are connected to the power supply, the current flows through one guide rail to the projectile and then to the other guide rail to generate a strong magnetic field. The magnetic field interacts with the current to generate a strong ampere force to push the projectile to a very high speed.
The principle of the large strong particle collider in the physics community is similar to this. They use magnet groups and superconducting materials to provide strong magnetic fields to increase the speed of particles.
Theoretically, an electric rail gun can increase the speed of the projectile to sub-light speed, or even infinitely close to the speed of light.
However, according to Einstein's special theory of relativity, the higher the speed of an object with rest mass, the more energy it requires.
Therefore, it is currently impossible to reach infinitely close to the speed of light or sub-light speed.
But compared to traditional chemical fuel-propelled artillery shells or missiles, the speed that electromagnetic railguns can increase is much higher.
Take hypersonic missiles as an example. Missiles that can fly at a speed exceeding Mach 5 (that is, five times the speed of sound, approximately 6125.4 kilometers per hour) are internationally recognized hypersonic missiles.
There are only a handful of countries in the world that currently possess hypersonic missiles.
However, for electromagnetic rail guns, an ordinary laboratory-level electromagnetic rail gun is 6 meters long, which is enough to accelerate the ammunition to 8,000 kilometers per hour to 10,000 kilometers per hour.
This speed can easily exceed the hypersonic missiles possessed by few countries.
However, this is just a conventional version of the electromagnetic rail gun. If the design is optimized, the shell speed of the electromagnetic rail gun can be increased even higher, easily reaching more than 10,000 kilometers per hour.
This alone is enough to attract the attention of all countries.
The purpose of the "Feasibility Demonstration of Ultra-high-speed Precision Strike Electromagnetic Railgun Technology" document in Xu Chuan's hands is to develop an ultra-high-speed electromagnetic railgun exceeding 10,000 kilometers per hour.
But this level of electromagnetic railgun has two biggest problems.
Guidance and orbital ablation.
The former is the core of precision strike, and the latter is the key to continuous launch.
However, both of these will cause problems due to the strong electromagnetic field that the electromagnetic railgun itself has during operation.
For example, guidance, current missile guidance, whether it is satellite guidance or radar guidance, is inseparable from the chips and electronic parts inside the missile to receive signals and adjust the trajectory.
However, because the electromagnetic railgun uses an electromagnetic field to accelerate the projectile, the chips and electronic parts inside the projectile are extremely easy to be damaged when faced with super strong electromagnetic fields.
Therefore, most electromagnetic gun projectiles currently studied by various countries use solid projectiles and do not have a guidance system.
But correspondingly, its power will be greatly limited.
After all, a steel cannonball can only cause kinetic damage at most.
A cannonball loaded with explosives can also cause explosive damage.
Therefore, how to solve the problem of projectile accuracy and guidance is a key problem that countries need to overcome.
As for track ablation, it means that during high-speed launch, strong friction and temperature rise will cause damage to the track, greatly reducing the service life of the track and affecting shooting accuracy and reliability.
The United States also invested a lot of money in the development of electromagnetic railguns, but ultimately gave up in 2019 due to the problem of orbital ablation.
Therefore, in order to actually apply the electromagnetic railgun on the battlefield, the two problems of precision guidance and orbital ablation must be solved.
And just as Xu Chuan expected, in this report document "Feasibility Demonstration of Ultra-high-speed Precision Strike Electromagnetic Railgun Technology".
The core problems are these two.
As for how to solve these two problems, experts in the domestic military industry and the Academy of Sciences put forward several feasibility demonstrations in the report.
Among them, the most feasible way to solve the problem of electromagnetic track ablation is to solve it through mathematical model AI.
However, it is unimaginably difficult to establish a mathematical model for the complex magnetic field conditions when the electromagnetic railgun is operating.
Because it not only involves electromagnetic interference, scattered electric fields, electromagnetic diffusion and other issues, but also various complex conditions that are difficult to solve, such as the vortex magnetic current that appears after the gun is ejected from the chamber, interference caused by high temperature, etc.
This level of problem cannot be solved by the team that designs and feasibility papers on the electromagnetic rail gun.
Even if they approached the mathematical academicians from the Academy of Sciences, all of them shook their heads and expressed that they were powerless.
In the end, I had no choice but to give it a try, so I approached Xu Chuan and wanted to ask him for help to see if there was any suitable research direction.
.......
After reading the document in his hand, Xu Chuan put it on the coffee table and started thinking.
This chapter is not finished yet, please click on the next page to continue reading the exciting content! Opposite the sofa, Gao Hongming was worried and finally couldn't help asking: "Academician Xu, is there a solution to the problem of the electromagnetic rail gun?"
Xu Chuan shook his head and replied: "I don't know."
Gao Hongming: "?"
I do not know what that means?
After thinking for a while, Xu Chuan said: "The difficulty of this problem is not small. The targeted mathematical model involves a world-class mathematical conjecture, that is, the analysis and calculation problem of the three-dimensional elliptical electromagnetic field and high-dimensional large-scale backscattering problem. It requires
It’s not that easy to solve.”
"World-class math puzzle?"
Hearing this answer, Gao Hongming was stunned for a moment, unable to react.
When he came, didn't the experts say that this was a magnetic field problem? How could this involve a world-class mathematical conjecture?
"Um."
Xu Chuan nodded and said with a smile: "In the electromagnetic field, the ill-posedness and the appearance of many local minimum points make it difficult to design a solution. Due to the existence of multiple local minimum points, the classic iterative optimization method cannot calculate
The global minimum point..."
"Another difficulty is ill-posedness, which means that very small disturbances in measurements may lead to large errors in solution calculations..."
"In addition, there are also large-scale forward and reverse scattering problems. A particularly important type of problem is the propagation of electromagnetic waves in complex media, which is also extremely difficult to solve and calculate..."
Across the sofa, listening to Xu Chuan's explanation, Gao Hongming was already confused.
A lot of various academic terms knocked him unconscious and made him feel confused.
"Wait, wait..." Gao Hongming, who was dizzy, finally couldn't help but interrupted Xu Chuan's explanation, and couldn't help saying:
"Well, Academician Xu, I really don't understand anything you said. Can you just tell me if there is a solution?"
Xu Chuan sighed, shook his head at his impatience, and said, "I told you I don't know. How can a world's mathematical conjecture be so easy to solve?"
After a pause, he continued: "But I can give it a try, but I can't guarantee whether I can solve this problem."
"Oh, that."
Gao Hongming, who was stunned by a lot of mathematical terms, had not yet reacted, so he replied smoothly. But he reacted immediately, with a surprise smile on his face, and he spoke quickly.
"Enough, enough, this is enough."
He was surrounded by Xu Chuan.
Originally, the purpose of coming here this time was just to ask Xu Chuan for help to see if there was a solution, and to ask him to help point out the research direction.
After all, in terms of magnetic field research, this person's ability is unique in the country.
Maybe he can give some plans or directions from other perspectives?
Come here with the documents, that's the purpose.
As for asking Xu Chuan to help solve this problem, there is actually no such purpose for coming here this time.
After all, this person has many research projects and things in his hands, and it is very satisfying for them to be able to give some plans and directions.
I never thought about asking him to help solve this problem.
Unexpectedly, Xu Chuan would offer to give them a try.
"Well...Academician Xu, this won't delay your own research, right?"
With a smile on his face, Gao Hongming thought for a while and then asked: "If you don't have time, it will affect your research. I will arrange for the corresponding researchers to come over. It's okay if you take the time to point them in the direction."
Although electromagnetic railgun technology is important, the research project in hand is even more important.
The former can only be said to be the icing on the cake for them now.
After all, today's national defense force will not have any impact without electromagnetic rail guns.
But the research in this man's hands is groundbreaking no matter what it is.
Without him, it is no exaggeration to say that there is a high probability that everything will stagnate.
To stop pioneering technologies in other cutting-edge fields for the electromagnetic rail gun is not worth the gain.
Xu Chuan glanced at him and said: "If you can find a mathematician who can solve world-class conjectures, I have no problem with it."
Hearing this, Gao Hongming smiled and touched his nose feeling embarrassed.
Although he does not understand how big the mathematical conjecture problem Xu Chuan mentioned is, can it really be solved in China that can make this person find it difficult?
With a cheeky smile, Gao Hongming skipped the topic and asked: "That would be great if you are willing to help. Is there anything you need my help with?"
Xu Chuan thought for a moment and then said: "If there is an experiment on the electromagnetic railgun project in China, just package the relevant experimental data and give it to me."
"Others are gone for the time being."
"Okay, this is no problem. I'll have someone prepare it immediately after I get back." Gao Hongming showed a smile on his face and said quickly: "If you have anything else, just tell me."
"Okay, leave this report with me for now. If you don't have anything else to do, you can go."
When Gao Hongming heard Xu Chuan driving people away, he didn't care. He chuckled and said, "Then I won't bother you for now."
...
Looking at Gao Hongming's leaving figure, Xu Chuan gently shook his head.
Just a few days after I had some free time, things happened again.
However, he was still quite interested in this kind of question.
I am not interested in electromagnetic rail guns, but I am interested in solving the basic problems in mathematical physics and electromagnetic fields that exist in this technology.
Since the Weak Riemann Hypothesis was solved, he has seldom delved into difficult problems in basic science fields such as mathematical physics.
It just so happens that idleness is idleness. Before officially launching a charge towards the Riemann Hypothesis, it is better to use this to get a feel for it.
But the experts from the Military Industry Port, to be honest, are really brave enough to think about it.
His eyes fell on the electromagnetic rail gun document on the coffee table, and a scene that he had seen on TV a long, long time ago appeared in Xu Chuan's mind.
That can be regarded as his childhood memory, a domestic special photo TV series called "Armor Warrior".
He remembered that in this special-shot TV series, the protagonist team had a space-based ERP satellite, through which the energy beam of 'transformation' was transmitted to the protagonist on the earth.
He has a very deep memory of this scene.
The profound reason is that this satellite looks very handsome when it is deformed.
In the document "Technical Feasibility Demonstration of Ultra-High-Speed Precision Strike Electromagnetic Railgun", experts from the Military Industry Port put forward a similar concept.
That is to build an electromagnetic railgun satellite in outer space orbit, which is somewhat similar to the ‘tungsten rod space-based satellite’ proposed in the last century.
But unlike tungsten rods, which use gravity to accelerate and free-fall space-based weapons, electromagnetic railgun satellites can accelerate similar projectiles like 'tungsten rods' through a narrow electromagnetic orbit.
The long and narrow track can lift it to a free fall speed far exceeding that of a 'gravity tungsten rod', allowing it to deliver a devastating blow to the ground.
Theoretically speaking, when this kind of 'tungsten rod' falls from the sky with extremely high kinetic energy, there is basically no problem if a cannon shell directly destroys not only a country, but also a city, such as Edo Castle in Sakura Country.
Because essentially, it is a meteorite that hit the earth at super high speed.
It's just that the impact point of this 'meteorite' can be controlled, and its power can be controlled and calculated.
